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Help Piggybacking PSU's ?

E

eighty8fierogt

Limp Gawd
Joined
Sep 23, 2004
Messages
131
Can anyone tell me how to do this so it would run by its self after being plugged into the wall and not connected to the computer?
 
On the ATX 20-pin connection there is going to be a green wire and quite a few black wires. You just need to connect the green to any of the black wires and the power supply will turn on once plugged in. You can use a paperclip or wire to connect the two if needed.
 
Is the clip with the green wire the one that plugs into the mobo? Has about 20 wires coming out of it ?
 
Ok, listen, take the 20-pin connector that connects to the motherboard. I think you are looking at the right one, it should be the connector with a shit load of wires connected to it.

Find the green wire and a black wire, should be one a couple of pins next to it. Take a paperclip, make a "U" shape out of it and shove it in to short the two wires.
 
GRN > BLK as mentioned will turn the supply on
(Power On (POW_ON) signal wire to any Ground (COM))
however I would ask what is it going to be powering?
If its anything other than say pumps, lights, fans, a peltier and even if it is
its likely youd want to synch it with the first PSU in which case

cut and paste 101
----------------------------------------------------------------------------------------------------------
synch 2 PSU each as a seperate bus

1. Hardwired
2. With a relay

or employing a shared bus Like a redundant PSU

1. with resistors
2. with mosfets
3. with diodes (Single Source Fault Tolerant Power Systems)

(3 is slightly outdated now see gee's post > http://hardforum.com/showthread.php?t=776885)

I ran 2 hardwired 400 watts and a large RAID array for 3 years without issue on one of my boards (Abit KR7A)
however it may have been a contributing factor in the death of another board (ECS whatever :p )
though Im not at all sure about that

not running them synchd however certainly corrupted the hell out of the array :p
eventually switched to a Zippy Emacs MR3-6450P N+1
with considerably less total wattage but plenty for what was actually required
with 32A on the +12V rail for the drives and considering the mobo's VRM was powered off the +5V
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if its powering auxillary components not attached to the mobo (not drives for instance)
you dont really have to synch them, but it might be useful ;)
doing the hardwired mod is simple and takes a few minutes, an Xacto and electrical tape, if its a quick a ghetto solution,
a little longer with heatshrink and soldering wires to wires, generally that would be overkill for simply signal wires
but isnt all that hard either and assures a long lasting, trouble free and good contact)
 
Nice one Ice. I thought of that, but I think he would have just been more confused. Also, he might just be using it as a test psu.
 
good point in which case Id substitute a switch for the relay linked above
saves you from having to plug and unplug it,
if it doesnt have a switch already on the back of it that is

that was one of the nicer things about AT power supplies
 
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