ATX PSU mods

Build two, and wire in series. You will have close enough to 28V at 20A. You
will need to isolate the PCB from the case off one of the power supplies.

On Mon, 17 Oct 2005 18:25:54 +1000, Alan Peake
composed:



I can't see that an ATX PSU would be any different, except that you'd
need to either short the PS_ON pin to ground permanently, or install
an SPST switch to switch the PSU on and off.

-- Franc Zabkar

Please remove one 'i' from my address when replying by email.

In an ATX PSU, the "on" signal is momentary - so a fixed wire or toggle
switch won't do. A push-button would sffice.

Actually a fixed wire "does" fine.

finger to keyboard and composed:



The case button is momentary, but the motherboard's PS_ON output is
not.

See http://www.pavouk.comp.cz/hw/en_atxps.html

When I power up a new system for the first time, I use a jumper wire
between the PS_ON and Ground pins. The only load connected to the PSU
at this time is an expendable HD.



-- Franc Zabkar

Please remove one 'i' from my address when replying by email.

http://www.epanorama.net/links/psu_switching.html

Ah! Excellent - just what I was looking for - Google never found it though.
Alan

Yes it did , under ham atx converted power supply :)

Damn! Why didn't I think of that :)