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View Full Version : Can ATX = PC/XT power supplies?



Nic
08-09-2007, 01:22 PM
Hello,

I need some info regarding the possibility of converting an ATX power supply so that it may replace a XT power supply. The XT power supply for the project I am working on has gone bad. It isn't producing the proper voltage anymore and I was instructed to replace it. My boss, however, wants me to try converting an ATX power supply to use in place of the pre-existing PC/XT. Is this even possible? if so, how do I do it?

Hagar
08-09-2007, 01:37 PM
First you need to 'jumpstart' the ATX supply. The signal 'ps_on' must be shorted to COM. You must make a switch to do this.
http://pinouts.ru/Power/atx_v2_pinout.shtml

Then you need to rewire the connectors.
http://www.technick.net/public/code/cp_dpage.php?aiocp_dp=pinconmth_at_power

One problem may be that many of todays ATX powersupplies do not have -5V and -12V outputs.