ATX PC Power supply Master / Slave controller

Hello all,


I've built a circuit that allows controlling one (or more) ATX Power supplies automatically from one "Master", which automatically turns on the "Slave" PSU(s).

This is done with only a few basic parts.

• 2 Resistors
• 1 Optoisolator
• 1 LED
• 1 Molex 'Male' connector.
• 1 ATX 20/24 pin "Extension" cable

The attached schematic shows the circuit.

Notes: the 470 Ohm resistor can probably be swapped with a 390 Ohm, if none are on-hand...

And the Green LED can be changed to any other kind (also be sure to change the resistor connected to it to match the LED's voltage)


ATX Pinout here:
http://pinouts.ru/Power/atx_v2_pinout.shtml