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"Red is Dead" Optical Mice LED Change

A reader sent us the HOWTO for changing that red LED on your fancy-pants new optical mouse to blue - or, I suppose any other color. I think I'm fine with what I've got - although, the glass tops on tables does make using optical mice a pain there.

490 comments

  1. why?? by Anonymous Coward · · Score: 2, Insightful

    You don't really stare at the light under your mouse do you?

    1. Re:why?? by Anonymous Coward · · Score: 0

      Its funny all the first posts that didn't get first post when this one was on topic as well...

    2. Re:why?? by Anonymous Coward · · Score: 0

      No, but a red light helps you to find your mouse in the dark.

    3. Re:why?? by Anonymous Coward · · Score: 0

      almost any light source would help in that situation...i think its called a light switch, try it next time

    4. Re:why?? by GT_Alias · · Score: 5, Insightful
      Cuz d00d....it's 1337!!

      Serously, why do you need to ask why? Present a geek with a gadget, and he will find some pointless way to modify it, just for the sake of modifying it.

      Me? I think it'd be cool as hell to have a blue LED light under my mouse.

    5. Re:why?? by Jugalator · · Score: 4, Insightful

      Still, MSI color their mother boards, including ports, etc in a purple hue. I'm pretty sure they'd get the material in that boring green color easier, but it's all about standing out of the crowd. Same reason to why you'd make your LED blue.

      --
      Beware: In C++, your friends can see your privates!
    6. Re:why?? by nmg196 · · Score: 5, Funny

      Matters not, whether you can see it.
      Red, it is.
      Feel it, you can.
      Blue, it must become.

      The force is not strong with you... Much to learn you have.

    7. Re:why?? by BigBir3d · · Score: 3, Informative

      interesting story here.

    8. Re:why?? by Sj0 · · Score: 1

      Most optical mice seem to have parts which glow from the LED. My logitech, for example, is made mostly of clear plastic.

      --
      It's been a long time.
    9. Re:why?? by Anonymous Coward · · Score: 1, Funny

      that is why i am keeping the red led... the "1337" crowd will switch over to blue, and then suddenly see that it is no longer cool to be blue, but my mouse with its lone little red eye will suddenly be the color of "1337"

      oh know, i just gave away my plan...

    10. Re:why?? by Anonymous Coward · · Score: 0

      just don't show us yore mouse's lone little BROWN eye.

    11. Re:why?? by Anonymous Coward · · Score: 2, Funny

      When I changed my LED a few years ago, I also overclocked the mouse sensor to 8x its shutter rate. When my friends ask me why my mouse works better than theirs, I tell them it's because I have a blue LED.

    12. Re:why?? by Jeremy+Erwin · · Score: 5, Funny

      Hah. That's nothing. I overclocked my mouse sensor to 10x. Of course, my palm is occasionally injured by the blades of the cooling fan, but I found the extra precision is useful for negotiating a bloody mousepad...

    13. Re:why?? by vogelap · · Score: 2, Funny

      Sheesh... Just 10x? I did mine to 10.3x and then a week later OC'd it to 11x oversampling.

    14. Re:why?? by Mike1024 · · Score: 2, Funny

      Hey,

      I think it'd be cool as hell to have a blue LED light under my mouse.

      When I first read that I thought you said house, and I pictures a building raised up, with blue light eminating from under it, like a modded car.

      That'd be kinda cool...

      Michael

      --
      "Goodness me, how unlike the FBI to abuse the trust of the American public." -- The Onion
    15. Re:why?? by octalc0de · · Score: 1, Redundant

      supposed to be funny? but I can't find a link anywhere about overclocking a mouse. Have I been trolled?

    16. Re:why?? by Anonymous Coward · · Score: 0

      I have some of that flashing LED jewellery lodged inside my mouse. Beat that!

    17. Re:why?? by idontneedanickname · · Score: 1

      It's actually blood red, same with their graphics cards. Seems the picture isn't that good on the color side...

    18. Re:why?? by Decimal · · Score: 2

      You don't really stare at the light under your mouse do you?

      I use my red-mouse light to blank out the memory of certain people I meet, just like the Men in Black do. I'm hoping to update mine to the blue version mentioned in the article to come in line with the sequel.

      It really works, too! Watch, I'll demonst...

      Who are you?

      --

      Remember "Bring 'em on"? *sigh
    19. Re:why?? by Anonymous Coward · · Score: 0

      For enhanced precision, nothing beats my 110 V mouse mod. The only drawback is that you must use a fire resistant mouse pad, because the LED will burn a hole into your desk otherwise.

  2. woodgrain by Anonymous Coward · · Score: 1, Insightful

    it doesnt like wood grain either.

    -pubarso

    1. Re:woodgrain by Anonymous Coward · · Score: 0

      I have a wood grain desk and it works very well...

    2. Re:woodgrain by Anonymous Coward · · Score: 0

      My intellimouse works great on my oak ply desktop

    3. Re:woodgrain by chrisseaton · · Score: 2, Informative

      Works fine for me

    4. Re:woodgrain by Archfeld · · Score: 3, Insightful

      it is not the wood grain but the sealant that is most likely causing the problem. If the laser reflects, things go awry. A piece of graph paper works wonders. The double LED mice also reduce the skipping noticeably.

      --
      errr....umm...*whooosh* *whoosh* Is this thing on ?
    5. Re:woodgrain by Anonymous Coward · · Score: 0

      The only woodgrain that doesn't work is the fake woodgrain. It is actually a two-tone print with millions of tiny dots, so to the sensor, it looks the same everywhere, causing it to get confused.

  3. what about ultra-violet? by dirvish · · Score: 3, Interesting

    Can you use a black light?

    1. Re:what about ultra-violet? by meatspray · · Score: 2

      Not too sure about UV but most ccd's are sensitive to infra-red.

    2. Re:what about ultra-violet? by Anonymous Coward · · Score: 3, Informative

      UV LED light output sucks right now. There are severe materials limitations in their construction. However, if you had a bright enough UV LED, it should be possible. Just don't use IR. Si is transparent to IR, and this is most likely what the detector is made out of.

    3. Re:what about ultra-violet? by grub · · Score: 5, Funny


      Yeah, that would be smart. All over the world geeks would be getting major sunburns on their right palms. :P

      --
      Trolling is a art,
    4. Re:what about ultra-violet? by Angry+White+Guy · · Score: 4, Funny

      Goes with the friction burns on their left palms.

      Oh well, Karma suicide for a good joke....

      --
      You think that I'm crazy, you should see this guy!
    5. Re:what about ultra-violet? by binaryDigit · · Score: 5, Funny

      Yeah, that would be smart. All over the world geeks would be getting major sunburns on their right palms. :P

      Thereby ruining their sex lives.

    6. Re:what about ultra-violet? by Anonymous Coward · · Score: 0

      Try "unmeasurable sunburns." The led points down to the table surface. Yes, you were probably joking, but I'm not in the mood at the moment.

    7. Re:what about ultra-violet? by Anonymous Coward · · Score: 0

      Silicon CCD sensors are sensitive up to about 1100nm, although sensitivity drops significantly after 900nm. Using a IR LED would be fine--in fact the CCD chip is probably most sensitive to near-IR anyways.

    8. Re:what about ultra-violet? by Anonymous Coward · · Score: 0

      Si is silicon right?
      Then can you explain the "SILICON INFRARED PHOTOTRANSISTOR" (All caps because thats how google returned it)?
      http://www.google.com/search?num=20&hl=en&lr=&ie=I SO-8859-1&safe=off&q=Silicon+Infrared+Phototransis tor&btnG=Google+Search

      Silicon is sensitive to IR light. The housing of the phototransistor maybe transparent to IR light, but not the silicon inside. Plus they are using a red light already, now UV sensitive ones are also made, but (no "s) "Silicon UV Phototransistor" retuns about 180 pages, (No "s) "Silicon Infrared Phototransistor" returns 1390 pages on Google.

      I guess an advantage though of using UV is that you might be able to erase EPROMS if you used them as a mouse pad...(unlikly yea, but you never know how much power some people might put into the mice).

    9. Re:what about ultra-violet? by tps12 · · Score: 1

      Yeah, if you don't want children. Then again, you're probably like 95% of geeks and keep your cell phone hanging near your nuts all day already.

      Some people (Scott Adams of Dilbert and Hitchhiker's Guide to the Galaxy fame, notoriously) have claimed that humanity is evolving geekward, that brawn is becoming less common than brains as the Information Age increasingly selects for intelligence. But when you see how determined these geeks are to remove their genes from the pool, you have to wonder.

      --

      Karma: Good (despite my invention of the Karma: sig)
    10. Re:what about ultra-violet? by Progoth · · Score: 1
      Some people (Scott Adams of Dilbert and Hitchhiker's Guide to the Galaxy fame, notoriously)


      Scott Adams: Dilbert

      Douglas Adams: H2G2 (Deceased).

    11. Re:what about ultra-violet? by Anonymous Coward · · Score: 0

      wait, i dont get it, how does hanging your cellphone next to your nuts affect you at all? the only time a cell phone is emmting radation is when its transmitting. unless you talk on your cell phone right next to your nuts, i dont see a problem.

    12. Re:what about ultra-violet? by Anonymous Coward · · Score: 0

      Think about the position in which you hold it while talking out of your ass.

    13. Re:what about ultra-violet? by zbuffered · · Score: 2, Funny

      Speak for yourself, lefty.

      --
      Synergy is your friend
    14. Re:what about ultra-violet? by k_187 · · Score: 2

      Douglass Adams wrote the Hichhiker's Guide to the Galaxy. I'm picking nits but felt like pointing that out anway.

      --
      11 was a racehorse
      12 was 12
      1111 Race
      12112
    15. Re:what about ultra-violet? by drinkypoo · · Score: 3, Funny

      As opposed to the usual friction burns.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    16. Re:what about ultra-violet? by Anonymous Coward · · Score: 0

      The colorspectrum that the sensor of optical mice works well with drops off significantly after blue. So while blue should work fine, past that it becomes difficult for the sensor to detect. Infrared should work well though, but won't have any special effects like a blacklight.

    17. Re:what about ultra-violet? by dead_penguin · · Score: 2

      I figured this one out a few years ago by accident. I was playing with a video camera that had an IR remote control which I was using to start and stop recording. Since I was recording myself, the remote would be recorded at the start and stop of each segment. Whenever I was pushing a button, it looked (on tape) like there was a pulsating white light coming from the remote's "business end".

      --

      It's only software!
    18. Re:what about ultra-violet? by ep32g79 · · Score: 2, Funny

      What if you are left handed?
      W00t I'm safe!

    19. Re:what about ultra-violet? by Anonymous Coward · · Score: 0

      no because that means you use your mouse with your left hand.

    20. Re:what about ultra-violet? by Anonymous Coward · · Score: 0

      You aren't picking nits, you are correcting a horrible, glaring fuckup.

  4. logitech is blue... by b_pretender · · Score: 5, Interesting
    When I bought my Logitech optical a 1.5 years ago, I stopped at RadioShack on the way home to pick up a blue LED. I was planning to change it first thing when I got home.

    However, upon pluggin my mouse into the computer, the logitech logo and mouse in general glowed blue!!! I was happy. Although the LED on the bottom was red, they had an *extra* LED that was blue for the logo and the *glowing* plastic. That made my day and it involved NO soldering.

    1. Re:logitech is blue... by Pred · · Score: 1

      I assume you mean the Mouseman Wheel Optical. Its a shame they don't make them anymore (and you still pay full price if you buy from a retail store!) because its a great mouse. I wanted to get another for my new computer and had to settle for the uglier Intellimouse Explorer

      --
      "You all laugh because I'm different, I laugh because you're all the same."
    2. Re:logitech is blue... by Wiseazz · · Score: 3, Interesting

      I'm looking at my Microsoft optical now... it looks like it also has a seperate cosmetic led for the logo on the back... I may just try swithcing that out instead of risking the one used for tracking (there may just be one... I haven't taken it apart to check).

      An optical mouse is still a little expensive for me to experiment with. As in, my wife won't let me :)

      --
      My sig sucks.
    3. Re:logitech is blue... by EvilBudMan · · Score: 1

      We have 3 of these at work. I wish they still made them. I would like to replace my old ball mouse at home of the same shape. Both are good for shooters and fast gun CAD.

    4. Re:logitech is blue... by Verteiron · · Score: 2

      My IBM optical has that as well; the tracking LED is red, but the mousewheel glows a bright, even blue. I've never had a better mouse than this one.

      --
      End of lesson. You may press the button.
    5. Re:logitech is blue... by flippet · · Score: 1
      I was thinking the same thing about mine, but the plastic the LED shines through is red too, so I don't know how well it'd actually work...

      Phil, just me

      --
      "Cattle Prods solve most of life's little problems."
    6. Re:logitech is blue... by Wiseazz · · Score: 2, Informative

      Red + Blue = ....Purple? :) Hmm... don't know about that.

      --
      My sig sucks.
    7. Re:logitech is blue... by falzer · · Score: 1

      The plastic filter more or less only passes red light through. The normally bright blue light from a blue LED looks rather dim through the red plastic.

    8. Re:logitech is blue... by Urox · · Score: 2

      I bought mine from a computer store clearance sale. Either $5 or $10 (can't remember which). I'm sure if you hit up craig's list or some other such for computer clearances, you'll find what you're looking for.

      --
      "Would you rather have a playstation addicted dork wearing a star wars t-shirt?"
    9. Re:logitech is blue... by Anonymous Coward · · Score: 0

      I just bought a Kensington Optical mouse from circuitcity and it glows blue on the top. Make for a really nice night light. :)

    10. Re:logitech is blue... by evil_one · · Score: 1

      You'll find that the typical blue LEDs (5-6v) won't work in the Intellimouse optical - it only operates at 2.2v

      --
      Desperation is a stinky cologne
    11. Re:logitech is blue... by ProfessorPuke · · Score: 2

      I got a logitech optical mouse with the extra blue LED- and I hated it! Why? Two reasons: it increases the device's power draw for no good effect, and as a non-red light, it ruins your night-vision if its plugged in in a dark room (the underside light dims when not in use, but not the tail-light). That thing is bright!

      Some Microsoft mice also have a useless extra light on their rear, but at least its red, and at least its a simple ovoid shape, and not a sharply defined logo.

  5. No more red? by nogoodmonkey · · Score: 0, Offtopic

    But I kind of liked red. It wasn't my favorite color, but it was one of the better ones. :-(

    I wish it hadn't died.

  6. Fix for glass tabletops... by MyHair · · Score: 5, Funny

    although, the glass tops on tables does make using optical mice a pain there.

    Rub some sandpaper over the part of the glass where the mouse will be. Problem solved!

    1. Re:Fix for glass tabletops... by Ponty · · Score: 1

      Not for people who don't like their glass all gritted up =)

    2. Re:Fix for glass tabletops... by hands · · Score: 1

      What about taping a cool photo to the bottom of the table, under where you use the mouse?

    3. Re:Fix for glass tabletops... by FuzzyDaddy · · Score: 5, Funny
      Or maybe if you had some sort of special pad that went underneath your mouse...

      Oh, wait. Nevermind.

      --
      It's not wasting time, I'm educating myself.
    4. Re:Fix for glass tabletops... by Anonymous Coward · · Score: 0

      Why do you think he's suggesting that you scuff your own glass. You want to scuff the glass in the waiting rooms of the clients you call on when you are on the road!

    5. Re:Fix for glass tabletops... by Lochin+Rabbar · · Score: 1

      Cool photo under the glass doesn't work and if the photo is glossy the chances are it won't be too useful on top of the glass either. I settled for just using a bit paper which doubles as a scratch pad. I still like optical mice though, I always hated having to degunge the old ball and roller mice.

    6. Re:Fix for glass tabletops... by Shelled · · Score: 3, Informative

      That's what I use, two spare pieces of 8 x 12 inch grey matrix arborite, glued back to back to prevent warping and the edges rounded with a router. A very thin and flat mouse pad with a fine, random pattern which makes a perfect surface for opticals. Will never wear out and cleans with Windex.

    7. Re:Fix for glass tabletops... by dmanny · · Score: 1

      I do that. I have a picture of the bottom of my mouse.

      --
      All my previous sigs now look like this one, I wish they were permanetly recorded when used. :-(
    8. Re:Fix for glass tabletops... by Anonymous Coward · · Score: 0

      ROFL

    9. Re:Fix for glass tabletops... by Ponty · · Score: 1

      Silly, that only works if you own a glass-polishing company!

    10. Re:Fix for glass tabletops... by 91degrees · · Score: 1

      Just don't get one of those ones with one picture that changes as you move.

    11. Re:Fix for glass tabletops... by rworne · · Score: 2, Interesting
      Not so offbase after all. I went to the Apple Store for the release of 10.2 and they were handing out Jaguar-themed mousepads to all the customers. I asked the store manager why they were doing so, since Apple has released only optical mice for years now.

      All I got was a knowing smile and a shrug.

      What I do know from experience on my woodgrain desk, it that an optical mouse works VERY well on a mousepad compared to the normal desk where the cursor would tend to jump around a lot.

      I love my optical mouse mainly for the smooth tracking and the lack of "mouse smegma" that builds up on the balls.

      --
      I tried every decent and legal way I could think of to resolve the issue w/the business before I rented the chicken suit
    12. Re:Fix for glass tabletops... by InnereNacht · · Score: 2

      Even being like 1/8" off of a solid colored surface causes problems so a picture probably wouldn't work. Those things are awfully sensitive. You need almost direct contact with the surface for it to be useable. You could put the picture on top of the glass, but then why not just use a mousepad? ;p

    13. Re:Fix for glass tabletops... by Anonymous Coward · · Score: 0

      Are you stupid? What else was he suggesting if he wasn't suggesting you mess up the glass so the mouse can 'read it' properly? That makes it....that's right, a joke. Sorry it wasn't pointed out with a bit fat cheesy American style disclaimer, complete with flags and balloons and all that other bullshit you fat fuckers go in for, when you aren't bombing people you only armed a few years earlier. Jesus fucking christ on a pogo stick!

    14. Re:Fix for glass tabletops... by jandrese · · Score: 2

      I'll tell you why. When I have my optical mouse right on the desk here at work, it has a terrible slippery/grabby feel to it. It just feels rough. When I put it on this nice cloth mousepad I picked up at a tradeshow, it glides smoothly over the surface and feels much softer. The mouse is also silent on the pad, whereas it makes a scritch/scritch sound on the wood.

      --

      I read the internet for the articles.
    15. Re:Fix for glass tabletops... by Anonymous Coward · · Score: 0

      Actually, glass (silicon dioxide based table glass is not transparent to UV radiation. Otherwise we would all be tan in the cars and you wouldn't have to buy Quartz for your UV lenses.

      UV should work with a regular glass table since it would appear opaque. The only question is the very smooth surface and if that would have any effect.

    16. Re:Fix for glass tabletops... by ZHaDoom · · Score: 1

      Just use ducktape.

      ducktape is also very good to fix your windshield cracks.

      --
      War isn't about who's right. It's about who's left.
    17. Re:Fix for glass tabletops... by dead_penguin · · Score: 2

      Etched glass looks much nicer for table/desktops than clear glass, IMO. And it's much better for hiding fingerprints and other crud. Not that they'd ever install anything like that for us here at work... :(

      --

      It's only software!
    18. Re:Fix for glass tabletops... by MyHair · · Score: 1

      The only question is the very smooth surface and if that would have any effect.

      That is the exact problem and why sandpapering would help. However, it also makes the glass look crappy and therefore usually defeats the purpose of the glass.

    19. Re:Fix for glass tabletops... by Anonymous Coward · · Score: 0

      stop spilling mountain dew on your desk.

    20. Re:Fix for glass tabletops... by Gldm · · Score: 1

      Actually regardless of what type of desk I'm at, I always use my own mouse surface. I found a marble tile with a random fine grain speckle pattern that's been cleaned with pledge makes the best surface in terms of least tracking errors and friction when doing small movements. Oh and I can shoot like an aimbot in most FPSs with it too. :P

      --

      Introducing the new Occam Fusion! Now with sqrt(-1) fewer blades!

    21. Re:Fix for glass tabletops... by Anonymous Coward · · Score: 0

      Uh, dude, the parent's was a joke too. Go pretend to vote.

    22. Re:Fix for glass tabletops... by freaker_TuC · · Score: 2, Funny


      Don't you have any respect for your old network equipment ? Who uses a router "to round the edges" to put his mouse on? :)

      --
      --- I am known for the ones who want to find me on the net. Is that a privacy risk or a privilege? One might wonder..
    23. Re:Fix for glass tabletops... by Poison-R · · Score: 1

      Come to think of it... Marking off a section on the bottom-side of the glass, and etching it, would make for an interesting solution if done nicely. Heck - it might even work! (Sorry, I left my Physics PHD in my other pants)

      --
      PR
    24. Re:Fix for glass tabletops... by LordWoody · · Score: 1

      The mouse pad also keeps you desktop in good condition as the mouse will eventually wear off the surface finish.

      --
      Never meddle in the affairs of dragons,
      for you are crunchy and good with catsup.
    25. Re:Fix for glass tabletops... by HeX86 · · Score: 1

      Or tape/glue a mousepad on the bottom side of the glass. Then you don't have to worry about yoru mouse pad shifting around.

    26. Re:Fix for glass tabletops... by Anonymous Coward · · Score: 0

      The mouse pad also keeps you desktop in good condition as the mouse will eventually wear off the surface finish.

      Odd that you mention that as my table has kind of a shallow warped area where my mouse sits, it is slowly grinding its way through the table and eventually there will be a big hole there that the mouse will fall through.

    27. Re:Fix for glass tabletops... by shogun · · Score: 2

      Don't you have any respect for your old network equipment ? Who uses a router "to round the edges" to put his mouse on? :)

      Aaaah! I think that explains the mysterious downtime when the networking guys have just gotten some new furniture.

  7. Resolution by DrLudicrous · · Score: 5, Interesting
    I wonder if the resolution on these mice is at all wavelength dependent. If it were, than a blue LED would be superior to a red LED, since blue is at about 400nm and red is closer to 700nm.

    I do have to say that a blue LED mouse looks about 10X cooler than a red one. But it looks like this type of project will only interest serious modders who have some cash to spend.

    1. Re:Resolution by Anonymous Coward · · Score: 2, Interesting

      Ohotodetectors are primarily limited by the bandgap of their material. The bandgap of a Si or even a GaAs detector should be able to handle most optical wavelengths. Due to price limitations, I'm fairly certain that mouse manufacturers would choose to use a Si detector. They choose a bright red LED because that's cheaper than anything else out there too. GaInN blue leds are a little pricey, even in volume manufacturing.

      As long as you don't use an infrared or longer wavelength, you should be ok. Si is transparent to IR.

    2. Re:Resolution by Anonymous Coward · · Score: 0

      I forgot to mention, the detector is intensity dependent, so make sure you get a "high brightness" LED. This will ensure that the detector can reach threshold and provide the necessary signals to your computer.

    3. Re:Resolution by lirkbald · · Score: 4, Funny

      If you can move your mouse to a precision of 700nm, I'm very impressed :-)

    4. Re:Resolution by tulse · · Score: 1

      The gain in resolution you'd make (if the beam was being highly focused, which i doubt) would be sub-micron. I don't know about you, but my hands are pretty shaky. The improvement would make no noticeable difference Si photodiodes are good up until about 1000nm which is defintely IR.

    5. Re:Resolution by ch-chuck · · Score: 1

      only when your monitor is cranked up to 1,024,768,112 pixels per inch.

      --
      try { do() || do_not(); } catch (JediException err) { yoda(err); }
    6. Re:Resolution by MadCow42 · · Score: 3, Interesting

      Better yet, if the mouse was sensitive to 700nm movements, I'd be impressed if he could actually USE the thing...

      Let's see... 700nm would have to equal one pixel movement, right? That means that for a full 1280-pixel travel across the screen, he'd only have to move the mouse 0.896mm (I think). That's some pretty impressive motor skills!

      MadCow.

      --
      I used to have a sig, but I set it free and it never came back.
    7. Re:Resolution by Bas_Wijnen · · Score: 1

      I don't think it will have a positive effect. The idea is that the receiver can get the light you're sending. And I expect the manufacturers to have chosen their materials such that they get an optimal reception of the light they transmit. So if you put in a different colour LED, you are in a different (and since it was optimized worse) part of the reception spectrum.

      So it may actually increase the the accuracy in the case case it does receive the signal (which seems unimportant because of the little effect, as other readers say), but it might as well increase the time the mouse is "not reacting", because of bad reflection (or in this case, bad transmission).

    8. Re:Resolution by falzer · · Score: 1

      Let's see... 700nm would have to equal one pixel movement, right?

      Not necessarily. The mouse resolution unit is called the "mickey". At least, that's how I learned it.

    9. Re:Resolution by theLOUDroom · · Score: 3, Interesting

      If you can move your mouse to a precision of 700nm, I'm very impressed :-)
      I know I guy who could probably do this.
      He's a neurobiology professor.
      He says he used to be able to hold his hand steady to within one wavelength of light. I haven't seen it but, I bet it would be pretty impressive to watch. Of couse, without a nice microscope, you might as well not watch at all :)

      --
      Life is too short to proofread.
    10. Re:Resolution by karnal · · Score: 2

      Regardless of the beam used, you would ultimately have to have the SENSOR be more sensitive. The wavelength has little to do with the resolution (although, certain wavelengths probably work better with certain sensors....)

      --
      Karnal
    11. Re:Resolution by jonbrewer · · Score: 2

      I wonder if the resolution on these mice is at all wavelength dependent. If it were, than a blue LED would be superior to a red LED, since blue is at about 400nm and red is closer to 700nm.

      IIRC this wouldn't be too practical for cordless optical mice, as the blue would take more energy to generate the same amount of light. Any physics person want to support/correct me?

    12. Re:Resolution by lostchicken · · Score: 2

      He's full of it.
      The ground moves more than that, or I wouldn't have to use a very, very expensive pneumatic table for optics. And if the ground moves, you'd move too, right?

      --
      -twb
    13. Re:Resolution by Anonymous+Custard · · Score: 4, Insightful

      Let's see... 700nm would have to equal one pixel movement, right? That means that for a full 1280-pixel travel across the screen, he'd only have to move the mouse 0.896mm (I think).

      (Disclaimer: fuzzy math ahead)

      Who says the mouse hardware has to send a constant (not variable) motion:pixel signal? Lets assume it sends a 'move cursor' command once per millisecond. I (just now!) moved my mouse across my 1024 pixel screen, and it took about two inches (5 centimeters) of mouse movement, at default windows mouse settings. That's about 2.054 pixels per millimeter mouse movement. During each millisecond, a move of anywhere from 700nm-1cm could translate to a one pixel cursor movement, then 1.00000001cm - 2cm would be two pixels, etc. The sharpness would only come into play if someone managed to move it 701nm in less than one millisecond, it would still correspond to a one pixel movement, where as less accurate mice would not move the mouse at all.

      I don't think it matters whether your beam is 400nm or 700nm, unless it helps the laser track the mouse across non-optimal surfaces such as solid colors or glass. What may appear solid to a sensor at 700nm resolution could appear slightly patterned at 400nm, kind of like doubling magnification on a microscope allows you to find texture on surfaces which previously seemed flat.

    14. Re:Resolution by jafiwam · · Score: 1

      He was full of it if he meant visible light. Just having a pulse in one's body would preclude "less than one wavelength" of visible light. (400 ~ 700 nanometers)

      However, light comes in many wavelengths, including some used by people that comes in dozens of meters. (ELF transmitters for submarines, common radio, etc.) Natural astronomical sources probably make light in wavelengths of kilometers.

      Saying "within one wavelength of light" is meaningless unless you specify the wavelength or frequency of the light.

      He was fooling the audience, no better than the "Stick out tounge and touch nose" trick.

      (Hint: anybody can do it, stick out your tounge and touch your nose with your finger.)

    15. Re:Resolution by DoXaVG · · Score: 1

      Imagine playing Quake against a guy that only had to move his mouse .451mm to pull a 180 (nm the fact that he wouldn't be able to aim!). Try hitting that!

    16. Re:Resolution by anethema · · Score: 1

      Actually, this isnt really true. The CCD sensor that takes the snapshots of the tabletop responds better at to light at certain frequencies.
      I found a graph of responsivity vs wavelength for a standard ccd(made by Agilent, which almost all optical mice sensors are AFAIK.)It isnt my graph, I just found it on a mod page.

      You can see it here.

      As you can see, the CCD responds better to red than blue.
      Also, contrast is important to sense the differences between shots. This is done by angling the light from the LED as close to parallel to the surface as possible, done in my mouse with(This is called 'dark field illumination')
      Basically use a good bright blue LED, make sure it desnt drop more than your mouse can source, (usually 5v) and you should be fine.

      Yeah I did this mod myself, but I realized one problem. The bottom of my intellimouse explorer is translucent red plastic. That means it filters out everything but red. Since a blue LED makes almost perfect blue light, not just blue filtered white light, it almost doesnt shine through the plastic at all. I certainly dont have a glowing blue mouse bottom. Keep that in mind if you dont have clear mouse bottom plastic.

      --


      It's easier to fight for one's principles than to live up to them.
    17. Re:Resolution by Anonymous Coward · · Score: 0

      You'd probably experience a performance decrease when switching from Red to Blue. First because your photodiode sensor on your Red LED mouse is probably more sensitive to the Red end of the spectrum. Also unless you find a blue LED that has the same power ratings and specs as the Red one the manufacturer or the mouse used, the blue light might not be as bright and you'd lose intensity and therefore some responsiveness. I changed the LEDs on some of those dark blue logitech mice a few years ago. Created a nice set of Blue Green and Red mice, but the blue and green only worked on light colored surfaces. So only do it to your spare optical mice unless you don't care about performance.

    18. Re:Resolution by geesus · · Score: 0

      You could just up the sensitivty in Quake and turn off any mouse smoothing, and get the same effect. Its not the mouse that makes the wierdo, its his .cfg ;)

      --
      Gnome wasnt built in a day.
    19. Re:Resolution by Anonymous Coward · · Score: 0

      The wavelength won't make it more precise, however changing the LED colour can have an impact on how well your mouse handles different surfaces. CCD are most sensitive to the red spectrum (They dip into the infr-red as well). Which is convienant since red LEDs still have the highest intensity all things being equal (They may not look as bright as a blue LED, but our eyes aren't as sensitive to red, whereas the CCD is _more_ sensitive to red than other colours).

      So changing the LED to blue (Blue LEDs tend to border on the UV spectrum) may have a negative impact on your mouse's ability to distingish surface details.

    20. Re:Resolution by lostchicken · · Score: 2

      Good point.
      I'm pretty sure I can stay steady with in a wavelength of my cell phone's 'light'.

      --
      -twb
    21. Re:Resolution by neafevoc · · Score: 1

      do have to say that a blue LED mouse looks about 10X cooler than a red one.

      Does that mean blue is the new black?

    22. Re:Resolution by Anonymous Coward · · Score: 0

      Touch your nose... Reminds me of Bill Hicks! "Never have I been so drunk I couldn't find my fucking nose, etc, etc, etc."

  8. Black light by hero · · Score: 4, Interesting

    How about black light on a white mouse pad? That would be pretty nifty.

    -hero.

    1. Re:Black light by Anonymous Coward · · Score: 0

      In that case, you would want to order an ultraviolet LED. These are available from suppliers, but not without a waiver form from them. Apparently, they can cause cancer and 'sunburn' if you aren't careful.

    2. Re:Black light by hero · · Score: 1

      Interesting. I guess the "geek tan" would be changed from all white, to all white with a brown hand. What's so special about them that they can cause these problems? Clubs and bars use ultraviolet lights all the time.

      -hero.

    3. Re:Black light by Oliver+Wendell+Jones · · Score: 2

      Clubs and bars use ultraviolet lights all the time

      Most of the dancers don't keep any part of their body within 2" of the blacklights for any appreciable length of time...

      At least that's what I've heard...

      --
      A computer once beat me at chess, but it was no match for me at kick boxing -- Emo Phillips
    4. Re:Black light by Anonymous Coward · · Score: 0

      Is "nifty" nerd-speak for "annoying"? ;)

    5. Re:Black light by spike+hay · · Score: 2

      I get my tan from my blacklight cold cathodes in my case. ;-)

      --
      If you don't understand any of my sayings, come to me in private and I shall take you in my German mouth.
    6. Re:Black light by Anonymous Coward · · Score: 0

      White by it's self doesn't glow, it has to contain phosphors. the reason white clothes glow is because most laundry detergents contain phosphors to add an extra glow from the UV rays from sunlight.
      here's some more information:
      http://www.howstuffworks.com/black-l ight.htm

      on another note, blue LEDs tend to make things glow as well, blue is quite close to ultraviolet on the spectrum. I have a blue LED keychain flashlight that causes the effect.

    7. Re:Black light by hasse · · Score: 1

      > Is the quality of this cocaine satisfactory,
      > Mr. Delorian? Good as gold.

      Hehe. I just saw the Discovery program on Delorean. That hidden cam scene was so funny.

      The law enforcement guys just strolled in at low pace saying "duh, dude. we're from the fbi. and you're like busted. dude". And Delorean was like "oh man, I've got like ten kilograms of high quality cocaine on the table, and no time to pull a scarface".

      Not that it's fun to lose a lot of cocaine or anything. Just that scene.

  9. Blue? Blue's not cool! by Matey-O · · Score: 1, Redundant

    Now, a _blacklight_ led, THAT'D be cool! (Where's my disco ball and old skool rollerskates?)

    --
    "Draco dormiens nunquam titillandus."
  10. Optical Mouse on Glass Table? by CanisMajor · · Score: 1

    I used to tease cats with red laser pointers. Think of how they'd react to an optical mouse on a glass table...

    1. Re:Optical Mouse on Glass Table? by Anonymous Coward · · Score: 0

      I used to tease your mom's pussy with my cock.

    2. Re:Optical Mouse on Glass Table? by ch-chuck · · Score: 3, Funny

      The Laser pointer cat exerciser is patented - the owners have been notified and will contact you to arrange easy payment options.

      --
      try { do() || do_not(); } catch (JediException err) { yoda(err); }
    3. Re:Optical Mouse on Glass Table? by Psion · · Score: 2

      Don't be ridiculous. In saying "used to", the original poster is clearly laying a claim to prior art.

    4. Re:Optical Mouse on Glass Table? by Anonymous Coward · · Score: 0

      Careful ! You may be infringing US patent US05443036

  11. Glass Table Top? by Anonymous Coward · · Score: 0

    Do you live in the 80's? Does Don Johnson drive a Ferrari to your office? Glass Table Top!?!? Get some sense of function and style.

  12. Red/White/Blue... by monadicIO · · Score: 5, Funny

    Cool! I myself wanted to write a long FAQ about how to do an analogous thing for traditional mice. i.e. how to use a whiteboard marker to change the ball to match your decor.....but got bogged down by technical details...perhaps someone can help me...

    --

    The law of excluded middle : Either I'm foo or I'm foobar

    1. Re:Red/White/Blue... by irn_bru · · Score: 2

      Horrible Apple Mac Hockey-puck style mouse had a two-tone ball. Grey and White, If I remember (got rid of it pretty darn quick).

  13. Major Headline! by rjstanford · · Score: 2, Insightful

    Next on Slashdot, a complete HOWTO on adding those leftover red LEDs to your car's window washer nozzles.

    I mean, really. I know that we've been getting sillier lately, but this? Not exactly News for Nerds. Stuff that matters. Is it?

    In unrelated news, a Japanese study shows another link between computer use and health problems. But hey, that sort of thing just isn't as k3wl....

    --
    You're special forces then? That's great! I just love your olympics!
    1. Re:Major Headline! by Ageless · · Score: 2

      Here's what you do...
      Scroll down.

      Now wasn't that easy?

    2. Re:Major Headline! by IIRCAFAIKIANAL · · Score: 2

      From the article (in parent):
      The researchers urged more studies of the link between computer use and physical and mental symptoms.

      I always like to see this sort of thing. It helps reassure me that the group performing the study is trying to be responsible and not just scare people.

      (Personally, I'm more concerned that this story is probably a dupe than it being "unimportant to the readers of Slashdot", but anyway...)

      --
      Robots are everywhere, and they eat old people's medicine for fuel.
    3. Re:Major Headline! by Kidbro · · Score: 2

      I mean, really. I know that we've been getting sillier lately, but this? Not exactly News for Nerds. Stuff that matters. Is it?

      I wouldn't know about "Stuff that matters", but if it isn't "News for Nerds", then who's it for?

    4. Re:Major Headline! by jarvaTharpo · · Score: 1

      Yeah, it's no problem to scroll down. But, how do you now whether the story interests you? You have to read it! And if there were lots of uninteresting news, reading slashdot wouldn't be a pleasure anymore.

    5. Re:Major Headline! by kaden · · Score: 3, Insightful

      Perhaps because that study is bad science? It ignores the fact that people with the emotional/physical problems they describe are more likely to be internet addicts than the average person. They have proven no strong, general correlation, and it is akin to saying "Piloting a 747 makes you a very smart and focused person" when really, the people who are doing that usually already have those qualities.

    6. Re:Major Headline! by Anonymous Coward · · Score: 0

      Not need to troll just becuase your aritlce submission did not get accepted.

    7. Re:Major Headline! by viper66 · · Score: 1

      you mean this?

    8. Re:Major Headline! by Ageless · · Score: 2

      I guess I just treat it like SPAM. I read the subject. I read the first few lines if I have to and then I delete it if it's SPAM. The fact that I receive some SPAM doesn't reduce my pleasure at reading the good emails.

    9. Re:Major Headline! by Erik+Hollensbe · · Score: 2

      I just wonder what they do on major news sites, where probably a good 60% of the stuff they read is un-interesting to them...

  14. Which color works best? by Blimey85 · · Score: 3, Interesting
    Back when optical mice were still on the drawing board, was any testing done to determine which color offered the best performance or was red simply chosen because the creator(s) thought it looked cool?

    Personally I would rather have blue to match the blue case on my computer but the mouse that I have isn't all that responsive as it is and if it gets any worse, it wouldn't be usable.

    Maybe one of the mod sites could do a test to see which colors offer the best performance and which colors should be avoided.

    --
    How is it that one careless match can start a forest fire, but it takes a whole box to start a campfire?
    1. Re:Which color works best? by GigsVT · · Score: 2, Informative

      Red LEDs are the cheapest per mcd of brightness. That's it. Highly technical, I know.

      --
      I've had enough abrasive sigs. Kittens are cute and fuzzy.
    2. Re:Which color works best? by ivan256 · · Score: 2

      I'm guessing that red LEDs being the cheapest might have had something to do with the decision.

    3. Re:Which color works best? by cronot · · Score: 2, Informative

      Excerpt from the article:

      The reason for this is because the red light increases the contrast of the surface it is lighting up. The tiny camera used to take pictures in the mouse is able to see changes in the surface better, offering excellent responsiveness.

      So, I guess the red color wasn't choosen for nothing... :-P Indeed, the article says that the mod will only work fine if you use high-intensity blue LED's.

    4. Re:Which color works best? by Blimey85 · · Score: 1
      What aroused my curiosity is that I know the military switched from using infrared technology to infragreen for night vision because it worked much better. I don't know the specifics on why it worked better. Maybe a green led would work better than a red one if they both have the same brightness. I don't care much for green, and would deffinitely go with blue given a choice, but only if the performance is equal.

      I have several itellimice that I can play around with. Maybe I'll have to drop by Radio Shack later and pick up some various colors and see which ones perform better. How best should I determine the results of each color? Just my own opinion of which responds better or is there some (easy) scientific way to test the performance of a mouse?

      --
      How is it that one careless match can start a forest fire, but it takes a whole box to start a campfire?
    5. Re:Which color works best? by tzanger · · Score: 1

      What aroused my curiosity is that I know the military switched from using infrared technology to infragreen for night vision because it worked much better.

      I'm sorry, but infragreen? WTF is that?

    6. Re:Which color works best? by Randomlabs · · Score: 1

      There is no such thing as infragreen light on the electromagnetic spectrum. Night vision uses infrared light to "see" but, you see a green display. This dose not mean that since you see green it must be infragreen. By the way there is no ultragreen either only ultraviolet.

    7. Re:Which color works best? by Anonymous Coward · · Score: 0

      I assume you mean green shaded light in the night vision... The army uses green because the human eye can detect more shades of green than any other color. Or so the discovery channel would lead me to believe.

    8. Re:Which color works best? by saider · · Score: 1


      Green is used because the human eye is more sensitive to it. Red is used in machines because most detectors are most sensitive to the red area of the spectrum.

      --


      Remember, You are unique...just like everyone else.
    9. Re:Which color works best? by falzer · · Score: 1

      If I was making the decision, I would have put infradead or ultraviolent LEDs in the optical mice.

    10. Re:Which color works best? by Ubergrendle · · Score: 3, Funny

      Blue was rejected due to users making a possible inference to a BSOD.

      --
      John Maynard Keynes: "When the facts change, I change my mind. What do you do?"
    11. Re:Which color works best? by Urox · · Score: 2

      Green is used because the human eye is more sensitive to it. Red is used in machines because most detectors are most sensitive to the red area of the spectrum.

      Please back up your studies with links.

      My guess is that it is because green does not re-transmit as far in distance as red does. Red has a longer wavelength and so can travel further without absorption. You don't want your enemy to be able to see you as well, right?

      There was a study done about what would be better to use for star watching: green or red. The reason I recall (yep, no link here eather, but at least I don't make a sweeping statement to cover it) is that green was too close to night vision (for people who used filters instead of LEDs to look at their star charts) and would ruin most people's adjustments.

      --
      "Would you rather have a playstation addicted dork wearing a star wars t-shirt?"
    12. Re:Which color works best? by Anonymous Coward · · Score: 0

      There was a study done about what would be better to use for star watching: green or red. The reason I recall (yep, no link here eather, but at least I don't make a sweeping statement to cover it) is that green was too close to night vision (for people who used filters instead of LEDs to look at their star charts) and would ruin most people's adjustments.

      Have you ever been oustide at night? Red light is used for looking at charts because it does not kill your "night vision". And even then, the red light can not be very bright.

    13. Re:Which color works best? by pyite · · Score: 1

      Uhhhh. Results from google on "infragreen": 43. Results from google on "infrared": about 1,670,000. Results from google on "infrared" AND "infragreen": 5. You have made something up or are very confused. Infrared refers to energy given off by people at long wavelengths (read: body heat). Infragreen seems to only exist in video games and in the names of Windows virii.

      --

      "Nature doesn't care how smart you are. You can still be wrong." - Richard Feynman

    14. Re:Which color works best? by Blimey85 · · Score: 1
      Ah, my mistake. The green that is seen by the user has nothing to do with the underlying technology. It's still infrared but the what the user sees is displayed in green because I'm guessing that human eyes can adjust better between darkness and green than darkness and red? Does that make any sense?

      This past summer at one of the local fairs the National Guard had an outdoor area where you could look at some of their equipment and one of the things they were letting people try was night vision in a tent and the display was in green. I've also heard the term infragreen a few times (don't remember where) so I wrongly assumed that the newer night vision units used an apparently non-existent technology.

      My bad. The "your a stupid idiot" beatings may commence now.

      --
      How is it that one careless match can start a forest fire, but it takes a whole box to start a campfire?
    15. Re:Which color works best? by Idarubicin · · Score: 5, Informative
      Please back up your studies with links.

      Please stop being lazy and Google for it yourself. The original poster is quite correct. The human eye is most sensitive to green light. Going from red (632 nm) to green (532 nm) there is an approximately fourfold increase in sensitivity. That's why green laser pointers are starting to appear, despite their cost. Novelty value, certainly, but also because a laser pointer limited to a safe power is four times more visible in green than in red.

      My guess is that it is because green does not re-transmit as far in distance as red does. Red has a longer wavelength and so can travel further without absorption. You don't want your enemy to be able to see you as well, right?

      The eye can resolve finer variations in contrast and brightness in green than in red, as well--hence the use of green displays in night vision scopes. Incidentally, it doesn't matter at all what colour your night vision scopes' display is from the enemy's point of view. Night vision devices are almost always passive devices that collect existing light. As long as they are properly fitted, they aren't directing any radiation--red, green, visible, invisible--outward, so there's nothing to see.

      There was a study done about what would be better to use for star watching: green or red.

      For amateur astronomers, red LED flashlights are available. They are used because even a fairly bright red LED is perceived as relatively dim by the eye, so your eyes don't lose their dark adaptation every time you check your star charts.

      As an aside to anyone here who works with near-IR lasers...you know that a 200 mW diode laser at 670 nm (very red) looks no brighter than a 5 mW HeNe (red, 632 nm)--indeed, it looks quite a bit dimmer after all those burn spots start occluding your vision. Wavelength matters just as much as power when talking about perceived brightness.

      --
      ~Idarubicin
    16. Re:Which color works best? by spike+hay · · Score: 2

      Yeah but blue led's are the coolest per mcd of brightness.

      Red and green LED's look tacky. Remind me of those old calculators.

      --
      If you don't understand any of my sayings, come to me in private and I shall take you in my German mouth.
    17. Re:Which color works best? by Urox · · Score: 2

      Please stop being lazy and Google for it yourself.

      Please stop being ignorant as to think that all questions can instantly be found by guessing at google search terms.

      Incidentally, it doesn't matter at all what colour your night vision scopes' display is from the enemy's point of view. Night vision devices are almost always passive devices that collect existing light.

      So obviously you're thinking that the enemy is always from one directly. I'm guessing you'll never be on a survelance team. I was already aware that they only collect info, but most assuredly they output it through the viewer and such equipment does not always have a way to be fit or worn. It should have been obvious that the display was what was discussed.

      For amateur astronomers, red LED flashlights are available. They are used because even a fairly bright red LED is perceived as relatively dim by the eye, so your eyes don't lose their dark adaptation every time you check your star charts.

      Red LED flashlights are used because normal light used with red filters allows too broad of spectrum to reach your eye thus killing your night vision.

      --
      "Would you rather have a playstation addicted dork wearing a star wars t-shirt?"
    18. Re:Which color works best? by dacarr · · Score: 2

      An ultraviolent LED? I think if you get a bank of red LED's and make them into an array (such as a brake light on the back of your car), that would be very much an optic assault, but I don't think a single LED can do much damage.

      --
      This sig no verb.
    19. Re:Which color works best? by Urox · · Score: 2

      Neither red nor green should kill your night vision if you are using a single wavelength led. That is why astronomers are using led lights more often now days because the filters used over regular lights allowed too much broad spectrum light still. The broad spectrum is what kills your night vision.

      --
      "Would you rather have a playstation addicted dork wearing a star wars t-shirt?"
    20. Re:Which color works best? by Anonymous Coward · · Score: 0

      Everything I've seen with regard to night-vision in the Army is displayed in green, with the exception of the gunner's sight on the M2 Bradley which is displayed in red for some reason. The night vision devices detect infrared quite well, and most night vision goggles issued have an infrared "spotlight" on them that you can turn on to better illuminate the immediate area.

  15. Get a mousepad by alta · · Score: 0, Troll

    and quit whining about your glass tabletops.

    --
    Do not meddle in the affairs of sysadmins, for they are subtle, and quick to anger.
  16. Not so fine by L.+VeGas · · Score: 5, Funny

    I think I'm fine with what I've got - although, the glass tops on tables does make using optical mice a pain there.

    I thought I was fine with what I had too, until I got a glass tabletop... and started working without pants. Now I just cry every time I look down.

    1. Re:Not so fine by SB5 · · Score: 2, Funny

      At least you can see yours, well I can see mine too, but some nerds can even see them sitting down. Although when I sit down at my glass desk and then promptly look down I am proud that I don't have to resort to enlarging cremes or pills. Although as a fellow geek finding a good use for it besides use by myself is quite, lacking....

      --
      If what you are reading sounds funny, or sarcastic, lame, or stupid
      it is because it is supposed to be. just laugh
    2. Re:Not so fine by Anonymous Coward · · Score: 0

      That's where the Fresnel lens comes in handy...

    3. Re:Not so fine by Anonymous Coward · · Score: 0

      oooh, but that burns if your overhead light is too bright...

  17. Damn you /.! by El+Camino+SS · · Score: 4, Funny


    Aw, MAN! And I was just getting caught up on all of my ridiculous case modding and converting my Geo Storm into a Geo Storm "Type R"... ...NOW I HAVE TO CHANGE THE COLOR OF MY OPTICAL MOUSE TO GET PROPS AT THE DAMN LAN PARTY.

    (Like Heston) Damn you. DAMN YOU ALL TO HELL!

    1. Re:Damn you /.! by Anonymous Coward · · Score: 1, Funny

      That's a Geo Storm "Type R-GSX J-Type", buddy... don't forget the double-decker biplane wing of a spoiler, either. You'll need all that downforce to keep you from losing the back end around corners on that front-wheel-drive car.. You'll be the talk of the town at the local supermarket where all the other dropped-down sticker-tapers are stuck on the speed bumps..

    2. Re:Damn you /.! by Moloch666 · · Score: 1

      I always call some of my friends cases rice rocket computers. Most of them are half assed ugly unfinished cheap mods. On top of that they are the ones with a non-working computer 95% of the time. Funny, I have 99% track record for a working computer at LAN parties. 1% is usually just a particular game won't run correctly or not all.

      --
      Understanding is a three-edged sword. -- Kosh Naranek
    3. Re:Damn you /.! by Anonymous Coward · · Score: 4, Funny

      Geo Storm "Type R"

      You too? I got an extra sticker if you need it.

      (Like Heston) Damn you. DAMN YOU ALL TO HELL!

      Well, since he has Reagan Disease (Alzheimers), shouldn't that be more like: Damn you. Dam holds water. Sandwich ape! Gun go boom! Hello pill lady. PILL LADY IS MADE OF APES!

    4. Re:Damn you /.! by nolife · · Score: 4, Funny

      I have made some mods to my computer..
      I changed my case led's to show 133 when I actually only have a 100, a racing stripe on my burner, swiped an "Intel inside" sticker from a disply at Walmart and I hooked the 2940UW external led connector to the green power AND the yellow turbo light on the case front. Eventually I'll fire up Winbench but I figure I'm good for at least 60 more FPS in Doom..

      --
      Bad boys rape our young girls but Violet gives willingly.
    5. Re:Damn you /.! by glitch_ · · Score: 2

      >>(Like Heston) Damn you. DAMN YOU ALL TO HELL!

      >Well, since he has Reagan Disease (Alzheimers), shouldn't that be more like:
      >Damn you. Dam holds water. Sandwich ape! Gun go boom! Hello pill lady. PILL
      >LADY IS MADE OF APES!

      That is the funnies thing i've read in a long time!!! Thanks.

    6. Re:Damn you /.! by Anonymous Coward · · Score: 0

      And it's actually one of the least funny things *I've* read in a while. Huh, go figure.

  18. Cool looking, But... by CaffeineAddict2001 · · Score: 5, Interesting

    The problem is that this can seriously degrade performance.

    What I want to know is: Would it be possible to come up with a mod design in which it switches between red and blue? (Red when it's moving, Blue when it's idle)

    I noticed the light turns off when the mouse is Idle with my intellimouse, maybe this could be switched around a bit.

    1. Re:Cool looking, But... by monadicIO · · Score: 5, Funny
      Red when it's moving, Blue when it's idle)

      ..... and yellow if you should stop soon. Of course, you could just speed up insanely onto the next window before it turns red...

      --

      The law of excluded middle : Either I'm foo or I'm foobar

    2. Re:Cool looking, But... by Anonymous Coward · · Score: 0

      ...but then a little cordless mouse with a flashing blue LED on the top would come out and your hand would be banned from mousing for 6 months.

    3. Re:Cool looking, But... by Apreche · · Score: 1

      I have the logitech cordless mouseman optical. It can with a badass wireless keyboard too. You've probably seen it around its got all those fancy buttons and a volume dial. It was worth every penny. Anyway the LED in the mouse is red, but if the mouse isn't moving the LED blinks rapidly rather than being a constant on. I assume this is to save batteries. What's even cooler is if you wait a while the light still blinks, but less rapidly. Because it's wireless I don't think I'm going to fudge with the LEDs because it might mess with my battery life. But I'm sure someone can hack something together that makes the LED change colors rather than blink rapidly.

      --
      The GeekNights podcast is going strong. Listen!
    4. Re:Cool looking, But... by hamsterboy · · Score: 1

      Possible, but tricky.

      When my Logitech optical idles, the LED simply dims - it doesn't switch to a different LED, it just lowers the power output of the existing red LED. I suppose you could hack up some kind of voltage switch so that low voltage would power one LED and high voltage would power a different one, but I don't think there's that much space inside your mouse. :)

      -- Hamster

    5. Re:Cool looking, But... by ByteHog · · Score: 3, Interesting

      What about the Tri-color LED's? Have a certain color show for a given speed / acceleration, mouse clicks, etc... This one for example. No idea how this could be done, but it'd be damn cool.

      --
      - This isn't the sig you're looking for. Move along, move along..
    6. Re:Cool looking, But... by Anonymous Coward · · Score: 0

      The top of my Logitech MX700 flashes red when I've been choking the mouse for too long.

    7. Re:Cool looking, But... by Anonymous Coward · · Score: 0

      Shouldn't be too hard given a bicolour LED and an extra transistor to help out.

    8. Re:Cool looking, But... by k9nl · · Score: 1

      How about a voltage comparator and a little logic. I'm not sure what kind of power one has at one's disposal inside of a mouse but something tells me if there is room for the logic it can be done.

      I don't think I'd spend the time doing it though.

  19. As seen previously on slashdot! by Kraegar · · Score: 2

    In this post about the lego cryogenic mouse mod.

  20. Did you send back the FAQ on the Slashdot Effect? by RobertB-DC · · Score: 0

    'Cause that's what happened to the poor sucker... slashdotted before there were even a dozen comments posted. Poor sucker.

    --
    Stressed? Me? Of course not. Stress is what a rubber band feels before it breaks, silly.
  21. What about the detector? by P-Nuts · · Score: 2, Insightful

    I'd be worried that the detector might only be sensitive to longer, redder wavelengths. It would probably be worth checking on what component the mice use, and what its specifications are.

  22. Now all we need... by JohnnyBigodes · · Score: 1

    ...is a how-to on making a stroboscopic mouse-led. That combined with a dayglo-orange mouse pad and some black-lights would make for the coolest trance-party deejay-PC around!

  23. Article: Desoldering LEDs by MyHair · · Score: 5, Informative

    From the article: With the LED's now exposed, gently heat each side of the LED's carefully pulling on them until they are removed from the PCB. Take your time. This is actually the hardest part of the whole mod.

    This shouldn't be the hardest part of the mod. Solder-removal braiding and suction solder removers are cheaply available and highly recommended. Once you remove the solder, removing the LEDs is much easier and safer. (No flying hot solder!)

    1. Re:Article: Desoldering LEDs by trybywrench · · Score: 2, Funny

      I was tinning some wires once and flicked molten solder right in my tear duct. I thought I was going to die... but then i didn't and everything was OK.

      --
      I came to the datacenter drunk with a fake ID, don't you want to be just like me?
    2. Re:Article: Desoldering LEDs by Tim+Doran · · Score: 2

      Please mod parent [+1: Horrifying]

    3. Re:Article: Desoldering LEDs by DustMagnet · · Score: 1
      I work with a guy who is very near sighted. He solders by taking off his glasses and holding his eyeball less than two inches from his work. Drives me nuts. Some people calls him microscope eyes. Yes, he has gotten solder in his eyes and he still keeps doing it.

      On topic, I'm thinking of changing the decorative light on my mouse to a UV LED.

      --
      'SBEMAIL!' is better than a goat!!
    4. Re:Article: Desoldering LEDs by GeckoX · · Score: 1

      Don't.
      I made that mistake (thought it was blue, didn't read the label right at the shack), and they don't work at all.
      Nil, nada, zilcho.

      --
      No Comment.
    5. Re:Article: Desoldering LEDs by brxndxn · · Score: 1

      I thought that too... Until I used a solder-removal braid.

      If you use a solder-removal braid, it will take off ALL the solder left on the pin. If that happens, it will be hell to get something soldered back on without the existing solder there because it won't stick to the board. (even with tons of flux)

      But, if that happens, there's an easy fix. Just trace the connects back to the origin and solder wires there to the led connection.

      That's what my mouse has... ;)

      Though I messed up two others and plan on fixing them - I'll do that tomorrow.

      --
      --- We need more Ron Paul!
  24. Why? by FIT_Entry1 · · Score: 1

    The question begs to be asked. why?

  25. re: "Red is Dead" by soreno · · Score: 1

    You've just inspired me to do a cool CRT-mod. I will remove the ability to show red colors.
    That will make my desktop look very elite. Almost as elite as your mouse.

  26. Re:Don't actually do this! by EmagGeek · · Score: 5, Informative
    Red has a longer wavelength than blue.

    Blue has a shorter wavelength than red.

    The reason red LEDs are used is because they are the cheapest, as longer wavelength bandgap devices are easier to make.

    The exception to this logic is infrared, since LEDs are typically used for visual indication. Infrared LEDs are useless for this purpose so manufacturers don't make nearly as many of them...

  27. Hrmm... by vasqzr · · Score: 5, Funny


    How many Slashdot'ers does it take to change an LED?


    Answer: The ISP hosting the site is about to find out....

    1. Re:Hrmm... by Anonymous Coward · · Score: 0

      We already know, I just replaced his index.html. :P Didn't even put a dent in our bandwidth, but the server had a hell of a load on it. :)

    2. Re:Hrmm... by scot4875 · · Score: 2, Funny

      How many Slashdot'ers does it take to change an LED? Answer: The ISP hosting the site is about to find out....

      For some numbers:
      40% to remark on how cool it is
      30% to wonder "why would anyone want to do this?"
      10% to ponder the ramifications of attempting such a mod
      9% to point out others' spelling/grammar errors, even though they completely understood the post
      7% to warn about the dangers that this kind of a mod entails
      6% to go off on unrelated rants because someone said something that rubbed them the wrong way
      5% to note that they've already done it and how it changed their lives
      3% to make sure everyone knows that they got FP or link to goatse

      Yeah, it's 110%. But there are a lot of Slashdotters.

      --Jeremy

      --
      Jesus was a liberal
    3. Re:Hrmm... by Yert · · Score: 1

      This whole thing is wildly inaccurate. Rounding errors, ballot stuffers, dynamic IPs, firewalls. If you're using these numbers to do anything important, you're insane. That sums it up, I think. :)

      --
      Truck driver, plumber, Linux systems engineer.
  28. Re:Now if only by mark_lybarger · · Score: 0, Offtopic

    maybe once they find out that there is a 2.4 series kernel, it'll be a lot easier for them. i won't tell if you don't.

  29. I wouldn't suggest doing it... by delus10n0 · · Score: 5, Informative

    I did this on an older style Microsoft Intellimouse, using a light blue LED from Radio Shack. And they're not kidding about losing responsiveness. I couldn't play Counter-Strike anymore or any other games which required me to move the mouse quickly. The mouse would just lose tracking and the cursor would freeze on the screen. I swapped the original red LED back in, and what do you know, it works fine again.

    I don't recall the URL, but about a year ago someone did a comparison of about 10 different LED colors they tried in an optical mouse, and found that red is the best. (Duhh)

    --
    Not All Who Wander Are Lost
    1. Re:I wouldn't suggest doing it... by Glytch · · Score: 4, Informative

      Actually, if you'd read the article, they said that the mod would not lower responsiveness so long as you used a bright enough LED. Bright red LEDs just happen to be cheapest. That's why they're used most often in manufacturing.

    2. Re:I wouldn't suggest doing it... by Anonymous Coward · · Score: 0

      My setup is an ultrabright blue LED which replaced the red, and the internal shutter is overclocked to 8x its original.

      You can never lose my mouse. Even going as fast as you can move your arm will not make it lose tracking, while it will with an unmodified optical mouse.

    3. Re:I wouldn't suggest doing it... by awing0 · · Score: 1

      I have a blue intellimouse, I found that you have to use a white mousepad and it works fine. The blue doesn't work on dark surfaces well.

      --
      Cthulhu Saves.
  30. Comment removed by account_deleted · · Score: 1

    Comment removed based on user account deletion

  31. Red is Dead by ajs · · Score: 4, Interesting


    A great scene is a great film (and I presume a great play, but I was too young to see it at the time).

    The line is, of course, from The Wiz, which starred Diana Ross (Dorothy) Michael Jackson (Scarecrow) and Nipsey Russell (Tinman). My favorite song was "You Can't Win", which was sung by MJ. It's basically the three laws of thermodymamics, turned into a song about pessimism.

    The "Red is Dead" line comes from a scene were they first get to the Emerald City. Everyone's dancing around this huge city square that's all lit green. Everyone's actually wearing white, but because of the lighting it looks green. Then there's an announcement that green is no longer in and the new color is red. Lights change, everyone is in red, and the dance continues. A few minutes later, the announcement proclaims, "Red is Dead" and I think the color moves on to gold.

    This film was made at the hight of the disco craze, and Diana Ross was very much a part of it. I was kind of suprised to see her poking such fun at the whirling fashion trends that came and went in weeks in the late 70s.

    1. Re:Red is Dead by JUSTONEMORELATTE · · Score: 3, Insightful

      I fear you think too highly of this generation's memory
      Never attribute to cultural literacy that which can adequately be attributed to a simple rhyme.
      --

    2. Re:Red is Dead by digitalsushi · · Score: 2

      Even less serious than that, and I mention this link you've doubtless already visited due to your enjoyment of the thermodynamicness- http://artists.mp3s.com/artist_song/1391/1391522.h tml The sync is disturbingly good.

      --
      slashdot: where everyone yells sarcastic metaphors to themselves to understand the issue
    3. Re:Red is Dead by ajs · · Score: 2

      I was basing the assumption on the quotes around the phrase. Who knows :)

  32. The latest trends by porn*! · · Score: 1

    Somewhat interesting article about blue LEDs and the science that got us here.

    I'm green with envy, all you blue optical hipsters ;)

  33. I'm so tired about blues by denisbergeron · · Score: 1

    Everything is blues,
    all OsX icons are blues,
    all KDE icons are blues,
    all KDE themes are blues
    half gnome icons are blues
    half gnome themes are blues
    the sky is blue.
    the water is blue
    my tv screen reflection is blue
    my DVD screensaver is blue
    Help me my eye are blues !!!

    I'm very happy whit my mouse and the red led :-)

    --
    Ceci n'est pas une Signature !
    1. Re:I'm so tired about blues by Anonymous Coward · · Score: 0

      Half gnome? My half gnome is a level 50 thief with brown hair and brown eyes.

    2. Re:I'm so tired about blues by Capt.+DrunkenBum · · Score: 1

      Did you ever think that there might be a reason for all the cool soothing blue?

      --

      Not everyone deserves a 320i

    3. Re:I'm so tired about blues by loconet · · Score: 2

      Blue everywhere

      Yo listen up: here's a story
      About a little guy

      That lives in a blue world
      And all day and all night and everything he sees is
      Just blue like him inside and outside
      Blue his house with a blue little window
      And a blue Corvette and everything is blue for him
      And himself and everybody around
      'Cause he aint got nobody to listen: ...
      I'm blue (da ba dee),I'm blue (da ba dee)

      I'm blue (da ba dee),I'm blue (da ba dee)
      I have a blue house with a blue window
      Blue is the color of all that I wear
      Blue are the streets and all the trees are too
      I have a girlfriend and she is so blue
      Blue are the people here that walk around
      Blue like my Corvette it's standing outside
      Blue are the words I say and what I think

      Blue are the feeling that live inside me
      I'm blue (da ba dee),I'm blue (da ba dee)
      I have a blue house with a blue window
      Blue is the color of all that I wear
      Blue are the streets and all the trees are too

      I have a girlfriend and she is so blue
      Blue are the people here that walk around
      Blue like my Corvette it's standing outside

      Blue are the words I say and what I think
      Blue are the feeling that live inside me
      I'm blue (da ba dee),I'm blue (da ba dee)
      Just blue like him inside and outside
      Blue his house with a blue little window
      And a blue Corvette and everything is blue for him
      And himself and everybody around
      'Cause he aint got nobody to listen:

      I'm blue (da ba dee),I'm blue (da ba dee),I'm blue (da ba dee),I'm blue (da ba dee)

      --
      [alk]
  34. Red is for mood. by grub · · Score: 5, Funny


    The faint glow of a red light while looking at pr0n just seems natural.

    --
    Trolling is a art,
    1. Re:Red is for mood. by newr00tic · · Score: 1

      From now on, strolling along the mouse-section shelves in a computer store, you're technically in the "red light district"..

      --
      A horse can't be sick, you know, even if he wants to.
  35. Blue is the new Red by computer_redneck · · Score: 1

    Blue is great it is the new Red

    --
    "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." - BF
  36. Neat mod... by vasqzr · · Score: 2, Insightful


    I'm guessing red LED's are used in the first place because of the cost. I read somewhere that red LED's are pennies and blue LED's are like $2.00 USD each. I probably read that on the Internet so take it with a grain of salt.

    I'm wondering how many more blue LED's we can take. I remember the first thing I seen with them was the Sony PlayStation 2. If you go in to Circuit City or Best Buy, it seems like EVERY stereo, DVD player, TV, laptop, etc has blue LED's! I'm sure consumers like them, but I can see this fad passing soon.

    If anyone opens up an old optical mouse, the kind where you need a special mouse pad, make sure you don't remove the infared LED and replace it with a blue one :-)

    1. Re:Neat mod... by Spyky · · Score: 2

      I'm guessing red LED's are used in the first place because of the cost. I read somewhere that red LED's are pennies and blue LED's are like $2.00 USD each

      Yeah, Blue LEDs are more expensive, but they have come down in price since they were introduced. I think they are about $0.30 each in quantity, still several times more than Red and Green at pennies each.

      -Spyky

  37. Glass tabletop fix by LokiFoo · · Score: 2, Funny
    although, the glass tops on tables does make using optical mice a pain there.

    Tape a mouse pad under the glass top.

    1. Re:Glass tabletop fix by Anonymous Coward · · Score: 0

      Preach on, brutha! Burn the trailer parks to the ground!

    2. Re:Glass tabletop fix by LokiFoo · · Score: 5, Funny

      That is a sooo very typical White Trash solution. Good god, howtacky can you be? Hope you were just kiddin, otherwise I pity you and the trailer park from where you hail.


      Of course I was kidding, but you just gave me an idea. I can put the red LED's in the eyes of the pink flamingos out in my front yard...

  38. Re:NOT Resolution, Sensitivity. by Grog6 · · Score: 1

    The only problem is that the camera that is looking at the light coming back from the desktop is likely Si, (due to cost) which in most configurations has a sensitivity peak about 700-800nm. Blue LED's have a shorter wavelength. about 470nm for the ones I have, and Si photosensors have a very low response to light of this wavelength. (about 10:1 lower) This is likely to cause problems in the long run.

    But, Hey, if it works, it's definately cooler with blue than red.

    --
    Truth isn't Truth - Guliani
  39. Remember the /. rules.. by grub · · Score: 2


    .. when you spill solder all over your MS mouse circuit board and ruin it you have to:

    a) Call Bill Gates a poopy-head
    b) Tell everyone "if MS included a schematic, this wouldn't have happened."
    c) Repeat.


    Yes I'm joking silly. :P

    --
    Trolling is a art,
    1. Re:Remember the /. rules.. by jaymz666 · · Score: 1

      and I thought c) should be

      c) Profit!

    2. Re:Remember the /. rules.. by Anonymous Coward · · Score: 0

      Goddamn you cocksuckers and your "3) profit!" and all derivitives thereof, you've made me lose my faith in humanity.

    3. Re:Remember the /. rules.. by donutello · · Score: 1

      You misspelled M$.

      --
      Mmmm.. Donuts
    4. Re:Remember the /. rules.. by Anonymous Coward · · Score: 0

      1) Lose faith in humanity
      2) ???
      3) PROFIT!!!

  40. such a shame the author has can't type English by jaymz666 · · Score: 0, Flamebait

    OMG, this passes as a /. story? With all the spelling and grammatical errors included!

  41. The reason they use red... by GoRK · · Score: 5, Insightful

    Yes, red LED's are cheaper, but there is another reason, too.. They also want to use the cheapest CCD available. That's going to be a monochrome CCD that's sensitive to larger wavelengths. A red LED is going to work better on that.

    With that in mind, an Infrared LED would probably work great with optical mice and their cheap CCD's.. maybe even better than red. You might have to remove an IR filter from in front of the CCD, and be wary of using them in a room with flourescent lighting, but it'd be good to try. How cool is an optical mouse with apparently NO light?!?!

    If you want the "cool" blue look for whatever twisted ass reason, just use a blue LED and an IR LED in paralell. You might have to play with different led's/led voltages to get the right balance between a responsive mouse and the cool blue glow your riceboy heart desires, but again, it should work.

    ~GoRK

    1. Re:The reason they use red... by BeBoxer · · Score: 4, Interesting

      Works great. I've had an IR LED one of my mouse for quite a while now. It's hooked up to my jukebox PC which is out in the den. I got tired of having the mouse randomly flashing from dim to bright and back whenever it thought that maybe something was moving underneath it. It liked to do it the most when I was trying to watch movies. Dropped in an IR LED, and it works great. No more flashing.

    2. Re:The reason they use red... by radish · · Score: 5, Funny

      How cool is an optical mouse with apparently NO light?!?!


      About as cool as a 20 year old Sun optical mouse ;)

      --

      ---- Den ene knappen er powerknapp, den andre er Bender voice knapp "Bite My Shiny Metal Ass"

    3. Re:The reason they use red... by jellomizer · · Score: 4, Funny

      Of course you need the cool mousepad with the mouse for the Old Sun Optical Mouse.
      I remembered when someone told me about the "New" Microsoft optical mouse. at the time I was working on a Sun Workstation in the computer lab, and he was talking some junk on how inovative MS is. So basicly I turned the mose over that I was working with and showed him that it didnt have a mouse ball. Then I told him that this particular mouse is about 6 years old. Luckaly that shut him up and I was able to get to work.

      --
      If something is so important that you feel the need to post it on the internet... It probably isn't that important.
    4. Re:The reason they use red... by owenb · · Score: 1

      Actually, they're CMOS, not CCD.

    5. Re:The reason they use red... by JUSTONEMORELATTE · · Score: 2

      an Infrared LED would probably work great with optical mice and their cheap CCD's.. maybe even better than red.
      Kind of like some Logitech mice/trackballs do? (like the one on my desk right now?)
      --

    6. Re:The reason they use red... by Quixote · · Score: 3, Funny
      About as cool as a 20 year old Sun optical mouse ;)

      Oh, I have to tell this story. Some guys at work took a Sun to a trade-show. As luck would have it, they forgot to pack the mousepad that goes with one of those mice. It was a Saturday; they were in a far-away city, and none of the stores carried that pad. The demo was to start the next day, and we couldn't send them a mousepad that quickly.

      So what did they do? What all good engineers do: they improvised. They took mirror (bought at a local store) the size of the mousepad, and took some filament tape (used for packaging). They put the tape horizontally on half the mirror; vertically on the other half. To move the mouse, you would scan it on the 'horizontal' half till you got to the right row, and the 'vertical' half to get to the right column. Since the demo wasn't really _that_ mouse-intensive, it worked like a charm!

      Goes down in my book as one of the coolest hacks under crunch. I know, its off-topic, but the site is slashdotted and we need some idle conversation here.. :-)

    7. Re:The reason they use red... by Anonymous Coward · · Score: 0

      Why not just use a red and a blue and have a unique purple glow under your mouse :)

      Now that truly would be unique :)

    8. Re:The reason they use red... by Bo'Bob'O · · Score: 1

      Mouse Systems also used to make an optical mouse. This was many years ago, my mother had a mac Quadra. It was a three button mouse, that required a special metal mouse pad with a grid on it. So I assume sense it was a name brand mouse, it was around for PCs, too.

      The only problem is, the grid eventualy wore off the mouse pad, and so it lost a lot of accuracy.

    9. Re:The reason they use red... by 0x0d0a · · Score: 2

      Most of the good stuff MS sells is not made by them. They did not design the Intellimouse mechanisms (I believe that HP did the work for them). They do not write the *good* games that they publish (like Close Combat). They did not make their excellent fonts in-house -- those were contracted out for.

      Microsoft is one of the *least* "innovative" companies I can think of, though they do *distribute* a few nice items.

  42. Re:Why? by Unkle · · Score: 1

    I can't see the actual LED on my optical mouse (a basic Logitech), but the light does glow through the case, which is a translucent plastic. And it glows brighter while it's being used, goes dim when not in use (powersaving feature, I'm sure). However, I aggree that this isn't exactly news, especially since I saw this mod on a mod site (can't remember which one) nearly a year ago, and I think at that time it was already an old article.

    --
    Against stupidity, the gods themselves contend in vain.
  43. Cheap mouse to experiment on... by Wiseazz · · Score: 1
    --
    My sig sucks.
  44. red LEDs and mice by waldo2020 · · Score: 1

    Do you think that perhaps there is a reason that red works best ??? AFAIK opitcal mice work by imaging tiny features on the mouse surface onto 2d cmos ccd sensor. That means that the surface must be illuminated - so if the lens or sensor has a filter centered on the red LED spectrum, them any other color will work poorly at the filter dropoff.

  45. Re:Why? by SparkyMartin · · Score: 1

    To make your mouse look as cool? as all those Fast and the Furious wannabe cars you see driving around weekend nights with that eerie blue glow coming from underneath the chassis.

  46. Glass, titanium and natural fabrics by Anonymous Coward · · Score: 0
    Glass, titanium (expensive, yes, but ultrathin/light frames look beautiful), natural fabrics and real wood.

    No leather, synthetics or steel please. Unspeakably vulgar materials in furniture.

  47. Changing NOT recommended by Anonymous Coward · · Score: 0

    About 9 months ago I was looking into doing the same thing with my mouse. And, while I found all sorts of howtos and faqs, all of them indicated that there would be a loss in performance. One site even had a graph of wavelength vs optical reception, which indicated that the mouse was most responsive at 770 nm. I think the default red LED is around 700 nm. At any rate, it wasn't recommended to go under 650 nm.

  48. bumdass by Hubert_Shrump · · Score: 1

    I don't know... If the LED doesn't light you say "I need to reverse the leads". Now, that doesn't make any sense. Also, what's a "soder"?

    More cool. Yes, from the fiery bowels of /.

    --
    Keep your packets off my GNU/Girlfriend!
    1. Re:bumdass by Anonymous Coward · · Score: 0

      You need to reverse the leads because an led is a DIODE, and will only light under normal voltage if the current is biased the right way.

  49. I say orange.. by Angry+White+Guy · · Score: 2, Funny

    Orange is the new pink!

    --
    You think that I'm crazy, you should see this guy!
  50. Re:Now if only by Anonymous Coward · · Score: 0

    I agree, mousing over USB instead of PS/2 changed my life ;-)

  51. Optical mice hork down batteries by Dr.+Zowie · · Score: 3, Informative

    ... like there's no tomorrow.

    I have two Logitech wireless mice: one at work, one at home. I spend comparable amounts of time logged in both places (*sigh*). The one at home is a mechanical mouse, the one at work is an optical mouse.

    My optical mouse has been through five sets of AA batteries in the amount of time it took my mechanical mouse to finish off one set of AAAs.

    And you can't use rechargables, because these bad boys need the full 1.7 volts from those Alkaline cells -- the 1.3 from NiCd just won't cut it.

    That's just nasty.

    1. Re:Optical mice hork down batteries by Luxury+P.+Yacht · · Score: 1

      And you can't use rechargables, because these bad boys need the full 1.7 volts from those Alkaline cells -- the 1.3 from NiCd just won't cut it

      Hmmm... tell that to my Logitech Cordless Optical mouse which has been happily running on 2 AA NiMH cells for the last year. They've saved me a ton of money over what alkalines would have cost.

      --
      Bush should have died, not Reagan -- Morrissey
      Morrissey rides a cockhorse -- The Warlock Pinchers
    2. Re:Optical mice hork down batteries by kennylives · · Score: 3, Informative
      And you can't use rechargables, because these bad boys need the full 1.7 volts from those Alkaline cells -- the 1.3 from NiCd just won't cut it.

      NiCad? What is this, 1982?? Try high-output NiMH instead. I've got a couple of sets for my digicam (which will destroy a set of alkalines faster than it takes to fill a CF card), and they're great. See Steve's digicams for a rundown of what's out there.

      --

      Where the value of X-Mailer: is the true measure of a man...

    3. Re:Optical mice hork down batteries by rworne · · Score: 1
      Everything needs to eat, you should try optical mice with umbilical cords, they do make them you know.

      You would not need to eat either you you still had an umbilical cord instead of going cordless.

      --
      I tried every decent and legal way I could think of to resolve the issue w/the business before I rented the chicken suit
    4. Re:Optical mice hork down batteries by sheean.nl · · Score: 1

      Can't use rechargables? Maybe your old one cant't but something like this can.

      --

      If at first you don't succeed, then sky diving definitely isn't for you.
    5. Re:Optical mice hork down batteries by Anonymous Coward · · Score: 0
      tell that to my Logitech Cordless Optical mouse which has been happily running on 2 AA NiMH
      Nickel Cadmium != Nickel Metal Hydride so yeah, you can use NiMH rechargables, but his point about NiCads still stands.
    6. Re:Optical mice hork down batteries by SoupIsGoodFood_42 · · Score: 2

      Don't diss NiCads.
      LiIon and NiMH may be better for most applications, but neither is a replacment for really high-drain devices.
      You can drain a 7.2v 3000mA NiCad pack flat in 4 mins with no damage (they get very hot though). Try that with a LiIon and you'll be staring and a battery that's looks as if it's had a thermo-nuclar-meltdown.

    7. Re:Optical mice hork down batteries by Luxury+P.+Yacht · · Score: 1

      Nickel Cadmium != Nickel Metal Hydride so yeah, you can use NiMH rechargables, but his point about NiCads still stands

      BZZZT! Sorry, but Nickel Cadmium = Nickel Metal Hydride so far as voltage is concerned. Both NICAD and NiMH cells are rated at 1.2v when fully charged. A set of fully charged NICAD cells is just as capable of powering these mice as a fully charged set of NiMH cells. Volts is volts. There is, however, a big difference in amperage between these two types of cells. AA NICADS are typically rated at no more than 600-800mAh while the NiMH cells I have are rated for 1750mAh. They last plenty long in my mouse. I only have to recharge them once a month.

      --
      Bush should have died, not Reagan -- Morrissey
      Morrissey rides a cockhorse -- The Warlock Pinchers
    8. Re:Optical mice hork down batteries by pmw57 · · Score: 1

      That's why I dream of one day owning a cordless USB optical mouse with Docking Station.

      The cordless receiver is the charging unit that you put the mouse into, when you're not using it.

      There is no .sig

    9. Re:Optical mice hork down batteries by kennylives · · Score: 2
      Maybe. I'm pretty sure the NiCad will suffer damage after a number of those kinds of cycles. Shorting the contacts, in particular, will do awful things to most battery technologies. For real high drain, though, lead-acid is the way to go. That's part of the reason they're used in cars. The starter motor in a car presents a huge, short, high drain every time the car is started. Even NiMH and Lion can deal with moderatly high drains, making their use in laptops, cameras, and other similar applications preferable to NiCad.

      At any rate, the issue was with optical cordless mice. I don't count those to be nearly as high-drain as, say, a laptop, but they do seem to require certain voltage characteristics, and NiCad seemed an odd and inappropriate choice for that. A flashlight, maybe, but a mouse requires something more.

      --

      Where the value of X-Mailer: is the true measure of a man...

    10. Re:Optical mice hork down batteries by SoupIsGoodFood_42 · · Score: 2
      I'm pretty sure the NiCad will suffer damage after a number of those kinds of cycles.

      Nope, unless you talking into the 100's. Probably right about lead acid. But not really something you want in a R/C car or a drill.

      And yes, I know mice aren't high-drain devices :)
      Just dispelling the myth that NiCads no longer have a use.

      Although, on a note. I once saw a prog where they made a high-speed electric car made to run on those flat salt lakes where they go for all the land speed records etc. It used 100's or 1000's of ~C sized NiCads.

    11. Re:Optical mice hork down batteries by Trogre · · Score: 2

      The other good thing about roller-ball wireless mice is that the excess energy in the two opto-mechanical translation wheels can be stored in a NiCd/NiMH cell and used for RF transmission.

      Never need to replace your batteries!

      The only disadvantage I can think of would be that the increased drag of the generators would make the ball more likely to skid on smooth surfaces.

      I suppose with motion coils you could do the same with optical mice, but I doubt it would be as efficient.

      --
      "Nine times out of ten, starting a fire is not the best way to solve the problem." - my wife
  52. I'm going to try... by foistboinder · · Score: 1

    an octarine LED!

  53. You mean... by palad1 · · Score: 1
  54. Computer mods... by GnomeKing · · Score: 5, Funny

    Every time I see one of these articles, this one in particular, it reminds me of the blokes who spend thousands of pounds to put UV tubes under their cars

    However, the main difference I can see between the two is that when the car modders have finished, they drive around town and OCCASIONALLY some girl stops, thinks its cool, and gets in with them, while mouse modders can only use their accomplishment to click on "sign me up" for yet another porn site

    1. Re:Computer mods... by Fascist+Christ · · Score: 1

      some girl stops, thinks its cool, and gets in with them, while mouse modders can only use their accomplishment to click on "sign me up" for yet another porn site

      At least you can get free porn (as in speech and as in beer). That's two major advantages it has over real girls. For a third, who wants to risk pregnancy or disease anyway?

      --
      TodayTM BillyJoelTM GoogleTMd for StitchTMes due to WindowsTM while RollerbladeTMing with an AppleTM and a PopsicleTM
    2. Re:Computer mods... by thisisatest · · Score: 1
      some girl stops, thinks its cool, and gets in with them, while mouse modders can only use their accomplishment to click on "sign me up" for yet another porn site

      At least you can get free porn (as in speech and as in beer). That's two major advantages it has over real girls. For a third, who wants to risk pregnancy or disease anyway?

      Normal people?

      --
      You'd almost think a 'net company would know
    3. Re:Computer mods... by xipperhead · · Score: 1

      HAHAHAHAHAHAHAHAHAHAHAHA...
      oh my.

      http://xipperhead.com

  55. Logitech Mouse by Christopher_G_Lewis · · Score: 5, Informative

    Here's a link for the same mod with a Logitech Mouse.

    www.skybusiness.com/ntanner

    I've done this, and it works fine. Note that there are two Radio shack LED's that are blue, one that outputs 2600 MCD's at 4.5 volts, the other 300 at 6 volts. I used the brighter one, and have no skipping problems at all.

    Radio Shack

  56. Baloney. by TerryAtWork · · Score: 1

    If the mouse works, leave it alone.

    Just be glad your not running one of the ball ones, that vacuum up all the crap on your mouse pad and jam and skip.

    --
    It's Christmas everyday with BitTorrent.
  57. Re:Don't actually do this! by Tsar · · Score: 2

    Red light has the shortest wavelength possible, which is why it is used for mice. A small movement will then correspond to a large number of wavelengths, making tracking the mouse's position easier. If you switch to blue, the longest possible wavelength, your mouse will be essentially useless.

    Uh, wrong. Red LED's emit at wavelengths of 640-700 nanometers, while blue LED's emit in the 430-475 nm range. Red LED's are used because they're cheap and plentiful, not because they have the shortest wavelength.

    Besides, even a high-res, 1600DPI optical mouse only has to detect changes on the order of 625,000 nanometers, so any wavelength within the spectrum of commercially-available LED's will do, so long as the sensor will pick it up.

  58. Cool gadgets by Dstrct0 · · Score: 1

    I'm sure I read something a little while ago about an optical mouse where the LED(s) cycled through a bunch of different colours when it was idle, and when you moved it, it stayed on whatever colour it was cycling through.

    Anyone else remember this, or (even better) has anyone else tried one?

    --
    Build boards not bombs
  59. Blue LED? Nah!! by cerebralsugar · · Score: 5, Funny

    A blue LED doesn't help me get any work done. Sure, it may look cool and impress chicks, but even cooler would be an ALL KNOWING, ALL SEEING MOUSE, that wouldn't rely on me to push it around the mouse pad to get work done. It would do all the work for me because it would be that smart. And I would fall asleep during working hours.

    It would be pretty damn good at playing quake as well, much better than me.

    If I could find a mouse like that, well heck, then it could have a blue LED. Until then though, only red for it, until it gets smarter and starts doing some damn work for a change instead of just sitting there until I push it.

    --
    Easy guys, I put my pants on one leg at a time. The difference is after I put on my pants I make gold records!
    1. Re:Blue LED? Nah!! by Jugalator · · Score: 2

      A blue LED doesn't help me get any work done. Sure, it may look cool and impress chicks, but even cooler would be an ALL KNOWING, ALL SEEING MOUSE, that wouldn't rely on me to push it around the mouse pad to get work done. It would do all the work for me because it would be that smart.

      This seem to be related to a post I did on this topic. :)

      --
      Beware: In C++, your friends can see your privates!
    2. Re:Blue LED? Nah!! by Anonymous Coward · · Score: 0

      you see, this is why i don't do any actual work at work. i just sit there moding my mouse every day because i know someday i will have a super inteligent mouse that will do all my work for me.

      sure in the short term i may not get any work done, but in the long run this will make me more productive!

  60. Now do my phone... by e-town · · Score: 1

    I'd really rather see an article about changing the leds in my phone to blue. I'm pretty sure it wouldn't degrade the performance, and besides, I can't figure out where to put the leds in my Logitech MouseMan.

    --
    Signatures are for Nerds!
  61. water isn't blue. by Anonymous Coward · · Score: 0

    Water is not blue. It is clear and transparent.

    1. Re:water isn't blue. by Anonymous Coward · · Score: 0

      My toiled water is blue ;cb

    2. Re:water isn't blue. by Anonymous Coward · · Score: 1, Informative

      Water is not blue. It is clear and transparent.

      Read this.

  62. Mice are kinda like lightsabers for programmers by Xpilot · · Score: 5, Funny

    Sith (evil programmers) use the red ones. Blue, green and now purple are used by the good guys :)

    --
    "Backups are for wimps. Real men upload their data to an FTP site and have everyone else mirror it." -- Linus Torvalds
    1. Re:Mice are kinda like lightsabers for programmers by Jugalator · · Score: 5, Funny

      Sith (evil programmers) use the red ones. Blue, green and now purple are used by the good guys :)

      That would at least explain the reason for the LED's used by Microsoft mice. :)

      --
      Beware: In C++, your friends can see your privates!
    2. Re:Mice are kinda like lightsabers for programmers by Joe5678 · · Score: 3, Funny

      "I see you have constructed a new mouse. Your skills are complete. Indeed you are powerfull, as the Emperor has foreseen."

  63. Cached by aef123 · · Score: 2, Informative

    Here's a link to Google's cached version of the page so people can actually see it.

    http://216.239.37.100/search?q=cache:pYdsFS2ayMgJ: www.extrememhz.com/mouseled1.shtml+mouseled1.shtml &hl=en&ie=UTF-8

    --
    Where are we going, and why am I in this handbasket?
    1. Re:Cached by RazzleDazzle · · Score: 2

      I think that EXTREME MHZ does not describe the the website if it can't handle /. Maybe something like mediocremhz.com or maybe handful-of-mhz.com or something like that is more apporpiate.

      --
      ZERO ZERO ONE ZERO ONE ZERO ONE ONE! Just brushing up for my next big invention: Ethernet over Voice (EoV)
  64. Does it have to be a color? by JeanBaptiste · · Score: 3, Interesting

    Wouldn't an outside-of-the-visible-spectrum light work? The red gets annoying when playing at 4:am in the dark...

    1. Re:Does it have to be a color? by Madsci · · Score: 1

      Perhaps someone playing at 4 AM in the dark has larger problems than the colour of his mouse LED.

      --
      Your paranoia is about as subtle as the alien probe in your neck.
    2. Re:Does it have to be a color? by Anonymous Coward · · Score: 0

      use an infrared led, it is at a "better" wavelength than a red led. and you cant see it.

  65. Bah, they're not doing it right... by Jugalator · · Score: 3, Funny

    If they're going through all the trouble of changing the LED's to blue, why not change them into a superintelligent shade of blue!

    --
    Beware: In C++, your friends can see your privates!
    1. Re:Bah, they're not doing it right... by Microlith · · Score: 1

      Ok then, YOU get to explain what happens when you cross a Hooloovoo with Benny...

  66. Wavelength Response in Agilent Optical Sensors by Anonymous Coward · · Score: 0

    The optical sensor (outsourced to Agilent) that Logitech uses has a response dropoff at 750nm.

    \Data Sheet on Logitech Optical
    http://www.logitech.com/lang/pdf/optical_ white_pap er_91_EN.pdf?countryid=19&languageid=1

    \White Paper on Agilent Optical Sensor
    http://literature.agilent.com/litweb/pdf/5 988-2793 EN.pdf

  67. mirror by cetan · · Score: 2, Informative

    The site is still up for me but just in case, here's a mirror:

    http://home.attbi.com/~bernhard36/mouseled1.html
    http://home.attbi.com/~bernhard36/mouseled2.html
    http://home.attbi.com/~bernhard36/mouseled3.html

    though page one links to two and two to three fine on the mirror

    --
    In Soviet Russia...michael would be rotting in Siberia!
    1. Re:Mirror by alphatool · · Score: 0

      thanks.

  68. Just use a proper optical mouse... by JaredOfEuropa · · Score: 3, Interesting

    I have a Logitech optical/wireless mouse which works on just about any surface, such as:
    - My flat, smooth, featureless desktop;
    - The crap that usually sits on that desktop: plain printed paper, smooth & shiny take out pizza menu's etc.
    - My trousers, in case the desktop is too full to move a mouse over.
    - My cats! One is extremely black and short-haired, the other a multicolor longhaired one. The mouse works reasonably well on either of them, when one of them lies down on the only clear spot on my desk.
    - Wood grain of any description.

    Get a decent brand optical mouse, it is worth the higher price.

    --
    If construction was anything like programming, an incorrectly fitted lock would bring down the entire building...
    1. Re:Just use a proper optical mouse... by saskboy · · Score: 3, Funny

      The cats must love getting stroked by a mouse, *the wrong way*. ;-)

      I'd feel sorry for them if you are playing Unreal too.

      --
      Saskboy's blog is good. 9 out of 10 dentists agree.
    2. Re:Just use a proper optical mouse... by los+furtive · · Score: 2

      FYI Optical mice don't work well at all on glass, mirrors and some of those '3D' or 'holograph/shiny' style mouse pads. Kindof ironic considering the Microsoft optical mouse displayed at most stores sits on a mirror.

      --

      I'm a writer, a poet, a genius, I know it. I don't buy software, I grow it.

    3. Re:Just use a proper optical mouse... by Oliver+Wendell+Jones · · Score: 3, Funny

      I've got a Logitech optical mouse with iFeel haptic feedback (it vibrates), I doubt the cats would like that...

      --
      A computer once beat me at chess, but it was no match for me at kick boxing -- Emo Phillips
    4. Re:Just use a proper optical mouse... by Anonymous Coward · · Score: 0

      I have a microsoft optical mouse. works fine on shiny/mirror surfaces, such as the data (silver) side of a CD

    5. Re:Just use a proper optical mouse... by Jeremy+Erwin · · Score: 3, Funny

      I have a microsoft optical mouse. works fine on shiny/mirror surfaces, such as the data (silver) side of a CD

      Does the CD work after you've scratched it up after several hours of mousepad duty?

    6. Re:Just use a proper optical mouse... by Anonymous Coward · · Score: 0

      probably an AOL CD...

    7. Re:Just use a proper optical mouse... by Anonymous Coward · · Score: 0

      It works fine on a glass table in the dark, not quite as well with more ambient light.

    8. Re:Just use a proper optical mouse... by Anonymous Coward · · Score: 0

      Ok.. just moderated you as "CUTE"

    9. Re:Just use a proper optical mouse... by walt-sjc · · Score: 2

      Does the CD work after you've scratched it up

      With a new AOL CD in the mail every day, he got an endless supply.

  69. Okay... by Anonymous Coward · · Score: 0

    you guys worry about the color of the LED's in your mouses while the rest of us who still have jobs will worry about slightly more important things.

    Man, how pathetically superficial can you get?

  70. Re:Don't actually do this! by Lumpy · · Score: 2

    quite entertaining that a physics genius as you self proclaim knows nothing about light and wavelengths.

    Red and Infrared are the absolute slowest of the light and hence the longest wavelengths... this is why you get something called a red shift when objects travel away from you at high speed.

    Blue being just below violet and being at the top of the visible spectrum have the absolute shortest wavelength just before ultraviolet. This give you a blue shift for objects travelling toward you at high speed.

    Note when I mean high speed, I am talking about thousands upon thousands upon thousands of miles per hour.. none of this paltry human achieveable speeds... Being a physics genius you know this....

    the color of the light has nothing to do with tracking, nor does the optical mouse work anything like you think (read that as assume as you obviousally never looked up how they actually work). Please, please, oh please... if you want to have the audacity as touting that you are any kind of genius do not spew forth fecies.... it make you look bad.

    --
    Do not look at laser with remaining good eye.
  71. Activation Voltage by robertchin · · Score: 3, Interesting

    I don't understand how this can just work, you may be able to swap for a yellow or green LED, but a blue LED has a much higher activation voltage, which would mean that either the red LED was being overdriven, or there's a chip in charge of changing the voltage somehow because it was designed to handle other color LEDs as well. The blue LED should be really dim if the voltage is for a red LED (GaAS).

    1. Re:Activation Voltage by Anonymous Coward · · Score: 0

      IIRC the LED is driven at 5 volts. Depending on the exact circuit configuraiton, there is a current limiting resistor. Since blue LEDs drop a higher voltage than red LEDs, the voltage across the resistor will be go down, so the current passing through also goes down as you go from red to blue. Efficient blue LEDs still emit bright light at low current, like 1 or 2mA. It's either that or use a emitter-biased transistor configuration, where the current is regulated. No harm done.

      Some mice also change the apparent LED brightness by changing the duty cycle of the LED, and cycling it on and off rapidly. No worries there, either.

    2. Re:Activation Voltage by Anonymous Coward · · Score: 0

      Maybe the mouse modulates the LED using a current regulator instead of a resistor? Nah, that'd require too many parts.

  72. Gripe Gripe Gripe by ArthurDent · · Score: 0, Offtopic

    I see this as a troll, but it still needs to be addressed.

    How the heck did this get modded to 5? It's offtopic, and trollish. While I don't disagree that this story is not exactly the most important thing in the world, these sorts of things have been listed on /. for quite a while now. I'm a geek, and I was interested in the article.

    If you're not interested then ignore it, don't gripe to everybody else that you don't care.

    Ben

  73. One source for bright LEDs by ryanvm · · Score: 3, Informative

    Well, I've never bought LEDs from them, but I know they have a pretty good selection of VERY bright LEDs of practically any color.

    http://hosfelt.com/en-us/dept_54.html

  74. After reading this article... by Municipa · · Score: 3, Funny

    I am considering hanging myself by my cordless mouse.

    1. Re:After reading this article... by Anonymous Coward · · Score: 0

      Your probably dumb enough to make it work too.

    2. Re:After reading this article... by Municipa · · Score: 1

      No, too dumb for that.

    3. Re:After reading this article... by Idarubicin · · Score: 2
      Whoa! Sweet mod, dude!

      You put a cord on it!

      Does it still work?

      --
      ~Idarubicin
  75. TrackLED? by redNuht · · Score: 1

    Optical mice tech would be great if used in optical trackballs (or tracklights), it would be most useful on notebooks, since, so far, there hasn't been a decent internal pointing device on those.

    Of course, you could get blind without careful placement...

    1. Re:TrackLED? by Etrigan_696 · · Score: 2

      I'm using a Microsoft Trackball Explorer 1.0 PS2/USB optical trackball right now. The big red marble pops out of the frame and you can throw it around the office.
      The coolest thing about it is when I turn the lights in my office off - The ring around the ball glows, making the transparent red shell of the ball glow slightly - looks like I have the eye of sauron on my desk.

      go here for a review of the thing, with pics and all. I love mine. Keeps the shoulder from burining after a long day of waving a mouse around (bad shoulder, motorcycle accident)

    2. Re:TrackLED? by redNuht · · Score: 1

      Hmm, I was thinking about not using a ball at all, but running your finger over the light!

    3. Re:TrackLED? by Whatever+Fits · · Score: 1

      I saw this really cool trackball for the Amiga back in the day that had a clear ball and you could get different colored LEDs that would glow behind the ball. It was really cool looking. As you moved the ball the LED flickered. Really cool disco type of effect. Couldn't find a link too quickly as I forget who made the thing.

      --
      My name fits again.
  76. Another reason NOT to switch to blue by mamba-mamba · · Score: 3, Interesting

    Obviously this replacement worked for the story's author, but there is a technical point I haven't seen raised yet: Blue LED's have a much higher forward voltage drop than red LED's, and will often not turn on all the way in a circuit designed for red LED's.

    The typical red LED circuit is a resistor connected to 5 volts (sometimes 3.3) in series with the LED. The resistor limits the current that can pass through the LED. The value of the resistor is based on some typical forward voltage across the LED. That is, the 5 volts will end up being partially across the resistor, and partially across the LED. The resistor is calculated so that the typical voltage drop will yield the desired current.

    The voltage drop on a red LED is about 1 or 1.5 volts or something (I don't remember exactly) but blue LED's ca drop around 3 or 4 volts (IIRC). This throws off the calculations used in selecting a current-limiting resistor for the typical (red) LED circuit. A 3.3 volt circuit might not even turn a blue LED on at all.

    The best way to turn on a blue LED is to put it in series with a simple current source (this can just be one matched pair of transistors with a current setting resistor on one of them) or, when possible, to use 12 volts with a current-limiting resistor in series.

    Green and yellow are close enough to red that they don't pose a problem.

    MM
    --

    --
    By including this sig, the copyright holders of this work or collection unreservedly place it in the public domain.
    1. Re:Another reason NOT to switch to blue by Mage+Powers · · Score: 1

      Simple current source being the USB power itself?
      My bloo mouse is a radioshack bloo led and a resistor hooked up to 5volts and ground.

      Red Green and Yellow are close because its basically the same technology.

    2. Re:Another reason NOT to switch to blue by mamba-mamba · · Score: 2

      First of all, if you have a setup that works, then I would say that's great and stick with it. Don't change something that works on account of my comment.

      But to answer your question, the USB power is not a current source. It is a voltage source. It is designed to stay at 5 volts and supply more or less current (up to some limit) if necessary to maintain that voltage.

      A resistor in series with a voltage source is a sort of crude current source, but it is highly dependent on the load. That's why it might not work if you simply switch LED's. Ideally you should at least re-calculate the resistor value if you change from a red/yellow/orange/green LED to a blue one. The resistor value will be smaller for a blue LED.

      A "real" current source would be designed to maintain some current, and raise or lower the voltage as necessary (within some limit) to maintain that current.

      The simplest transistor current source is a matched pair of transistors in a configuration called a current mirror. You would have the matched pair, one resistor to set the current, and the LED as a load.

      It is a bit tricky to describe without a diagram, but here is a url:
      http://www.ee.umd.edu/~bassel/man/lab6edit/n ode3.h tml

      In the picture, the 10k resistor is setting the current to 1mA ((10.7V - 0.7 V)/10k=1mA) and R2 is acting as a load. No matter what the value of R2, the current through it will be 1mA. Naturally this is only true over some range. When R2 is greater than 10k, for example, it no longer works.

      If you were to use this for a blue LED driver, you would put the LED where R2 is, and use 5 volts instead of 10.7, and calculate a new value instead of 10k. If you wanted 20 mA, for example, you would use (5V-0.7V)/20mA = 215 Ohms. So you could use 220 or 240 instead of 10k.

      The 0.7 V is subtracted to account for the voltage drop from base to emitter in the transistors. This is an estimate, but it is close enough for what we are doing.

      MM
      --

      --
      By including this sig, the copyright holders of this work or collection unreservedly place it in the public domain.
  77. Why make, when you can buy... by protohiro1 · · Score: 3, Interesting

    I ran across this . Its a really cool mouse that has 24(!) user selectable LED colors. You change the color by hitting a switch on the mouse. Now that's cool. Next is to have a red, green and blue LED with variabe instensities...

    --
    Sig removed because it was obnoxious
  78. Red is more efficient by distributed.karma · · Score: 2

    Red was the color of the first LEDs, which is why it's still the cheapest (though marginally). Therefore they also have the longest development history. More importantly, long-wavelength semiconductors are usually more efficient -- not that this makes any difference in desktop systems though.

    --

    --
    If you moderate this, then your children will be next.

  79. In other words... by andyf · · Score: 5, Funny

    In other words, this article is: Slashdot - How to Change a Lightbulb!

    --

    Photos of bits of the past hiding in the present: afiler.com
    1. Re:In other words... by fobbman · · Score: 2

      With all the jokes out there I'm quite proud to see that it only takes one of us, unlike Microsoft executives who instead declare darkness as the new standard.

  80. Sorry by Anonymous Coward · · Score: 0
    I had more planned for this but I got rushed. I spent more time than I wanted to googling for which color really is shortest because I can never remember.

    I suck.

  81. Turning off the auto-dim by Dungus · · Score: 1

    What I want to do is make my Logitech Wheel Mouse Optical not dim after being idle for 1 second. Anybody have any suggestions?

    1. Re:Turning off the auto-dim by Anonymous Coward · · Score: 0

      Get a pager vibrate motor and wire it into your mouse.

  82. Re:Don't actually do this! by Anonymous Coward · · Score: 0

    He's not a physics genius. He's a troll, started by some guy on Kuro5hin a while ago. Go ahead and check his previous comments; they're all trolls.

  83. Blue by mbbac · · Score: 2, Funny

    Blue is the new high-tech color. As well as titanium. I read that somewhere.

    Must be because of the new PowerBook and Aqua. ;)

    --

    mbbac

  84. Where to buy ultrabright LED's? by Chicane-UK · · Score: 3, Interesting

    I have just checked around some of the well known UK suppliers (Maplin Electronics and RS Electronics) to find these ultra bright LED's in blue, but I will be damned if I can find em.

    The very brightest I saw was 2000MCD - and that was being sold as the highest brightness at nearly $7US for a single LED.

    Suggestions on where to buy from please?

    Thanks!

    --
    "Hey! Unless this is a nude love-in, get the hell off my property!!"
    1. Re:Where to buy ultrabright LED's? by Anonymous Coward · · Score: 4, Informative

      Hello,
      Yes, the hosting company shut down the site temporarily. Crippled their server. Sorry guys...I tried to keep it up.

      About the LED's used in this mod...
      They are from superbrightleds.com (go figure huh?) hehe

      You need them that bright in order for them to work properly. Hope this helps!

    2. Re:Where to buy ultrabright LED's? by ryanvm · · Score: 2

      Try Hosfelt. The second product listed is a 6000 MCD blue LED.

    3. Re:Where to buy ultrabright LED's? by Chicane-UK · · Score: 1

      Excellent.. thanks for those links. I have a friend in the USA so I will ask him nicely to post me a few over!

      Cheers!

      --
      "Hey! Unless this is a nude love-in, get the hell off my property!!"
    4. Re:Where to buy ultrabright LED's? by rupert2000 · · Score: 0

      www.jameco.com might have some that would work

    5. Re:Where to buy ultrabright LED's? by rupert2000 · · Score: 0

      Here are some more direct links: https://www.jameco.com/cgi-bin/ncommerce3/ExecMacr o/jameco/pageDisplay.d2w/report?content=catalogol https://www.jameco.com/Jameco/Products/ProdCT/p030 .pdf

  85. Slashdotted by Whomever · · Score: 1

    When I tried to look at the mod, I received this message:

    "This site is shutdown temporarily due to the slashdot effect."

    First time I've seen a response rather than a timeout when someone was slashdotted.

    --


    ----------
    perl -e 'print(pack("H*","646176652e7761676e657240676d6169 6c2e636f6d0a"));'
    1. Re:Slashdotted by RedWolves2 · · Score: 3, Interesting

      It is not the first. I saw one site last month check the site referrer and if you came from Slashdot it gave a message to "Go Away!"

    2. Re:Slashdotted by Mr.+No+Skills · · Score: 1

      Good luck:

      "This item is not stocked or has been discontinued."

      --
      Sleep is for the Weak
    3. Re:Slashdotted by RedWolves2 · · Score: 2

      Yeah but you get the idea I want a Tablet PC.

  86. hmm - imagine that... by Dukebytes · · Score: 1
    "This site is shutdown temporarily due to the slashdot effect."

    Now if they just had a beowulf cluster of those blue mice...

    Duke

    --

    FreeBSD: Nothing runs like a daemon with a pitch fork.
  87. Any Mirrors? by girish · · Score: 1

    "This site is shutdown temporarily due to the slashdot effect."

    man, couldn't they just provide a list of mirrors instead?

    1. Re:Any Mirrors? by Anonymous Coward · · Score: 0

      This site is running of a $6/month hosting plan, for that price, when you get slashdotted, you get shut down. I only replaced his index page and notified him though, he's welcome to put the index page back with a list of mirrors if he sets them up.

  88. Dirty Hemos by Anonymous Coward · · Score: 0

    I think I'm fine with what I've got - although, the glass tops on tables does make using optical mice a pain there.

    "There"? Is he talking about what I think he's talking about?

  89. /. effect. by 42forty-two42 · · Score: 1

    Anyone gt a mirror?

    1. Re:/. effect. by Anonymous Coward · · Score: 0

      Don't you know? Optical mice are no good on mirrors. :)

  90. Google Cache by Anonymous Coward · · Score: 0

    http://216.239.51.100/search?q=cache:pYdsFS2ayMgJ: www.extrememhz.com/mouseled1.shtml+mouse+led+site: http://www.extrememhz.com&hl=en&ie=UTF-8

    a hrefs are for the weak

  91. Blue = Legacy. by DigitalAdrenaline · · Score: 1
    Blue is Microsoft's Color. Therefore, blue is the color of choice for legacy users, and legacy equipment.

    Red would be Novell's Color. And Netware still rules, even if their marketing sucks (do they have any?) It'll be another decade before anything works as well as NDS.

    I'm not sure how to get Black, Yellow, and White lights on the thing to symbolize Tux. But judging by how much my kids like the penguin, I'm sure there's a market for a mouse that looks like a penguin, or a mouse that shines a penguin beneath itself like a Batman Signal shining into the night... Heck, they could flip the thing upside down, and it could double as a nightlight.

    1. Re:Blue = Legacy. by Anonymous Coward · · Score: 0

      In case you haven't noticed. blue is the (default) color of Gnome, KDE and OS X as well!

      Idiot.

    2. Re:Blue = Legacy. by Urox · · Score: 2

      Blue is Microsoft's Color. Therefore, blue is the color of choice for legacy users, and legacy equipment.

      Uh, blue is IBM's color and has been for quite a while. Ever hear of "big blue" or "Deep Blue"?

      --
      "Would you rather have a playstation addicted dork wearing a star wars t-shirt?"
    3. Re:Blue = Legacy. by Anonymous Coward · · Score: 0

      Hey, the Amiga had a blue desktop before anybody else. HAH.

  92. cached copy from google by klparrot · · Score: 1
  93. I've had a not-red LED in all my optical mice. by PaybackCS · · Score: 2, Interesting

    I've always changed them. Some of the fun color's I've used: The logitec dual-sensor: blue and gree Old logitec optical (with blue glowing logo): white New logitec opticals: blue And one more I did just to see if it would work: an Infrared LED (from a remote control) in one of the newer Logitec opticals. It's great, make people think that your mouse's light is burned out, but somehow still works fine.

  94. Blue is Cool - here's an article on why! by swordboy · · Score: 5, Interesting

    I do have to say that a blue LED mouse looks about 10X cooler than a red one.

    Here's Why

    After reading this article yesterday, I pondered changing the LED in my mouse. Has slashdot implmented some sort of psychic cookies or something?

    --

    Life is the leading cause of death in America.
    1. Re:Blue is Cool - here's an article on why! by jyang · · Score: 1

      It make sense. The color of cool is moving consistently to the shorter wavelength as progressive goes on. Future generations might well find blue color so "tacky".

      The glowing aliens are probably that way because all their cellphones emits gamma rays. They are hairless too, just like after chemotherapy.

      --
      --- You make things foolproof, and they'll find you a damn fool.
    2. Re:Blue is Cool - here's an article on why! by Anonymous Coward · · Score: 0
  95. Just wait the fad out... by Professor+Oompa · · Score: 1

    In a few years all red leds in new products will be replaced by "cool" blue ones. Red will be the new blue, and you will be cool once again with your crappy old red led.

    Even better, just hold on to your old non-optical mouse and everybody will be in envy of your retro-look mouse!

  96. Night Vision by cybermace5 · · Score: 3, Funny

    The obvious reason NOT to do this.

    On submarines and ships, they used to have only red lights inside when it was dark (or the person who had to go outside would wear red goggles inside). This was to preserve the ability to see detail in the dark. The eye's light sensors are able to recover quickly from red light, less so from other wavelengths.

    Remember this at your next dimly-lit LAN party, where you've modded your computer and mouse with blue LEDs. And don't blame me when you trip and fall on the way to the fridge for another Mountain Dew. Or get fragged by someone you never saw, because your dark sensitivity was diminished after staring lovingly at your glowing blue mouse during respawn.

    --
    ...
  97. nice mod... by stevewm · · Score: 3, Interesting

    This is a cool mod to do if you have a mouse with clear sides :D (The $12 Logitech model B12 comes to mind..)

    On my Logitech B12 I desoldered the factory LED, and put in its place a cut in half CD-ROM passthrough cable plug. I then went and bought 1 of every color LED that http://www.superbrightleds.com sells. When I want to change colors I just pull the LED leads out of the plug and pop it out of its plastic holder/lens.

    I've measured the voltage being delivered to every color LED when in the mouse: Aqua (max Vf 3.6), Blue (Vf 3.5), Green (Vf 3.5) and White (Vf 3.4) all get 3.35-3.5v Red (Vf 2.2), Yellow (Vf 2.4), and Orange all get 2.3v

    All of these LEDs are rated 5000mcd and above.

    Every color tracks just like the factory Red LED. And in some cases better! The White, Blue, Aqua and Green LEDs track much better on shinny surfaces. On the same surface Red, Yellow, and Orange LEDs just make the cursor jump around.

  98. Blue LEDs are sooo 2k1. by Xel · · Score: 1

    Really though, arent people getting as tired of blue LEDs as they did of red?

    Im waiting until yellow catches on. Ya dont see any yellow LEDs, do ya?

    --
    "Eagles may soar, but weasels dont get sucked into jet engines."
  99. How can a site named "extrememhz.com"... by Call+Me+Black+Cloud · · Score: 4, Funny

    go down so fast? This site is shutdown temporarily due to the slashdot effect.

    I suppose "extreme" could refer to minimum.

    1. Re:How can a site named "extrememhz.com"... by Violet+Null · · Score: 2

      Just remember -- caching is bad, it wouldn't help Slashdot, and it would hurt the server owners.

    2. Re:How can a site named "extrememhz.com"... by Minna+Kirai · · Score: 1
      That FAQ is bad. The answer is incomplete and outdated. Sure, there's "complicated issues to work out"- but Slashdot has paid employees, work em out already? This site is one of the highest traffic webpages, with an audience involved in the future of internet infrastructure. It would be a perfect place to experiment with solutions to some of these problems.
      • There's this thing called hit forwarding. The cache can still serve the requested file, while informing the original server that someone is viewing it.
      • Alternatively, slashdot editors could use an "opt-in" cache service. When an editor decides to post a story, he could send an email to the webmasters listed on the site. The mail contains instructions on how to automatically enable a slashdot-hosted cache of your linked pages (for a 12 hour period only). Many small web publishers would prefer this option.
      • If neither of those is done, at least they could detect an overloaded site and stop presenting links. Basically, slashcode could recognize several different kinds of server error messages, and check the links every 10 minutes (during the first 24 hours of the story). If the site appears to go down, then the links could change from real links to ones giving a slashdot page where the actual URL is printed (but nonclickable).
  100. Kits by RailGunner · · Score: 2
    "This site is shutdown temporarily due to the slashdot effect."

    You'd think they'd *want* a bunch of geeks reading this.

    Maybe they could sell kits to change the LED color on your mice to recoup the bandwidth cost of a good slashdotting.

  101. Blue LED's by KoshClassic · · Score: 1

    I have a small travel mouse from PCAlly - they also make the same thing for the Mac under the name MacAlly. The cool thing about it is that the entire shell is made out of the same type of clear plastic that Apple uses on the G4 towers, so the LED makes the whole thing glow red. Its a neat effect. It probably helps that they use a red circuit board as well, but it would be cool to see it glow blue :)

    --
    Understanding is a three edged sword. - Ambassador Kosh Naranek, Babylon 5
  102. Simple test by Shaddup · · Score: 1

    I just tried out a simple test. I held up my TV's remote to my Logitech optical mouse's bottom and held down some of the buttons. Sure enough, the on-screen cursor started jumping in a particular direction. Looks like IR works fine. Kewl, huh?

    1. Re:Simple test by fenix+down · · Score: 1

      That's a good idea! If you have one of those blue led keychain things, you can try out how well the mouse recognizes the color. Finally found a use for all these light-up keychains I buy at museum gift shops.

  103. You think that's cool? by mboedick · · Score: 1

    Check out Project Cryo.

  104. Yellow is sooo 1980s though.. by PaybackCS · · Score: 1

    White is where it's at today.

    1. Re:Yellow is sooo 1980s though.. by demmer · · Score: 1

      infrared!

  105. I'm afraid to try this mod... by Interrobang · · Score: 2

    ...I might break my mouse irreparably. And as always, I'd rather be Red than Dead!

    --ducking--

  106. Blue mouse by Dusabre · · Score: 2

    Follow the link: More like blue wig, red arse, sorry led.

    Oh and the song is by Eiffel 65. And it's titled "Blue".

    And it is extremely incredibly offensive (to my ears) techpop from Germany.

    1. Re:Blue mouse by Anonymous Coward · · Score: 0

      Eiffel 65 is Italian, but that doesn't make a difference to the offensive noise this song is

  107. Whoa by Masami+Eiri · · Score: 1

    Freaky... I was planning on doing this this weekend, when I go home, since that's where my soldering iron is.
    On another note: "This site is shutdown temporarily due to the slashdot effect."

  108. Off-topic (but optical mouse-related) by Hall · · Score: 1

    Does anyone have the same problem I do with the little "pads" on the bottom of the mouse getting air (pockets) and causing the mouse to move funny ?? It's terrible on my Logitech 3-button one I use at work; it's not as bad with my 5-button Logitech I have at home though (the work mouse no doubt gets more usage).

  109. -1 Moron... by Andy+Dodd · · Score: 3, Insightful

    Um, IR is the best thing you can use.

    All IR LEDs (except for maybe some outlandish ones, but none that I know of) are near-IR. Si isn't transparent to near-IR, it's transparent to far-IR (i.e. the type of IR given off by not-obscenely-hot objects). In fact, as others pointed out, most CCDs and CMOS sensors have their sensitivity peak in the near-IR area! (Note: This is the main principle that enables Sony NightShot mode. In most camcorders and digital cameras, there is an optical element that filters out near-IR light because it will utterly kill proper color rendition - In NightShot mode, this filter is moved out of the way, allowing more light in, which happens to be at the sensor's peak. Color rendition goes down the tubes, but recording something is better than recording nothing.)

    --
    retrorocket.o not found, launch anyway?
  110. Blaupunkt / Middle-aged males by rigmort · · Score: 1
    Very interesting story over at Business2.0

    http://www.business2.com/articles/mag/print/0,1643 ,44549,FF.html

    "Intentionally or not, Krell and others were capitalizing on an association between blue and high-end audio that dates back to 1923. In that year, product inspectors at German radiomaker Ideal began to daub a blue dot on earphones that met their standards. The mark became so identified with quality that in 1938 the company changed its name to Blaupunkt -- literally, blue dot. "

    "Blue got another image boost in the 1960s, when McIntosh Labs, a top-of-the-line stereo components maker in Binghamton, N.Y., hired University of Michigan researchers to find out what color of light is most visible to middle-age males, the company's core demographic. Blue, they said, and McIntosh began putting blue-tinted faceplates on its pricey units. "

  111. Standard B&B reply: by Anonymous Coward · · Score: 0

    Huh huh, huh huh you said "smegma" and "balls" in the same sentence. Huh huh, huh huh.

  112. Optical Mice on Glass by niall2 · · Score: 1

    Could one use an IR LED instead? Does any one know what the LED detector is in these mice? If so, you could possibly find a wavelenght of IR light that doesn't tramsit through your glass tabletop (which depends on the purity of the glass and any coatings on it) and BINGO...Optical Mice on Glass.

    --
    Today is a gift. Save the receipt.
    1. Re:Optical Mice on Glass by BrainInAJar · · Score: 1

      Or better still, a UV LED
      Then, when you're not using your mouse to navigate, you can give yourself a killer tan. You'd be the only bronzed geek in the world.

  113. IR probably works best by Andy+Dodd · · Score: 2

    As IR is where the peak of most CCD/CMOS imaging device's sensitivity is.

    But for many reasons (volume, for one), high-brightness red LEDs are more plentiful and cheaper than IR. Red is nearly as good sensitivity-wise, but much cheaper.

    --
    retrorocket.o not found, launch anyway?
  114. Broken mouse fixed with ambient light by jeepliberty · · Score: 1

    I had a mouse that failed in the x-axis. I opened it up and it started working. Apparently, the Infrared LED (invisible) burned out, but the IR reciever was okay. And the mouse worked fine with office lights as its light source.

  115. Infragreen? by Andy+Dodd · · Score: 2

    Um, there is no such thing.

    Infrared literally means something like, "below/before red". Theoretically infragreen exists... We call it yellow. Ultragreen exists to in the literal sense - But no one calls it that, they just say "blue".

    Most imaging devices (Like the CCDs and photomultipliers used in machinery, including NV goggles) are most sensitive to IR. Also, IR is invisible to people without IR goggles, so if active illumination is used, it's IR.

    Green is where the eye is most sensitive, but green light kills night vision. Also, red does not travel as far (This may be more of a psychological/eye sensitivity thing than physics) - Back in high school when I was on stage crew, white flashlights were *verboten* because the audience could see the spillover when they were used backstage. Red-filtered flashlights, OTOH, couldn't be seen by the audience.

    --
    retrorocket.o not found, launch anyway?
  116. The Slashdot Effect by Kellen · · Score: 1

    "This site is shutdown temporarily due to the slashdot effect." Hmm.... maybe we could try the slashdot effect on msn.com?

  117. Think about this by Anonymous Coward · · Score: 0

    Ok water is transparent, and looks blue from the reflection of the sky, but the sky is blue due to water particles in the air and sunlight defracting though them. So water makes the sky blue...

  118. Technical Considerations by Lewie · · Score: 2, Interesting

    I did this a few weeks ago in a fit of boredom at work after reading about it in some article here @ /.

    Since blue LED's have a voltage drop of nearly double red LEDs (~3.5v vs. ~1.9v), I wondered if it would be a problem. I replaced both reds in my wired Intellimouse Optical USB with blue 470 nm Nichias and the sensor appeared not to mind the shift of 200nm; it works fine. Nor did it appear to mind the ~33% drop in LED current, but as these are high-output blues, it's possible they are more efficient than the reds it replaced and are generating similar optical power. Or, the sensor isn't really picky.

    My mouse has a red translucent base so I changed out the LED that illuminates that as well, hoping for a nice purple maybe, but the plastic's response is too sharp. No blue gets through at all. Maybe if I use more current.... :)

    --
    This sig washed every five years whether it needs it or not!
  119. Logitech did them by megalomaniacs4u · · Score: 1

    My logitech optical (MS Intellimouse explorer ripoff) had a blue LED. It went well on my Ikea leather mouse mat.

    So go buy a logitech one then...

    1. Re:Logitech did them by corran__horn · · Score: 1

      Actually it can (and oftain does) go the other way-- Logitech has been making trackballs for years (7+ if I remember correctly) with optical sensors using lasers to track the movement. and then ~4 years ago Micro$oft began to do the same thing in their trackballs...

      logitech's site

      --

      If people can connect to one another even the smallest of voices will grow loud.
      --Serial Experiments Lain
    2. Re:Logitech did them by Anonymous Coward · · Score: 0

      Which is better, logitech or ms optical mouse? I ask because I'm going to buy one of the two today.

    3. Re:Logitech did them by NortWind · · Score: 2, Insightful

      Get Logitech DUAL sensor optical, especially for gaming where you need to mix fast acurate moves with precision moves.

    4. Re:Logitech did them by Anonymous Coward · · Score: 0

      Thanks a lot. I have seen the Logitech highly recommended, so you've confirmed it for me.

    5. Re:Logitech did them by BlueArchon · · Score: 2, Interesting

      I have a Logitec cordless optical, same design as the dual optical, batteries instead of a second sensor. But I find it a bit bulky, so I bought a Logitec MX300 mouse. Same precision, but a lot smaller and lighter. Well... it's a matter of preference...

    6. Re:Logitech did them by Whyrph · · Score: 1

      The Intellimouse Explorer 3.0 has a triple-speed optical sensor. So they wind up being about equal. The only difference is color of LEDs and mouse shape, pretty much.

    7. Re:Logitech did them by NortWind · · Score: 1

      But would you want something with the reliability of IE 3.0?

  120. Cutting the cord. by Anonymous Coward · · Score: 0

    Off topic rant.
    How often do I see cordless mouse users mousing inches away from the corded sensor. WTF! Whats the point people you still have a cord comming out the back of your computer and now you get to create toxic battery waste. "Woo Hoo", indeed. Smooth move Einstiens.

    1. Re:Cutting the cord. by netsharc · · Score: 2

      That's kinda dumb, as far as I know the receiver doesn't send feedback to the mouse concerning the strength of the signal it's getting, and regardless of distance to the receiver, the mouse transmits using the same signal strength, using the same amount of electricity.

      I do have cordless mouse and keyboard, and I like it. I use rechargable batteries so that's less waste. I like it, I can move the mouse towards me without having the cable snag somewhere and stop me, and I can move the mouse away from me without running over the cable.

      --
      What time is it/will be over there? Check with my iPhone app!
  121. Mod up parent by Greedo · · Score: 2

    That article is quite interesting. Provides a nice overview of how blue LEDs came to be, and how they came to be all the rage.

    Also, a neat piece of trivia on how Blaupunkt got it's name is on the second page.

    --
    Tuus crepidae innexilis sunt.
    1. Re:Mod up parent by Rader · · Score: 2

      I feel sorry for the guy who invented it getting only $165 as a bonus.

  122. Hey, looks like someone finally got some smarts! by Tuffnut · · Score: 1

    "This site is shutdown temporarily due to the slashdot effect."

  123. Minor nitpick by vasqzr · · Score: 1, Insightful


    This isn't a HOWTO. Read the HOWTO-HOWTO.

    It's more like a tutorial or informative web page.

    Please don't mod me down!

  124. Oh the irony by Winged+Youth · · Score: 1

    I spent wednesday afternoon modding mice. I put a blue LED in my cheap ass logitech. I log onto slashdot today, and what do I see?

    In any case, I also took my beautiful white Apple Pro mouse and stuck a white LED in it, so that the mouse has a faint glow in a dark room, and the gorgeous white LED beauty from the bottom. Those mice, however, were NOT meant to be disassembled. Much cursing and yelling and glueing involved.

    The next project, which ought to make the /. Mac Naysayers happy: the TWO-BUTTON Apple Pro mouse...oh...it will be a sight to see indeed...

    --
    "p2p stabbing is such a vast, untapped market"
    1. Re:Oh the irony by GiMP · · Score: 2

      I was just thinking that I should put a white LED in my apple pro mouse as well.. so how DO you take these things apart?

    2. Re:Oh the irony by Winged+Youth · · Score: 1

      Oy...be prepared to take a knife to it.

      The little white (assuming you have the white pro mouse) skirt around the bottom is the only real challenge. You'll have to get an exacto knife uner the skirt, and work all he way around it untill it comes off with marginal force. I had a crappy old black one to practice on, and i broke the skirt...you have to be really gentle, but firm. And watch out for the USB cable with the razor: i cut right through the white one, and had to replace it with the silver one from the black mouse (which looks cooler anyway). Once the skirt is off, it's pretty straightforward. Clean off any residual glue around the bottom of the clear plastic chell, and the white inner shell should just lift off. Then pop the bottom of the mouse out of the white shell, remove the protector over the LED, De-solder it, drop the white one in (I used a basic Radioshack one, and it works great) and reassemble everything. You'll have to glue the white skirt back on (I just used gel superglue) carfully, using *just enough* glue.

      Make sure you test your LED and your USB _BEFORE_ you reassemble, since there's gluing involved here.

      I'm very, very satisfied with this mod...If I owned a digital camera i'd get some pictures up (that would help explain things...). And I'm looking forward to the next one, with the body of the Black mouse.

      Hope that all helps!

      --
      "p2p stabbing is such a vast, untapped market"
  125. Obnoxius MS mouse has extra *decorative* light by davidmccabe · · Score: 1

    About 2 months ago a bought the most expensive mouse I have ever owned. FredMayer's had it on sale for $10. The Microsoft Wheel Mouse Optical USB, in addition to the red light underneeth, has a *extra* red light in the back (or whatever is called the side facing you), just so everybody knows that it is optical.

    And while the real light dims when not used (which is very cool, BTW), the decoration light doesn't, so it is on, bugging me, and consuming power, 24x7.

    I want to remove that thing.

  126. This requires some skill, but what if by Eudial · · Score: 1

    Use 2 leds at the same time?

    That way you get purple! (Ok, slightly less bright, but it's cool alright!)

    --
    GAAH! MY PRINTER IS ON FIRE!!! PUT IT OUT! PUT IT OUT!
  127. I put in an Infrared LED by johnny+cashed · · Score: 2, Interesting

    I got an iopty jr from macally. The mouse has a mostly clear body and of course, in the store it wasn't actually hooked up. I found the bright ass red LED to be annoying. So I purchased an infrared LED to quelch it. Works wonderfully.

  128. Optical Mice are resolution-dependent by Anonymous Coward · · Score: 0

    Actually the resolution is wavelength-dependent, which is why all the manufacturers had their mice produced with red-LEDs. Red LEDs perform better with the optical mouse sensors. However, blue is only a 3% decrease in performance, so you probably wouldn't notice. If you push it up to UV, the performance drop is something like 70%, so the slashdotters who want to put a black light into their mouse will have crappy tracking from the sensor.

    When apple was about to release their optical mouse, they wanted white LEDs instead of red, and I was supposed to test the performance, but they gave diffuse LEDs to me instead, which wouldn't be nearly bright enough, so red it was. In fact we showed them green, yellow, and blue, but they were worried about being able to buy enough of the other LEDs, so they dropped the idea.

    Since I tested the things, I tried all sorts of stuff with the optical chips--different lenses, reading tiny text with the test modes (it gives a nice little 16x16 grayscale image), and speeding up the shutter. It turns out that you can overclock these things by 8x by replacing the ceramic resonator with something with a little more zip. My mouse now never gets lost in fast firefights on UT2003. I calculated that you could drag the thing from the back of a car going 30 MPH before it would actually stop tracking movement.

  129. solar power by TechnoLust · · Score: 2
    I had this same problem and I made a mouse pad out of a solar cell, then ran the wire up to mouse. The mouse emits light, the solar cell turns it into electricity and it channels back up to the mouse. It also picks up light from the ambient room light and uses it as well.

    Seriously, though, get some NiMH or LI batteries.

    --
    "Da ist ein Technölüst in mein Unterpanten!"
  130. Re: "Red is Dead" by Anonymous Coward · · Score: 0

    Block one third of the video out pins.

  131. Won't degrade performance noticably by Anonymous Coward · · Score: 0

    Your performance might be 3% lower than with a red LED, which shouldn't really matter

  132. 2001 Flashbacks by rupert2000 · · Score: 2, Funny

    For me, the red light is too reminiscent the evil and almighty HAL. Just try playing an mp3 of 'Daisy Bell' while staring into your mouse's red light. See if you don't start pulling out PCI cards and breathing heavily.

  133. Quack by shadowj · · Score: 4, Funny
    ducktape is also very good to fix your windshield cracks

    Or for repairing a broken duck.

    Personally, I prefer using DUCT tape for most applications, including removing warts. Doesn't work all that well for taping ducts, though.

    --

    --Larry

    Never attribute to malice that which is adequately explained by incompetence

    1. Re:Quack by nutbar · · Score: 2, Informative

      Actually, duck tape is a rather popular brand of duct tape.

  134. White LED by Anonymous Coward · · Score: 0

    I put a white LED in my apple pro mouse. Now it matches all the other LEDs that Apple uses. I even changed the mouse icon in system prefs to show a white LED... Then apple changed the icon to their new white mouse. punks.

  135. Great Laugh ! by moby · · Score: 1


    thanks for the great laugh today
    it was one of those good ones that make you hurt

    no pain, no humor gain

  136. Try this article by Quixote · · Score: 3, Informative

    Since the site is slashdotted, here's an alternative article on the topic. Note the date: Dec 2000!
    I guess this isn't _that_ new of a hack.

  137. I have one of these by Nathanbp · · Score: 1

    It's a MS Intellimouse Explorer. It does not track very well on my wood grain desk, so I have to use a sheet of white paper as a mouse pad :(. This may be due to the fact that the entire bottom of the mouse is tranparent red plastic so the blue LED does not shine tho very well. The blue LED appears bright enough in normal mode and does dim properly.

    1. Re:I have one of these by jedikid86 · · Score: 1

      i have a nice logitech mouseman with the original red led in it and it has trouble on my wood grain desk too so i used to use a sheet of paper until i found an echostar satelite mouse pad thats about 2 feet long and a foot and a half wide

      --
      LAMA! WHARE'S THE LAMA?!
  138. Doesn't like my woodgrain by Anonymous Coward · · Score: 0

    My Logitech M-BJ58 (2nd generation optical wheel mouse) is confused by woodgrain too.
    I'm sure it depends on your woodgrain. Mine is the fine light coloured ikea wood. Doesn't help tt it's quite new.

  139. blue light without changing the LED by k2enemy · · Score: 0, Flamebait

    just have someone throw the mouse at you hard enough that that light blueshifts.

  140. Multi colors by ehiris · · Score: 2

    I wonder if you could use a multi-color led that adapts based on mouse state. Did anybody try that yet?

  141. Better dead than red? by Wesley+Felter · · Score: 2

    All these comments and I haven't seen a single cold war joke.

  142. Re: "Red is Dead" by fenix+down · · Score: 1

    I already have one of those, l4m3r! My m4d l33t d0g chewed on my monitor cable so Slashdot glows blue! Just like my Dodge Neon Type-R's wheel-wells, j0.

  143. Reflection of various wavelengths by Anonymous Coward · · Score: 0

    Wouldn't it be better to find what wavelength reflects the best off of the material you are using as a pad, or refracts depending on how these things work, and change your LED to that? in theory you could find a wavelength that doesn't pass through glass smoothly and make one that would work on glass surfaces.

  144. Mirror by RudeDude · · Score: 1
    I finally managed to grab the entire article and all images:
    View a copy here

    Mirror provided by Mr HOSTBOT

    --
    RudeDude
    Perl/Linux/PHP hacker
  145. Some of us... by coolfrood · · Score: 1

    ... use a touchpad, you insensitive clod!

  146. Who's Red? by Anonymous Coward · · Score: 1, Funny

    Red's dead, baby, Red's dead

  147. 10 buttons by Anonymous Coward · · Score: 0

    I know this is slightly off topic, but I really don't mind red under my mouse. OTHO I want a mouse with more than 5 buttons. Let's say that 10 buttons would be fine -- and almost as easy to use. Does anyone feels the same ? And have you ever seen such a mouse ? (I took a look at Logitech site, but no 10 buttons mouse)

  148. So kind... by jaybird144 · · Score: 1
    I tried to go to the site, and (no surprises here...) it's been slashdotted. The interesting part is that they actually had the courtesy to let us know:

    This site is shutdown temporarily due to the slashdot effect.

    How many sites do something like that for the benifit of the people destroying their bandwidth?

  149. Problems With Microsoft Mice by Cyno01 · · Score: 2

    I came acorss this mod one time and thought it would be incredibly cool with a blue LED instead, but I thought about it and the plexi used for the mouse wheel probably wouldn't be as grippy/nice feeling as the slightly rubbery surface of the wheel I had. I looked around and finally I found a mouse that came with a clear scroll wheel. it was the new m$ Blue Intellimouse. I bought it ($20 after a $10 rebate) and ordered some superbright blue LEDs. Once they came I hijacked voltage from the USB cable and put one directly behind the clear scroll wheel. It lights up quite nicely and looks awesome, Then I replaced the red LED in the back and the one for the sensor with blue ones. It worked fine and it was bright enough that the responsiveness didn't drop, but... all microsoft optical mice have the clear red plastic for the bottom. It glowed quite brightly when there were red LEDs in it, but i unfortunately discovered that the red plastic completely filters out the blue light. So the only light coming from it is out of the wheel, and of course the bottom if you pick it up. I attached some longer leads to the one in the back and and siliconed it directly too the little red oval in the butt of the mouse and managed to get a faint purple glow out of it. It still looks pretty cool, but it dissapointingly glows less. My TI-83+ Silver on the other hand glows very nicely with the 2 blue LEDs i put in it.

    --
    "Sic Semper Tyrannosaurus Rex."
  150. argh by SHEENmaster · · Score: 1

    I can see IR! I don't know if that makes using an IR led cooler or defeats the purpose.

    For those who keep asking me, it looks white-ish.

    --
    You can't judge a book by the way it wears its hair.
  151. HOWTO: Optical mice on a glass table/desk by syukton · · Score: 2, Funny

    Okay. This solution is kind of technically involved, so please just hold on tight.

    1. Take a piece of paper, about letter size (8.5 x 11 inches) and set it on top of the glass surface.
    2. secure it with tape or glue.
    3. Mouse on new paper surface. Consider this a table-top surface-mount upgrade, if you will. This is the PaperSurface 1.0 upgrade, the six-second solution to most of my mousing problems.

    I think this is one of those problems that takes less time to actually fix, than to mention it as being a problem.

    --
    Reinvent the wheel only at either a lower cost, greater effectiveness, or your own personal enrichment and satisfaction.
    1. Re:HOWTO: Optical mice on a glass table/desk by jedikid86 · · Score: 2, Funny

      ok now get a pen and draw on it or take notes or whatever and replace as needed its paper mousing surface 1.1

      --
      LAMA! WHARE'S THE LAMA?!
  152. Duck Tape Club by morzel · · Score: 2
    Except here in Europe the stuff is marketed as Duck Tape

    Don't know why tho :-)

    --
    Okay... I'll do the stupid things first, then you shy people follow.
    [Zappa]
    1. Re:Duck Tape Club by duren686 · · Score: 1

      Legend has it that it was called that because it's waterproof, like a duck.. or something.

      --
      Y2K Compliant since the late 1890s
  153. Well, as they say in crazy places and fashion stuf by Raffi+Spock · · Score: 1

    Blue is the new red!

    --
    Quid latine dictum sit, altum viditur.
    Anything said in Latin, sounds profound.
  154. Dudes, its so easy by RTCW_Monkey · · Score: 1

    First off all this mod costs under $5. A blu eLED costs $2 and all others are chepaer than that. All you have to do is buy an LED and find a friend who has a soldering iron. 2 years ago I change my LED to blue (cuz its 100x cooler and all my friends give me shit for it, yet they still want their mice changed too). As for the blue light itself, its bad for the resoultion of your mouse. Thats why they use red. But the coolest thing you can do is put and infrared LED in your mouse. Its provides almost the same amout of resolution as your red LED and it makes n00bs think that your mouse is haunted.

  155. Insider info: Any color will work, but... by Anonymous Coward · · Score: 0

    ... it's designed to work best with red, both in terms of the sensitivity and power consumption. At least that's my understanding from a coworker who was one of the original developers of the chipset in all the Logitech and MS mice (although I understand M$ developed their own competing chip that they use now).

    The chipset is manufactured by Agilent Technologies (the real HP spun off before HP was ruined). The original designers (coworkers) indeed used blue LEDs as well as yellow, green, etc. The first blue-led version I saw was one of the orignal prototypes (which is also cool because it is small -- about the size of a tic-tac box).

    If you turn over the mouse and look carefully on the lens, you may see the Agilent "spark of insight". And you thought it was just a nifty icon that meant "this is where the light comes from" :-)

    --An Agilent Person

    Agilent -- The only place where the HP Way is still in effect!

  156. How many geeks does it take to change an LED? by putch · · Score: 1

    How many geeks does it take to change an LED bulb?

    1,000= 1 to tell them how and 999 to say "imagine a beowolf cluster of these"

    --
    just because I don't care doesn't mean I don't understand!
  157. On A Microsoft Mouse... by Anonymous Coward · · Score: 0

    Yet another Microsoft product showing blue most of the time.

  158. Didn't I see this on tech tv... by lecter,hannibal_md · · Score: 0

    I think this was on the Screen Savers sometime back in July or August...

  159. Too easy!!! by tvadakia · · Score: 1

    Can't you guys perform hader mods?

    Mod your mouse to do this .

    Have fun.

    --
    Unique.
  160. Google Cache by Anonymous Coward · · Score: 0

    http://216.239.33.100/search?q=cache:pYdsFS2ayMgJ: www.extrememhz.com/mouseled1.shtml+mouseled1.shtml &hl=en&ie=UTF-8

  161. HAS ANYONE TRIED THIS WITH WHITE LED'S? by cybercomm · · Score: 2

    Sorry for posting in caps but as i read the comments it struck me as wierd that NOBODY even mentioned white LED's. Is there some problems with them (different voltage/consumption) or do the CCD sensors ignore white light? Is their brightness somehow impaired (i doubt it, but it doesent hurt to ask). Any insghts would be helpful and greatly appreciated as i have a whole ton of white ones (and frankly i wanna be original...somehow 300++ blue led's in my computer are starting to bore me!

    --
    Live for the present, learn from the past, and dream of the future!
    1. Re:HAS ANYONE TRIED THIS WITH WHITE LED'S? by scm · · Score: 1

      I don't see why it wouldn't work as long as you can get a white LED that's bright enough at the proper voltages. Maybe I'll give it a try...

    2. Re:HAS ANYONE TRIED THIS WITH WHITE LED'S? by brxndxn · · Score: 1

      I'm using a white led Logitech USB optical right now...

      I read this article a few hours ago and bought a 2600mcd 3.7V blue LED and a 1100mcd 3.6V white LED from Radio Shack.

      I first tried the blue LED - but it wasn't bright enough when the mouse went dim to start the pointer (after it sits a while)... It would work, however, if I clicked once to make it bright.

      Then, even though the white LED was rated dimmer, I tried it. Sure enough, it was slightly dimmer. However, it works perfect. It seems just as responsive - and it looks awesome with the logitech mouse which has a smoky transparent bottom..

      So, a white LED works fine.. In my case, a dim 1100 mcd.

      --
      --- We need more Ron Paul!
  162. Slashdot Strikes Again!! by byran+lei · · Score: 0

    > This site is shutdown temporarily due to the slashdot effect.

    Ah well....

  163. And that is why by hasse · · Score: 0, Flamebait

    todays "geeks" are nothing but hot-rodders. "Modding" their computers to look shiny or overclock them for the sake of being "best" on the block. Pure mechanics. Racing for pink slips. Who cares.

    People who are genuinly interested in computing do something else with their time. Sorry.

    1. Re:And that is why by Anonymous Coward · · Score: 0

      Like post on slashdot?

    2. Re:And that is why by Anonymous Coward · · Score: 0

      >People who are genuinly interested in computing do something else with their time. Sorry.

      Jesus frickin christ man what in the hell is up your ass?

    3. Re:And that is why by Primotheproton · · Score: 1

      So for the sake of arguement, because "today's geeks" want both form and functionality, they're not up to par with the "geeks" of yesteryear? My friend you have some identity problems.

    4. Re:And that is why by Anonymous Coward · · Score: 0

      a different coloured led doesn't qualify as in improvement in "form", you retarded fucking asshole shit-for-brains bastard child.

      fuck you!

      kthxbye~!

      Yours Sincerely,
      The Big Bad Troll.

  164. Red is dead by hasse · · Score: 1

    Now kill a commie for mommie

  165. buy a blue led optical mouse at by evil-empir3 · · Score: 1

    www.saitek.com save yourself the headache. this one is cool to because it will flash when you get email.

  166. Re: "Red is Dead" by Anonymous Coward · · Score: 0

    i have one too. nice 21 inch with no red.......damn thing and it aint l337

  167. That's nothing, I put a white LED in a CueCat! by Powercntrl · · Score: 2

    Back when opening up CueCats and modifying them to output unencrypted data was all the rage, I experimented with putting a white LED in one. Hell, it was free so if it didn't work afterwards, I wouldn't have cared. But sure enough, it still worked... Not only did it look cooler, but I found out it also gave it the unique ability of being able to scan RED barcodes, something laser-based and normal CueCats couldn't do.

    Picture of White-modifed CueCat

    I've also modified my share of mice, but I don't think they're as cool as my cat.

    --

    ---
    DRM is like antifreeze, to the MPAA/RIAA it's sweet, to the consumers it's poison.
  168. Phototransistors like RED by bigberk · · Score: 2, Insightful

    OK, true, these modern optical mice don't use simple phototransistors but my guess is that they use devices based on semiconductors that behave like phototransistors.

    Silicon phototransistors are most sensitive to near-infrared light. The closest visible frequency to this is red, which may explain why you see red LEDs a lot in photosensitive equipment.

    That in mind, you may "see" (ha ha) good results using an infrared LED.

  169. Performance difference can be prevented by MajikMan · · Score: 1

    ...or at least I'm told. From my readings, the reason that the performance dropps with blue LEDs is usually becasue someone just went to Radio Shack and picked up whatever 5mm blue LED they had. The problem with this is that the blue is not nearly is bright as the stock red diodes. Get a blue LED that is 3000+ mcd and it should work close enough to the same to not notice any diffrence.

    --

    "Infants flesh will be in season throughout the year." -Swift

  170. WHITE LED and BLUE LED GAMEBOY by kninja · · Score: 1

    I agree that blue is cool. But for backlighting and in a Mobile Phone I'd like to have a white LED backlight. Nokia has been doing this for a little while. It's a close second to blue in a lot of cases. More expensive though.

    I changed the LED in my Nintendo to blue a month ago. I don't know if people are more shocked by the fact that my nintendo works, or that the LED is blue instead of the usual blinking red.

    This also reminds me of the gameboy pocket with a blue(I think) backlighting.

  171. Left Hand/Right Hand by michaeli · · Score: 1

    -- speak for yourself, lefty

    No, no, no... they speak of a right-handed guy. See, you have to hold the mouse with your right hand (as most mice nowadays are egonomically designed for the right and would be pretty hard to handle with the left), thus leaving the left hand to venture off for other tasks.

    --


    "this is a really good piece of cantoloupe."
  172. FP BABY!!! by Anonymous Coward · · Score: 0
  173. Arrrrgh! by Anonymous Coward · · Score: 0

    Ernest T. Slashdot, modding his case with some
    duct tape and one Dremel drill.

    Didn't take his pills.

    Look at him dabbling, making his harddrive into a doorstop!

    What a sop!

    All the Slashdot posters, where do they all come from?

    All the Slashdot posters, where do they all be-long?...

  174. I should have thought of that. by Zebthepilot · · Score: 1

    Wow. I never thought of that. that surprises me. I should have. Oh well. hmm. I'm thinking holiday colors.

    --
    http://www.zebpalmer.com
  175. This is what will happen. by Anonymous Coward · · Score: 0

    Tons of people will start to mod their mice to have blue LEDs. After a while, manufacturers will take note, and build all mice with blue LEDs. Nerds will eventually become bored with blue and move on to another color. There are only so many other colored LEDs, so red will eventually make it back in style. You're all a bunch of retards.

  176. We knew this was coming by Anonymous Coward · · Score: 0

    Thanks to disco, MTV, video games, Pokemon, Sesame Street, the last few generations have been obsessed with flashing colored lights. Now, cops are not known for their intelligence, but up to now they owned a monopoly on blinking blue lights. None of this bodes well for civilization as we know it.

  177. GOOGLE CACHE by zoloto · · Score: 0

    http://216.239.37.100/search?q=cache:pYdsFS2ayMgJ: www.extrememhz.com/mouseled1.shtml+%22%2Bwww.extre memhz.%2Bcom/mouseled1.shtml%22&hl=en&ie=UTF-8

  178. Just like phones ... by Anonymous Coward · · Score: 0

    Nowadays, you walk along and you see a dozen dodgy little shops offering to convert your 8210 LEDs to blue (like the 8250), or white (like the 8310, which I have and is sweet as); how long before an industry springs up in converting mice LEDs to look like models they aren't? Or maybe adding a red LED to your ball mouse, to make it look more l33t ...

    Daniel Stone

  179. NEMA color codes by Animats · · Score: 2
    Now that, at last, we have affordable LEDs in all colors, we can get back to the classic NEMA color code and get rid of all those bogus red lights.
    • Green - normal condition
    • Yellow - abnormal, but not serious
    • Red - trouble. You should be doing something to make this light go out.
    • Blue, White - general purpose, no designated meaning. Use whenever colors above don't apply.
    Heavy industrial equipment has followed these rules for half a century, as have IBM mainframes. Stick to this in rackmount gear. It makes it far easier to tell, with a quick look, what needs attention.
  180. Obligatory Matrix ref with semi serious point by Duds · · Score: 1

    Explain THIS

    They broke the code!

  181. Trackman by Nick_Psyko · · Score: 1

    Me too, have to take it apart every couple of months to 'clean' the microswiches and re-seat them.

    --
    mountvol \\?\brain{dbe069b1-65ae-11d5-bab4-806d6172696f}\hu mor\
  182. IR leds by olman · · Score: 2

    IR leds give most output for the energy. I don't know if their CCD element is sensitive to IR thought. Many optical detectors are in fact much more sensitive to IR than visible light.

  183. Here's a good HOWTO by zonker · · Score: 0

    For adding (or changing) an LED in your mouse called Project Iris. Cheap and easy mod that looks nice too.

  184. YAHUA? by Anonymous Coward · · Score: 0

    THEY ARLEADY HAVE THEM...

  185. Re:Don't actually do this! by cmdr_beeftaco · · Score: 1
    625,000 nanometers

    don't you 6.25 kilometers? you sound so smart and then you can't even figure out the metric system.

  186. Last Post! by alpg · · Score: 1

    The primary cause of failure in electrical appliances is an expired
    warranty. Often, you can get an appliance running again simply by changing
    the warranty expiration date with a 15/64-inch felt-tipped marker.
    -- Dave Barry, "The Taming of the Screw"

    - this post brought to you by the Automated Last Post Generator...