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PSU Output leads? #132189
05/31/05 03:21 AM
05/31/05 03:21 AM
Trumpy  Offline
OP
Member
Joined: Jul 2002
Posts: 8,260
SI,New Zealand
Just a quick question.
Which of the output leads from a PSU are the 12V and 5V leads?.
As in the red wires and the yellow wires.
I used to know this off-by-heart, but I'll be blowed if I can remember now.
I'm assuming that the Red wires are the 12VDC wires and the Yellow wires are the 5VDC wires.
Can anyone confirm this, or on the other hand, tell me otherwise?.

Cheers,
Mike.
[Linked Image]

[This message has been edited by Trumpy (edited 05-31-2005).]

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Re: PSU Output leads? #132190
05/31/05 06:34 AM
05/31/05 06:34 AM
C
chipmunk  Offline
Member
Joined: Jul 2004
Posts: 145
Southampton, UK
The yellow is +12v, the red is +5v.
Other wires potentially of interest:
Brown: +3.3v
Blue: -12v
White: -5v
Green:PS_ON, [Short to ground to turn the PSU ON]
Black: Ground
Purple: +5v Standby [permanently on while AC Supply is live]
Grey: Power good signal from PSU

These apply only to ATX power supplies, and some manufacturer specific ones, [eg dell etc.] may be different, even in a dangerous way. However, the +5v=red and +12v=yellow seem to be universal.
(Edit: I found a good page of information here .
The info may be slightly out of date as some of the modern PSUs don't supply the negative voltages which were only used for serial ports, and there may be extra connectors for more modern higher power motherboards)

[This message has been edited by chipmunk (edited 05-31-2005).]

Re: PSU Output leads? #132191
05/31/05 08:49 AM
05/31/05 08:49 AM
Trumpy  Offline
OP
Member
Joined: Jul 2002
Posts: 8,260
SI,New Zealand
Cool,
Thanks Chipmunk,
Just wanted to make sure. [Linked Image]

Re: PSU Output leads? #132192
05/31/05 11:52 AM
05/31/05 11:52 AM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,348
Estero,Fl,usa
PC supplies are pretty good for other uses but be aware some older designs will not start without a load.


Greg Fretwell

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