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Homebrewed In-Dash CD-ROM Player

DrD8m writes: "Hardware is changing faster every day, It's very sad to throw away old hardware. This is an example for recyclying it. It's a Computer Audio CD Car Player HOWTO. Using an old computer CD drive in your car. Easy to do and Cool! Are there any projects like this? I'm sure there are, but I don't want to be a N.A.S.A. engineer to do it." This is the best kind of online instruction -- well-illustrated, no guarantees, creative re-use.

24 of 140 comments (clear)

  1. Potential problem by Tim+Macinta · · Score: 5

    Car CD players are usually built to withstand shock, whereas my CD-ROM drive tends to skip when jostled. Is there a way to dampen the shocks from pot-holes, etc. when using a CD-ROM drive in a car? (I don't know if the site in question answers this as it seems to be slashdotted.)

    1. Re:Potential problem by po_boy · · Score: 5

      I reccommend wrapping your tires in bubble wrap so that it absorbs the shock for every appliance in your car.

  2. Why bother? Better stuff exists. by GeorgieBoy · · Score: 5

    I mean, sure, it's geeky and all, and it uses a piece of old hardware, but I think this is a lot cooler

    Empeg, as it started out in a homebrew fashion, is far more interesting device. Seems that Diamond has purchased that though, as it's now the RioCar.

  3. Useful as a cup holder too by Small+Hairy+Troll · · Score: 5

    And if it isn't playing a CD, the cd tray can hold your mocha frappachino.

  4. Re:Slashdotted instantly by RAruler · · Score: 3

    Theres a bunch of good reasons why not to..

    a) Legality, say the information contained on the site is illegal (DeCSS), or maybe the site's author doesn't want to have it mirrored. Especially if the person depends on the ad revenue.

    b) Doesn't work all the time, say the website is dynamic, like that Perl to Flash website. There's no way to mirror that easily. Or the mechanical counter. etc.

    c) Its not the freshest information, the author could decide to revise the information. But the mirror might not reflect that.

    d) What to mirror, what not to mirror. Lets say that a site makes use of a lot of links to other sites, do you mirror those as well, and the links on those sites?

    Sometimes the internet doesn't work the way you want to, if this bothers you so much, you can devote your time to making a way to mirror sites mentioned on slashdot before they get slashdotted.

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    Insert Witty Sig Here
  5. These buffers are violating copyright.... by nyet · · Score: 4

    The RIAA needs to investigate this assertion that data is copied in digial format into consumer CD player memory, sometimes MORE THAN ONCE!

    This is a blatant violation of the copywrite holder's rights.

    This is THEFT pure and simple.

  6. Anyone know of an IDE to CF converter? by ikekrull · · Score: 4

    Had a thought the other day - Why not get a cheap MP3 player that takes CF cards, and attach an IDE HDD to it instead. Since CF cards look like ATA devices, there shouldn't be any major modifications necessary, should there? Since there are CF-to-IDE converters why not the other way around? ANyone got any clues?

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    I gots ta ding a ding dang my dang a long ling long
    1. Re:Anyone know of an IDE to CF converter? by yahwey · · Score: 3

      In order to hook up CompactFlash to IDE, all you have to do is rearange the order of the wires in the IDE ribon cable. I assume that you could do it backwards too. You'll find instructions for IDE -> CF at http://wtarreau.free.fr/1u/v0-flash.html If you do it all backwards, you *might* be able to make it work.

  7. Here's a cool system... by duplicate-nickname · · Score: 3
    Check out what this guy did to his Subaru Impreza RS. I like the LCD he used!! :)

    ÕÕ

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  8. Re:Turn your P4 into a space heater! by VAXman · · Score: 4

    Well, you wouldn't know if you read that article, since it was false. Thermal throttling has never even been observed on any P4 system in the field; I have never gotten my P4 system above 39 degrees, while the throttling point is 75. Besides, you can turn the feature off using IA32_CS_MISC_ENABLES (this is documented in volume 3 of the Pentium 4 manual). Of course, I'm certain that you didn't even bother to check, and are more confortable showing your ignorance on Slashdot.

  9. Other old hardware by ActiveSex · · Score: 3

    Now if someone would find something cool to do with other old stuff, like this crate full of 8086's (and other assorted computer shit) I have lying around. The only reason I keep them around is because whenever I'm about to throw them out I think that they might be valuable antiques one day, or that as soon as they're gone I'll think of some ingenius project to do with them.

    At one time I had dreams of using them to control robots or control this remote sensing apparatus I had halfway designed before forgetting about it.

    I love to see old stuff resurrected again to do something really cool.

    -Markus

    P.S. Does anyone have any ideas for those 8086's? :)



    "That explains the milk in the coconuts."

  10. Turn your P4 into a space heater! by zaius · · Score: 5

    It's even got the fans pre-installed, all you need to do is aim it in the right direction!

  11. Re:Pop goes the server by Tairan · · Score: 3
    Mirror located at my site, as usual

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    /. is a commercial entity. goto slashdot.com
  12. Pop goes the server by andyh1978 · · Score: 3
    This is the best kind of online instruction -- well-illustrated, no guarantees, creative re-use
    ... and mirrored on several servers so that it can be read by all without the server collapsing.

    Oh, wait a minute... :-p

    Might be an idea to give the smaller sites a bit of warning before thrashing their servers into oblivion.
  13. CD Player Link by TheLer · · Score: 4

    Heres another example of reusing youre CDROM

    Sometimes you by Force overwhelmed are.

  14. Re:Slashdotted instantly by Da+Web+Guru · · Score: 3

    Isn't it wierd how as soon as a good article pops up the links are instantly Slashdotted (and remain so for several hours)? Now I like Slashdot and all (I read it daily), but it's almost as if we (the devoted readers of Slashdot) are a swarm of locusts, feeding on the web site provider's bandwidth and server resources, suddenly attacking a server farm almost all at once, then we disappear almost as suddenly as we came, leaving a trail of overheated processors and worn out disk drives in our wake, often times confusing administrators and leaving them lost in a daze...

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    --guru

  15. Hmmm.... by Omerna · · Score: 3

    I've seen someone mention the problem of skipping when going over bumps. One could easily just switch to a CD Player that already has skip protection (through a read ahead device). However, there has to be a way to stop this.

    I've seen someone mention putting it in foam or something like that... That might work, but wouldn't it still bounce a little? If the foam is even relatively stiff the player will just bounce with the car.

    What about using the foam in one of these pillows to cushion it. Also, put it in a case attached to two wires so it can swing back and forth when the car hits a bump... I saw cup holders like this once. The drink wouldn't spill because they swung back and forth and stayed level... at least most of the time.

    Hopefully those measures would stop most skipping.
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    No sig for you.
  16. Don't need the computer, anyways... by MadCow42 · · Score: 4
    I guess the good thing is that most computer cd-rom drives don't need to be attached to a computer to play CD's... simply hook up the power, and push play.

    Shock is definately a concern, but nothing a little creative mounting wouldn't overcome.

    Personally, however, I still like hooking up my MP3 player to the system instead... no shock concerns, easy to mix and match tunes, etc. If it wasn't for the sticker-shock on Flash cards, it'd be ideal.

    MadCow.

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    I used to have a sig, but I set it free and it never came back.
  17. The street finds it's own use for things by Mall0 · · Score: 4

    While this is a cool little hack, but if you are interested in going all the way to frankenstein mp3 decoding car audio system glory check out www.mp3car.com

  18. Slashdotted instantly by blonde+rser · · Score: 3

    since its obvious little sites like this are going to slashdotted as soon as they are posted couldn't /. create its own mirror since we know /. can handle the load and the site probably isn't very big. Plus it would only have to be for a couple hours.

  19. best online instruction? by hyrdra · · Score: 3

    First, most all CD-ROM drives after 4x don't have a play button and won't automatically start playback when an audio CD is inserted.

    So this means you're going to need someway to send the IDE signal, which would probably involve, at least, a microcontroller although I'm not fully aware of the ATAPI spec and you may have to make the device completly physical (e.g. go through all the init routines) to even get to the point where you can send a command.

    Second, these drives, as mentioned don't have skip protection. Todays in dash CD players have read ahead of 45-60 seconds or more, because this is what it takes to get even marginal performance while driving over gravel in your SUV.

    Personally, I built an in-dash MP3/CD player using an old Sony VAIO 233 MHz system for my friend. The CD-ROM which came with the system was used, and in this case it already had mechanical skip protection. I used the LCD that came with it and bought a digital touch screen kit and connected this up the parallel port. To completly prevent skipping, I extracted the selected CD track to memory as it loads, at about +120 sec into playing buffer. Works very well. This was in a Jeep and he's told me he hasn't got it to skip. And yes, it runs Linux off an ATAFlash IDE card (no noise!).

    In reference to the original post, you don't have to be a N.A.S.A. engineer, all you need is a laptop and some time (a few weekends).

    By the time you're finished looking for your obstruficated CD-ROM and forcing the thing in your dash, you'd might as well been better purchasing a $165 car player as you'd be adding no addition functionality.

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    "I'll just chip in a bit for RedHat: I actually have that installed on my university machine." - Linus, '95
  20. patent this NOW by popular · · Score: 3
    By no means am I an EE grad, student, or even an electronics hobbyist, so I very well could be wrong, but the hack seems simple enough, and the site is /.'ed, so I can't compare notes. You probably have a 12V DC circuit in your car, and The wire colors on CD Audio cables explain themselves... what do red and white mean in audio components? In electronics, what does black mean? There, you figured it out.

    This is something that is painfully obvious, although few, if any have actually done it before. With the right phrasing, you just might be able to pull off a patent on the idea.

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  21. Emergency Mirror for the article by DrD8m · · Score: 5

    I'm sorry, our server could not afford such traffic, here it's link to a little mirror for this article
    http://www.terra.es/personal/sorgocondenado/Comput erAudioCDCarPlayer/

  22. Tips by D4rkm1lk · · Score: 4
    This site is good, but here's some even better tips:

    (I've been using an old CD-ROM in my car for ages, here's my experience)

    • there's no need to stuff around with heatsinks! Just mount the 7805 so that the back of it is firmly against either the CDROM's housing or a good piece of metal in the dash. This dissipates the heat well enough, and electrically there's no worries in a negative earth car. (almost all cars in the last 20 yrs.)
    • Not all CDROM's are created equal. Experiment with different drives - some are excellent! I've got a "Diamond Data" 12x, which actually seems to have a (small, only fraction of a second) anti-skip buffer, and you can see the disc rotating at 2x. It also has nice big rubber shockers inside!
    • "alternator whine", the enemy of any in-car electronics can be particularly bad for these. (you can tell if it's this because it only happens when the engine's on, and changes pitch with engine revs.) Use a capacator across the power supply, but there's no need for ridiculously big one like for stereos. If it's still too bad, use a coil as well, these are commonly available at car shops as "noise suppressors".
    • experiment with different bumps: most CDROM's are good at withstanding bumps in some directions and not others. Test yours on the bench first, using just the computer's power lead and headphones. figure out which bumps are worst. Then when you mount it in the car, try and allow for some padding in that direction.
    • security: I deliberatey removed the flip-down cover from where the tray comes out of. It still works just fine, but it looks like a detachable face unit without the face! (but let's face it, if someone does nick it, it's cheap to replace)
    • Mine has been happily working for about 2 years like this, and with some rags at the sides as padding it's better over the bumps than my friend's cheap car stereo.!

    IDEA: (for the enthusiastic, probably even a money-making idea): It would be possible to use a microcontroller to send the play command to the IDE port, i'm just not sure how much of the bus you'd have to implement or how expensive it would end up being.

    Good luck! (but be careful...that site describes what can happen)