In this episode, Chris turns a salvaged ATX power supply into a useful benchtop power supply.

The wire color codes for most ATX supplies are as follows:

Yellow = +12VDC
Red = +5VDC
Orange = +3.3VDC
Black = Negative / Ground
Blue = -12VDC
Green = Power Supply On (connect to switch)
Brown = +3.3VDC Sense (connect to +3.3VDC suppy)
Grey = Power Supply Good (connect to + of LED, use resistor)
Purple = +5VDC Standby Power (connect to + of LED, use resistor and + of USB)

Your mileage may vary, please review the tech sheet for your individual PSU if in doubt.

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