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

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Discussion Overview

The discussion revolves around the reuse of an old PC power supply as a voltage source. Participants explore safety tips for accessing the voltage from the power supply's cables and address concerns regarding potential short circuits.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about safely accessing voltage from the power supply's cables and the implications of accidentally short-circuiting the output.
  • Another participant suggests using online resources to identify the color-coded wires corresponding to different voltages, implying this is a straightforward approach.
  • A later reply mentions that some power supplies may have a crowbar type of breaker that requires unplugging and replugging to reset after a short circuit.

Areas of Agreement / Disagreement

Participants present differing views on safety and functionality, with no consensus reached on the best practices for reusing the power supply.

Contextual Notes

Participants do not provide detailed specifications of the power supply or discuss potential limitations of the approach, such as the age of the power supply or specific safety measures.

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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