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Date Posted: 02:49:33 09/18/01 Tue
Author: Alexey Danilchenko
Subject: PC power supply in Mac

I'm investigating a possibility to use PC power supplies in Mac. The only type of PC PSU that does all nice Mac things like soft power-up/down is ATX power supply.

Surprisingly I found that according specs ATX PSU provides exactly the same low-level voltage as Mac (let say 630's PSU) to the board to make it possible to do soft power-up.

Now here's my question. Has anybody tried it yet? Was it succesful? Or perhaps anyone can explain which mechanism is used in Mac's PSU to turn the PSU on? PC's ATX PSU uses open-collector scheme to do this task.

Alex

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