Bench psu build

[roughshawd]

Planning on making a bench power module from KDM 6275h micro ATX 275w P4-12v the sticker says green PS-on...output remote Turns the supply on.

Then it says orange PW-OK output P.G.
What's the orange ? Power OK...? Output power ground?

 

[Bluejets]

Think you've been around long enough now to know....show what you have.

 

[roughshawd]

Think you've been around long enough now to know....show what you have.

 

[Harald Kapp]

You'll find that the ATX power connector is well defined (see e.g. here).
Power good or PW-OK is

A control signal that is low when other outputs have not yet reached, or are about to leave, correct voltages.

 

[roughshawd]

Wanted you to know I learned something... The 4 pin molex is to power a Dc-Dc converter for the low power Pentium 4 cpus which only use a volt or less. I always thought it was a reference line for old 486..duh wrong! It's an old thing, not an an ancient thing...

 

[roughshawd]

Because this is a psu for a more modern approach to power management, it may have used latching technologies and tactal contact switches as intermittent contact, for the power on switch. I would like a good primer on this tech, without all the shift register hoohaw so I don't burn it up with a full time on switch

 

[roughshawd]

What is the latching voltage of a PC momentary power on switch?

 

[roughshawd]

One other debacle on these PWR supplies...

I would assume the ground one uses with each voltage would probably effect the actual signal quite a bit. So assuming I use a case ground( which is what I used to do for power applications only). The ground from a 12v src might effect the 3v signal. So I don't short out, and just to clarify, never use a -12v signal as an earth for a +12v signal ground.

 

[AnalogKid]

PG = Power Good.

ak