Yeah, building regulated power supplies with the 78xx (and 79xx chips for the negative rail) is pretty stock. If you are hoping to run your computer off one.. well... I wouldn't bother. By the time you stack enough of these to give you the required amperage, you may as well buy a good quality switching power supply.
(A 7805 gives you 5V/1A. Ie 5 watts... which is about one buggerallth of what a modern computer draws).
Still, if you are interested, grab a couple of big polarized electrolitic capacitors, stick one either side of the 78xx, tie the middle pin to ground, the inputs and outputs as marked.. and there you go. Not difficult.
Here is one of the many sites that talk about this chip
Note that the voltage may be ajusted by using resistors on the input and middle pins.
In response to another followup - Art (like beauty) is in the eye of the beholder.
There are peeps who say that all graffiti is vandalism, and others that all graffiti is art.
Like any good fence sitter: I've seen some amazing renditions done with spray cans over "public" walls. These to me are art. Amazing use of colour, form. Many with a social message.
"Tagging", which if interpret it correctly, means basically signing your name on every exposed surface you can find, to me is vandalism. I've seen "taggers" scrawl stupid looking black squiggles that even a demented three year-old wouldn't bother producing scrawled on such creative places such as the sides of trains, bus-shelters and toilet doors.
My pet hate is when they paint right over the top of more elaborate and creative works. Its almost as if "I couldn't do something like that, so I'm going to fuck it up".
There is middle ground, but most graffiti I've seen falls into one of these two camps.
Unless there is a huge change in their business model, they will never make them open source.
The code for these drivers contains a lot of information about the underlying design... of both the hardware and the accelleration (sp?) techniques that give this product the edge... exactly the sort of stuff competing companies would love to get their hands on. Remember that a good driver can really have a marked effect on the performance of a graphics card.
Of course, all their competitors have probably already reverse engineered every card on the market, but who wants to make it easy?
I love open source as much as the next guy, but we have to accept the commericial reality that just because something runs on an open source platform, it isn't necessarily open source itsself. Oracle is a good example of this.
Linux on the desktop may change this. When enough people avoid buying Company X's product because their cross-platform support blows goats, they may very well be ready to open the source.
Lego bricks are made out of ABS plastics.
This powerpoint doc" gives the following properties:
Density 1.05 - 1.07 Mg/m^3
Bulk Modulus 4.1 - 4.6 GPa
Compressive Strength 55 - 60 MPa
Elastic Limit 40 - 45 MPa
Endurance Limit 24 - 27 MPa
Fracture Toughness 2.3 - 2.6 MPa.m1/2
Hardness 100 - 140 MPa
Modulus of Rupture 50 - 55 MPa
Poisson's Ratio 0.38 - 0.42
Shear Modulus 0.85 - 0.95 GPa
Which is enough to calculate at what at point point a solid cube of ABS will fail under its own weight. (Depending on your definition of fail.. but lets use, in this example example, a failure is when the pressure due to the blocks weight excedes the compressive strength).
However, in order to calculate the failure for a lego construction, I need geometic information. Anybody want to weigh a lego brick and give me a detailed engineering diagram? I suggest we settle on the standard 4x8 brick. Note that the result will be affected by exactly how its constructed. Any bricklayers on slashdot care to make a suggestion on the best way to lay a 3 dimensional solid structure?
Easy, just do a google image search for "anal stretching" and see what horrible pictures you turn up.
(Note: Amazingly... at least at the hour I write this... that is actually a work safe link. Poor girl.)
The Karma sutra was written by Vatsyayana sometime between the 1st and 6th century AD.
If that's not a technical manual, I don't know what is.
Oh wait.. this is Slashdot.
Tuer. The troehy setats taht nllamroy redaers olny sacn fsrit and lsat letters of erevy wrod. Hevewor a soitutitsbun as slpmie as rnisreveg erevy letter epecxt tsehe mekas vrey dluciffit rnidaeg for the
mtirojay.
> There are civilized ways to engage in warfare, > and there are barbaric ways.
Yes. Civilised warfare is when you sit in your plane, miles above the enemy, and bomb him to kingdom come with superior technology.
Barabaric warfare is what you do when you don't have million dollar computer controlled ICBMs, and are reduced to strapping TNT to your chest and blowing yourself up in a way that will, hopefully, draw international attention to the plight of your oppressed people.
I'm not saying that the Palestinian extremists are any more "in the right" that the Israeli or USA extremists, only that when you are confronted with superior weaponry, you really don't have a lot of choice.
Remember David vs Goliath? David defeated superior physical strength with superior weaponry. The story now paints him as a hero... even though he didn't following the chivalrous rules of engagement.
Slashdot Mirror
Becwoz that waskawy wabbit is wunning winux!
Now that they've established the name, I think they should change it "Lindo", which is spanish for "cute" or "beautiful".
Or maybe "ventana" or "vidrio".
Matt
I don't believe that you posted the phrase "I for one welcome" to Slashdot without following it with the word "Overlords".
Yeah, building regulated power supplies with the 78xx (and 79xx chips for the negative rail) is pretty stock. If you are hoping to run your computer off one.. well... I wouldn't bother. By the time you stack enough of these to give you the required amperage, you may as well buy a good quality switching power supply. (A 7805 gives you 5V/1A. Ie 5 watts... which is about one buggerallth of what a modern computer draws). Still, if you are interested, grab a couple of big polarized electrolitic capacitors, stick one either side of the 78xx, tie the middle pin to ground, the inputs and outputs as marked.. and there you go. Not difficult. Here is one of the many sites that talk about this chip Note that the voltage may be ajusted by using resistors on the input and middle pins.
> I'm an ENTJ
I'm FINE
Fucked up, Insecure, Nuerotic and Emotional.
If you believe in Nomenative determinism, you really shouldn't be taking business advise from somebody named Eric Sink.
> Where's the art?
In response to another followup - Art (like beauty) is in the eye of the beholder.
There are peeps who say that all graffiti is vandalism, and others that all graffiti is art.
Like any good fence sitter: I've seen some amazing renditions done with spray cans over "public" walls. These to me are art. Amazing use of colour, form. Many with a social message.
"Tagging", which if interpret it correctly, means basically signing your name on every exposed surface you can find, to me is vandalism. I've seen "taggers" scrawl stupid looking black squiggles that even a demented three year-old wouldn't bother producing scrawled on such creative places such as the sides of trains, bus-shelters and toilet doors.
My pet hate is when they paint right over the top of more elaborate and creative works. Its almost as if "I couldn't do something like that, so I'm going to fuck it up".
There is middle ground, but most graffiti I've seen falls into one of these two camps.
Sorry, but you won't find a Brazilian who doesn't like soccer either.
Rene Magritte was Belgian?
Thank god for that. I was getting ready to burn all my Magritte prints in the expunging of all things French!
> People from the East will see Americans as rude. A lot of NY'ers see Americans as rude. Oh, wait...
> But when will they make them open source?
Unless there is a huge change in their business model, they will never make them open source.
The code for these drivers contains a lot of information about the underlying design... of both the hardware and the accelleration (sp?) techniques that give this product the edge... exactly the sort of stuff competing companies would love to get their hands on. Remember that a good driver can really have a marked effect on the performance of a graphics card.
Of course, all their competitors have probably already reverse engineered every card on the market, but who wants to make it easy?
I love open source as much as the next guy, but we have to accept the commericial reality that just because something runs on an open source platform, it isn't necessarily open source itsself. Oracle is a good example of this.
Linux on the desktop may change this. When enough people avoid buying Company X's product because their cross-platform support blows goats, they may very well be ready to open the source.
> The last time I tried to lay a 3dimensional
> solid structure, I got my face slapped.
Its like the old gag:
"If you laid every women on earth end-to-end you'd be bloody tired afterwards".
Cool.
I was assuming that the original poster was asking for a cube on the earth's surface.
However, constructing a planet out of Lego sounds way cooler.
More than ever we need that space elevator.
Which is enough to calculate at what at point point a solid cube of ABS will fail under its own weight. (Depending on your definition of fail.. but lets use, in this example example, a failure is when the pressure due to the blocks weight excedes the compressive strength).
However, in order to calculate the failure for a lego construction, I need geometic information. Anybody want to weigh a lego brick and give me a detailed engineering diagram? I suggest we settle on the standard 4x8 brick. Note that the result will be affected by exactly how its constructed. Any bricklayers on slashdot care to make a suggestion on the best way to lay a 3 dimensional solid structure?
I'm absolutely in agreement.
These days you need a couple of CDs for Debian.
When I was a lad we used to fit a full Debian distribution on one side of an 8" floppy disk.
Easy, just do a google image search for "anal stretching" and see what horrible pictures you turn up. (Note: Amazingly... at least at the hour I write this... that is actually a work safe link. Poor girl.)
The Karma sutra was written by Vatsyayana sometime between the 1st and 6th century AD. If that's not a technical manual, I don't know what is. Oh wait.. this is Slashdot.
D'oh I should have hit
The preview button before
posting a poem.
I did not read the Article posted above But this is Slashdot.
Hey! Did you hear that some stupid woman sued McDonalds because she fell down at Walmart and spilt hot goatse all over some litigious bastards?
Link to patent text
Its not like the patent office don't deserve a good slashdotting.
Tuer. The troehy setats taht nllamroy redaers olny sacn fsrit and lsat letters of erevy wrod. Hevewor a soitutitsbun as slpmie as rnisreveg erevy letter epecxt tsehe mekas vrey dluciffit rnidaeg for the mtirojay.
> There are civilized ways to engage in warfare,
> and there are barbaric ways.
Yes. Civilised warfare is when you sit in your plane, miles above the enemy, and bomb him to kingdom come with superior technology.
Barabaric warfare is what you do when you don't have million dollar computer controlled ICBMs, and are reduced to strapping TNT to your chest and blowing yourself up in a way that will, hopefully, draw international attention to the plight of your oppressed people.
I'm not saying that the Palestinian extremists are any more "in the right" that the Israeli or USA extremists, only that when you are confronted with superior weaponry, you really don't have a lot of choice.
Remember David vs Goliath? David defeated superior physical strength with superior weaponry. The story now paints him as a hero... even though he didn't following the chivalrous rules of engagement.