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Pin outs for AT power supply

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  • Pin outs for AT power supply

    Could someone please give the voltage assignments for the motherboard connectors for an AT type power supply? I am ready to complete my DC - DC project except for this part. Thanks.

  • #2
    With the key facing toward you,you have.....
    +5v,+5v,+5v,-5v,G,G,G,G,-12v,+12v,+5v,PG(+5v via a 5k resistor). Hope this helps.
    http://mp3gt.mp3car.com/

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    • #3
      Thanks a bunch snakebite, that's exactly what I needed!

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      • #4
        OK, I've got the supply built, but what's the
        PG wire for (I assume this is power good?).
        Is this a signal from the PSU to motherboard or from motherboard to PSU?
        Cheers.

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        • #5
          PG is a signal from the PSU to the MB, telling the MB that everything is OK (all voltages are good and within regulation) and it's safe to boot.

          You can tie this to +5V through a resistor (1k - 5k works fine) to "fake" the PG signal. Some motherboards won't boot without this tied high, while others don't seem to care either way.

          --Jason
          http://jump.to/m2pc
          Jason Johnson
          Yorba Linda, California
          http://www.m2pc.com

          MPC Phase IV - *** PENDING ***

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          • #6
            for at and atx power connection pinouts try this site
            http://www.upgradeyourpc.com/powersupplyconn.htm

            even has disk drive power connectors
            Volvo V40 Phase 2 2002. T4 turbo upgrade.... currently no mp3 or carputer..... researching options

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