ATX power supply to bench supply conversion

Um. What's your actual question? Your colour coding looks correct at a glance, so you know which voltages should be on which wires. As you guessed, PG = "power good", so all you need to do it short the grey wire to a black wire (you can use a 1K resistor if you're feeling paranoid), & the it'll power up just fine. I have a couple of PC PSUs set up the same way on my own bench.

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I guess it is ok; however, every single site I go to does not show this pin out or color coding for an ATX power supply. Real quick, Blue is -12V on every site that I have seen...among others.

The question I really wanted to ask concerned the brown wires. Not sure what they are supposed to be. The board says P/C and F/C. If shorting the grey wire to ground is all I need to do, I will set that up and just measure them with a Fluke.

On 1 Apr 2007 21:24:54 -0700, "Kingcosmos" put finger to keyboard and composed:

Power/Control ??? Fan/Control ???

- Franc Zabkar

A 140 watt supply in an industrial PC? :) Maybe it's out of an Apple?

That's what I'd do.

Success!

The grey wire appears to be power good so that should be an output. I connected the only +5V coming up (which I think is the standby voltage) to the brown wire P/C (I agree-- power control), and the rest of the rails came up.

Everything looks good. Still not sure about what the supply actually is.

On 3 Apr 2007 18:00:14 -0700, "Kingcosmos" put finger to keyboard and composed:

In a regular ATX PSU, the PS_ON pin is shorted to ground to turn on the supply.

Could the 1-wire 18V rail be for an LCD panel or touch screen ??? Point of Sale system ???

- Franc Zabkar

Sure! We ship industrial nema-4 systems with even less power. 50-80 watt power supplies and mobile processors.