ceh:

that is a good URL... I forgot to mention about some (a lot) of
supplies needing the "power good" signal before they even function...

Warmest regards,
John

"ceh" wrote in message
...

"Russ" wrote in message
...
On 1 Jun 2005 17:16:26 -0500, wrote:

For testing purposes, I'd like to make an PC power supply operate
when
NOT installed in a PC. I've heard that the AT supply needs at least
SOME load on its 5-volt output before it will operate; is an ampere
or two sufficient?

For ATX supplies, I visited a friendly computer-repair store today
and
examined the "cheater" into which they plugged UNconnected ATX
supplies;
it had three pairs of connections:
1) A jumper from Ground to PS-ON
2) an LED and resistor from PowerOK to Ground
3) two wires from +5V and ground going into something about the
size
of a small box of matches which was shrink-wrapped to the cable

They wouldn't let me disassemble it !-)
Was there probably a 5-ohm resistor in that box?

Hi Myron, how's the new QTH going?

Plug in an old HD. It should provide enough of a load to get the PS
started and regulating.

Russ - kf4wxd

This link is a good one for using PC power supplies. It
works great. I did it.

Charles, ka8jvx

http://antennex.com/preview/archive3/powers.htm