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need help with 'dc converter'

Discussion in 'Electronic Basics' started by OBL, Sep 9, 2003.

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  1. OBL

    OBL Guest


    i am trying to figure out how to power up an AT power supply.
    i just want to use it as a ac/dc converter, but dont' know the wiring config
    to get it to power up.

    any ideas?

    thanks in advance,

  2. Hi Oliver,

    The AT power supply powers on as soon as you plug it into the outlet and
    flip the mains switch.

    If it's an ATX, then, after you plug it into the outlet and flip the switch
    (if any), you need to connect to the ground the "power on" pin in the ATX
    connector. Google for "ATX connector pinout" for details.

    Hope it helps,
  3. OBL

    OBL Guest

    it is an AT supply...there are 2 motherboard connectors instead of the atx's

    there is no switch on it (alas) was normally powerd up from a soft
    power on the front of the computer

    i gotta get this thing going...
    i dont' wanna experiment too much cos it's not fused


    please help
  4. cirip

    cirip Guest

    Hmmm, I see.

    Does not seem to be a regular AT. Maybe it is something custom. Sorry, no
    idea in this case.

    Good luck,
  5. Steve

    Steve Guest

    you may already have the answer, chances are the switch shorted a
    connection on the motherboard power connector and this turns on the
    supply. Some supplys have a sticker on the side that will tell you
    what pins to short. Eg; the one I'm looking at now has in a column
    labeled "GREEN - PS-ON". I ground the green wire and away she goes!
  6. OBL

    OBL Guest

    yes. most def the mobo power used to turn it on.

    no green wire...
    no sticker...

    alot of colors..o my.
  7. OBL

    OBL Guest

    all you electronics ppl in here and noone knows...

  8. John G

    John G Guest

    Of course you did not tell us where it came from.
    Lots of AT Compaq supplies, for instance, have 2 white wires that turn it on
    and off and I am sure there are other variations in volume brands.
  9. You have not provided enough information for us to say anything useful.
    Somebody here is sure to know, but you have to know what you are saying first.


    Chip Shults
    My robotics, space and CGI web page -
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