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power supply/driver help

chipdouglas

chipdouglas

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I have this power supply that is is 120/230 input and 24vdc output. is there a way to convert the ddl driver to accept a 24vdc input? i would like to use this power supply because i am making labby with TEC. :thanks:
 

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ElektroFreak

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My advice to you is to find a different PS that supplies 9-12V output. An LM317 regulator will accept up to 40V on its input, but it will convert the voltage difference between it's input and output to heat. Therefore, to keep the heating to a minimum, you'll want to keep the difference between the input voltage and the LM317 output to a minimum. Depending on space, a computer power supply can be ideal as it supplies 12V, 5V, and 3.3V DC output.
 
chipdouglas

chipdouglas

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I have a few computer power supplies and its the same size. so i'll do that then. THANKS!
 
Meatball

Meatball

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No Problem Chip. I like to use ATX power supplies like those to power car subwoofer amplifiers for use in my house. You can get an ATX with up to 25A on it's 12V rail. Granted, it's not the most compact of power supplies, but it is heavily regulated!
 
chipdouglas

chipdouglas

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I have taken apart 2 old computers in im office and the atx's only work for me when they are hooked up to the cpu. when i disconnect them i get nothing. any advice?
 
Darkarmyofone

Darkarmyofone

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one of those wires needs to be grounded. its like a safety thing so the power supply isnt pumping live power down incomplete lines.

check google for the pin-out of your specific model PSU and go from there. i would ground all the grounds together, see if that works.

post results.
 
Meatball

Meatball

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use that tutorial. It in the second paragraph of step three. You have to ground the green wire to tell the PSU that the V is "ok". Don't forget to read step 9 about adding a resistor.
 
Darkarmyofone

Darkarmyofone

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FIGURED IT OUT!

look at the plug that goes to the MOTHERBOARD, see that GREEN wire?

ground it. just stick a peice of metal in the two coresponding holes in the plastic plug, like a bent peice of wire or something. this brings the PSU out of standby.

good luck!...ahhh someone beat me to it by a few seconds

Dark
 
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