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PC Power Supply - Testing LED and DC Motors Question
Donkbaca:
Oh yeah, the power supply is off!
It doesn't provide power until the motherboard turns it on!
riposte_18:
Hey Donkbaca,
Cheers for your help, currently I'm at work, so can't provide pictures, but I'm sure if you imagine the simplest setup to link a molex connector to an LED or a motor, that's pretty much what I've got :P
The reason I ask about the fans is all the big square black fans I've used to assist in exhaust have only ever plugged into the molex connectors of the power supply. I know the CPU fan is powered directly from the motherboard, so that makes sense its power is dependant on the how machine booting up, but the additional exhaust fans only have connectors to the power supply, hence I would expect them to run non-stop if there wasn't some sort of dependancy on another load of the power supply.
Tried the 5v wires too, but no go.
DaOldMan - Thanks for that, that might explain what I need, I'll investigate more and see what I come up with.
Cheers
BobA:
To turn on an ATX power supply without a motherboard the power on pin in the 20 pin connector has to be connected to a ground or common. This is typically been said as short the green wire to ground with a paper clip or wire jumper.
http://www.techpowerup.com/articles/other/22
riposte_18:
Hey Boba,
Yeah, found just that information, and was going to post it here for future searches, but guess you beat me too it!
Thanks all for your help, its probably silly question that appears on this forum on a regular basis, so appreciate all the assistance you guys have provided.
Cheers
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