PC Power Supplies

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#2
newusr said:
Can we stack PC Power Supplies and use them. How could you regulate the amperage?

http://www.youtube.com/watch?v=ldGdBwKi6Po
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Don't think so with a computer supply. Ground (low) has to float to stack supplies. It would take a bit of rewiring, and maybe trace cutting. Be aware there are lethal voltages inside supply. Current control would require additional circuitry. Also, 12v PC supplies are usually quite lame.
Doc
 
#3
thaumaturge said:
Don't think so with a computer supply. Ground (low) has to float to stack supplies. It would take a bit of rewiring, and maybe trace cutting. Be aware there are lethal voltages inside supply. Current control would require additional circuitry. Also, 12v PC supplies are usually quite lame.
Doc
Click to expand...

With ungrounded (2 prong) smps laptop bricks I have successfully stacked them to get +/-19v and +/-38v. It works quite well - just make sure you have an ungrounded smps brick.

Here is example of it in action powering a dual rail LM3886. Look at the red and black wires on the left - straight from the bricks with choke from smps still in place.

http://www.diyaudio.com/forums/chip-amps/276355-lm-3886-kit-recomendation-2.html#post4407028

496314d1438314421-lm-3886-kit-recomendation-lm3886-works-19v-smps.jpg
 
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#5
The video link he posted showed an ATX supply. I agree Laptop bricks are quite different.
Doc

A typical 300W not easily stackable.
 

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