Reusing Old PC Power Supply: Making Voltage Source & Safety Tips

AI Thread Summary
Reusing an old PC power supply can be a practical way to create a simple voltage source. To safely access the voltage from the cables, users should identify the color-coded wires that correspond to specific voltages, such as 12V DC. Caution is advised, as short-circuiting the output may trigger a crowbar breaker, which requires unplugging and re-plugging to reset. It's important to understand the power supply's specifications, including its wattage and amperage limits. Proper handling and knowledge of the power supply's wiring can ensure a safe and effective reuse.
Bassalisk
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Hello,

I just stumbled upon an old PC power supply. I thought it would be a good idea to reuse it. I am thinking making out of it a simple voltage source, as it is already voltage source.

Can somebody explain me how can I safely get that voltage from those hanging cables that go into HDDs, CD roms etc. And would anything special happen if I accidentally short circuit that output(12 V DC or so).

Voltage source is pretty old, it has 175 W and a bunch of other technical stuff written on it. Peak amperage, voltage etc. If you are interested I can write that down too.
 
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You should just Google "PSU" and find out which colors (the leads are color-coded) correspond to which voltages. That will let you know which wires to isolate for your use(s). Have fun.
 
turbo said:
You should just Google "PSU" and find out which colors (the leads are color-coded) correspond to which voltages. That will let you know which wires to isolate for your use(s). Have fun.

Thank you (:
 
I have seen some supplies that have a crow bar type of breaker in them that does not reset until you unplug and plug back in.

so if you short something out and it doesn't work, try unplugging it for a few seconds and plugging back in.
 
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