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› Question on 12VDC computer power supply
10-10-2005 08:15 PM  12 years agoPost 1
Riverman

rrApprentice

Peace River, Alberta

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Hello

I was hoping to utilize an extra computer power supply I have lying around to power my 12V heli battery charger indoors. I need to figure out how to turn in on when not hooked up to the computer and the comps remote power switch. The best I can ascertain from the data plate on the cover of the power supply, the gray wire on the main plug to the mother board is the one I am looking to jump. It is labelled P.G. Signal. Is the a correct assumption? I have been trying to jump this wire to various black ground wires without any luck.
Does anyone have any experience in using these power supplies outside of their intended use? Please fell free to PM me too.

Thanks, Brett

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10-10-2005 08:19 PM  12 years agoPost 2
IMZ Caliber

rrApprentice

Chesapeake, VA USA

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My ATX powersupply required me to connect the grey to a ground lead to turn on the powersupply. Also you will need to put a load on the 5v side to have the powersupply produce full power on the 12v leads. A simple #1157 tail light bulb should do the trick there as well as it will give you an indicator that the PS is on.

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10-10-2005 11:49 PM  12 years agoPost 3
OsiViper

rrVeteran

Farmington, NM

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The sensor wire for the PS to turn it on is green not grey

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10-11-2005 12:54 AM  12 years agoPost 4
willard

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Indianapolis, Indiana, USA

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if it is an atx power supply, pentium 3 compatible, all you need to do is connect two wires together on the motherboard cable to fool the power supply into thinking it is connected to a motherboard.

that is all, no loads are required on the 5v line with a p3 compatible atx power supply.

See details here: http://www.rcgroups.com/forums/showthread.php?t=368639

I have done this with a $22 dollar atx supply from compusa and get 12.06 volts, 7 amps

Its been going strong for 3 months

Will

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10-11-2005 02:24 AM  12 years agoPost 5
IMZ Caliber

rrApprentice

Chesapeake, VA USA

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Or the more simple way is to buy a AT power supply that has a switch. The one that i use to use was good for 10 amps. That one did need a load on the 5v side. The ATX powersupply i used later had the poweron lead as grey as well as it needed the load on the 5v side as well. with the load it was able to produce the full 15 amps that it was rated for. Without the load it would only push 2 amps.

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10-11-2005 02:29 AM  12 years agoPost 6
OsiViper

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Farmington, NM

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Right now i have a PS that will push 27 amps at 12.42 volts.

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10-11-2005 02:34 AM  12 years agoPost 7
policerescue620

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las vegas, nevada

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I now have a astron 50 amp continuous huge freeking power supply now with lighted amp and voltage meters... also using it with cb "stuff" hahaha got it at a flee market here for 25 bucks!!!

adding a breath of fresh air daily...!!!

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10-11-2005 02:08 PM  12 years agoPost 8
IMZ Caliber

rrApprentice

Chesapeake, VA USA

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I currently have left the computer PS system myself as well. I use a Pyramid 25A variable voltage(5-16v) powersupply and a radio shack 25amp power supply (13.8 fixed voltage). The radio shack one was $25 as it was being discontinued for the newer one that they have now. The pyramid was $90 but it works great for setting up the heli.

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