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Old 13th May 2005, 01:46 AM   #1
JZatopa is offline JZatopa  United States
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Default ne1 have fun projects for CPU PS?

I have an extra cpu ps. Have any of you used these in intresting projects?
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Old 19th June 2005, 10:49 PM   #2
JZatopa is offline JZatopa  United States
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noone has found a use for these things?
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Old 19th June 2005, 11:26 PM   #3
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As I just replied in another thread...they're not exactly suitable for audio use. The voltage is too low. There's not usually anything like a decent negative rail. Your best bet is probably to put a junker car amplifier on the +12VDC output. Don't try to draw too much current or you'll blow the supply.
If you like the sound of car amplifiers, you'll probably be happy. If you're hoping for something more along the lines of home hi-fi, you may end up being dissapointed.
You can always use it as a door stop.

Grey
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Old 20th June 2005, 12:17 AM   #4
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they make great 12 volt supplies.about 10 to 20 amps available. If you want to part them out, you can get.....
-cooling fan
-IEC socket (if it's a good supply, it'll be a socket with integral EMI filter, or a regular socket with some caps and coils on a board)
-a pair of 200 volt caps that are at least 220 uF, or a single 400v if an active PFC supply
- power switch maybe
-some power wire
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Old 20th June 2005, 12:21 AM   #5
tlf9999 is offline tlf9999  United States
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What about a bridged class A amp powered by an ATX PS?

Those guys usually are good steady-state amp ratings on the +12v line.

Now, if you can think of a way to use the 3.3v or 5v lines, ...
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Old 20th June 2005, 06:37 AM   #6
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If you want to use the 5V line

Connect the positive wire of a computer fan to 12V and the negative wire on 5V and the fan will run at a quiet 7V
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Old 20th June 2005, 11:53 AM   #7
ilimzn is offline ilimzn  Croatia
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In theory, you could rewind the transformer for higher voltages, IF you can take it apart (the cores are ferrite, so very brittle, and they are glued together). The rectifier part would then also have to be changed for higher voltage diodes and caps, and the feedback for the regulator adjusted. I've done this before, and frankly, it is a PITA but it works.
Other than that, there are quite a number of useful parts in there, in addition to the already menationed, often times you can find 1-3 power fets, 7805, 7812 and 7912 regulators, HV caps, low ESR low voltage electrolytics, small chokes, etc.
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Old 20th June 2005, 01:46 PM   #8
AJT is offline AJT  Philippines
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Default reinforce the negative rail

they can be modifed to strengthen the -12volt rail by using the same capacity +12volt rectifiers for the negative rail, so that you will have +/-12volt supply! likewise the common mode filter choke will have to be modified to use same size wire as that for the 12volt.
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