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Help me install a LED Power Switch on my ATX PSU please!

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Franco B:

--- Quote from: Ed_McCarron on April 16, 2010, 06:00:44 pm ---Perhaps just a standard switch with an external LED/resistor hung across the 12v/gnd rails of the power supply?

--- End quote ---

Thats what I was thinking.

You could use one of those LED holders if it makes mounting easier.

XCVG:

--- Quote from: lilshawn on April 16, 2010, 03:17:46 pm ---this is not what you are looking for. if you are going to switch the "Mains" (AC power) to the power supply you should (read MUST) use a "double pole" switch to disconnect both the live and the neutral wires from the power supply.
--- End quote ---

Why? I've actually seen a power supply where only one line is switched. There's probably a good reason that I haven't remotely thought of though, knowing me.

Also, yeah, that switch won't work.

RandyT:

--- Quote from: XCVG on April 16, 2010, 08:44:04 pm ---
--- Quote from: lilshawn on April 16, 2010, 03:17:46 pm ---this is not what you are looking for. if you are going to switch the "Mains" (AC power) to the power supply you should (read MUST) use a "double pole" switch to disconnect both the live and the neutral wires from the power supply.
--- End quote ---

Why? I've actually seen a power supply where only one line is switched. There's probably a good reason that I haven't remotely thought of though, knowing me.

--- End quote ---

Yeah, light switches in your home only break one wire of the AC, so I don't know why you would need a double pole switch to go this route.

But Ed is the only one here who seems to have understood the OP.  What he said.

RandyT

slapaham:
A bit muddled as to what should have been concluded here! :P Probably me being dumb!

Is it that it would probably be best to get a switch for the power and then get a separate LED powered from molex.

Thanks for all the responses guys - much appreciated! :cheers:

RandyT:
Ok, I'm confused suddenly as well and maybe the other folks were with you if you are indeed talking about AC.  But I get a feeling that you are using some words here that don't really reflect the situation you are asking about.

If you have an ATX power supply, you shouldn't have any view of the AC power, unless you have taken the cover off.  If you are talking about a similar power supply for arcade cabinets, these may have wire terminals for the AC in and the other voltages going out, but this would not be an "ATX" supply.

Without being able to accurately convey your situation, you need to take some pictures and post them if you want good advice.

The thing that causes the confusion is your reference to green and black wires, which on an actual ATX supply, will turn power on and off.  But a 3 prong "mains" socket sounds like AC (and that you have the cover off of the supply).

If you are only powering a PCB and some lights, you should find out why the ATX PSU is coming on immediately (probably green and black jumpered as described above) and that is where you would put your switch.  Then you could run any type of indicator LED ligthing from the +5 or +12 output of the supply.  

Please take a picture so we know what you are asking.

RandyT

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