ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Mini Split voltage
by Garemaret - 06/21/24 04:53 AM
Strobing LEDs
by Anovalight - 06/20/24 03:16 AM
Stuff that happens after we leave
by HotLine1 - 06/17/24 03:53 PM
photocell requirement for metal halide ballasts
by gfretwell - 06/17/24 01:44 PM
Commercial lift stations
by triple - 06/09/24 05:23 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (Scott35), 56 guests, and 8 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#132189 05/31/05 03:21 AM
Joined: Jul 2002
Posts: 8,443
Likes: 3
Trumpy Offline OP
Member
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).]

#132190 05/31/05 06:34 AM
Joined: Jul 2004
Posts: 145
C
Member
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The info may be slightly out of date as some of the modern PSUs don't supply the negative voltages which were only used for serial ports, and there may be extra connectors for more modern higher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).]

#132191 05/31/05 08:49 AM
Joined: Jul 2002
Posts: 8,443
Likes: 3
Trumpy Offline OP
Member
Cool,
Thanks Chipmunk,
Just wanted to make sure. [Linked Image]

#132192 05/31/05 11:52 AM
Joined: Jul 2004
Posts: 9,942
Likes: 34
G
Member
PC supplies are pretty good for other uses but be aware some older designs will not start without a load.


Greg Fretwell

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5