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computer power supply

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dressur4

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I have several computer power supplies from 1U rack servers (old PIIIs) and desktops. I know if you short the green wire and the black wire next to the green on the mother board connector,, you can turn it on and off. BUT will a server power supply that is powering 4 SCSI hard drives and the motherboarsd, power a 2 watt module? Have any of you guys used a PC power supply for the 5v or 12v supply for lasers? I want a 12v supply with high regulation. thanks for any replies. Tom.
 
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paul1598419

paul1598419

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I have not used one for that purpose, myself. The power supplies available on eBay are usually so inexpensive, I normally go there. If the supply is filtered well and does not exceed the volage requirements for the driver, it should work if it can supply enough current.
 
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dressur4

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Yes I am going to put a meter on it and see what voltage it really puts out. I think it should be steady at 12v being a computer. but i don't know.
 
ZRaffleticket

ZRaffleticket

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Tolerance is supposed to be within 5%. Though it's a great idea to measure and be sure ^
 
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dressur4

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Yes I will test it. It is a real nice compact supply but it ran 4 SCSI drives and the motherboard I don't know how much current each one draws but I think the power supply iss 220 watts or so. It is nice and small but heavy
 
lasersbee

lasersbee

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The specs should be written on the PS label.
Always good to check those specs with a DMM


Jerry
 
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Cyparagon

Cyparagon

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They're fine. They provide a stable 12V. Any enerprise-class stuff is good quality, although yours sound like they are exceedingly old. Modern 2kW PSUs are not particularly heavy. 220W isn't nearly enough to power any modern rack equipment.
 
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dressur4

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Right. It came out of a singke rack pentium III server but fora 2 watt laser. I am thinking it should be enough. And it's free.
 
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