[Santa Fe Al]

Hi Guys,

I've got a brand new ATX 450 watt PS. I also have a couple of older ATX PS's. I tried them all.

I AM NOT trying to Daisy-chain them. I am just trying to get + 5 VDC and + 12 VDC output.

Anyway, the aim is to run 2 or 3 12VDC fans and 5 VDC B.O.B., E-Stop, Reed Relays and LEDS. There won't be anything else connected to the PS

Anyway, I've tried connecting 2 ohms (20 watt) resistor to one of the Black and one of the Red wires. I read that the Power supply needs this to keep it active and not shut down.

Then, I'd take a reading on the 12 VDC (Yellow & Black wires).

NOTHING - NADA - ZIP - NILL

Then I tried 10 ohms and then 20 ohms. All on the Red and Black wires.

NOTHING - NADA - ZIP - NILL

As far as I know:
Black = Ground (Negative)
Red = 5 VDC
Yellow = 12 VDC

Can (Will) anyone help me figure this out so I can get my 5 & 12 VDC outputs? I know I'm missing something, but haven't been able to find out what.

I've spent several hours on the Zone and on the Internet Googling for the information I need. All I've found has to do with daisy chaining the PS's. Even so, as explained, the resistor should do the trick. No luck.

http://www.procooling.com/index.php?...s&disp=52&pg=1
http://www.antennex.com/preview/archive3/powers.htm

Plus the Sticky here on the Zone.

Thanks to all and any who answer,

Al

[Santa Fe Al]

Hi All,

Me again.

Just found out that the Orange wire needs to be connected to the Red (+ 5 VDC) wire to show Power is Good. I guess it's called the + 5 VDC Signal Wire.

Did that and still nothing.

Found this site:

http://www.instructables.com/id/ATX-...ly-Conversion/


Al

[Al_The_Man]

Did you take pin 14 to common (gnd)? This turns the supply on normally when used in the standby state.
http://www.helpwithpcs.com/courses/p...nc-pinouts.htm
IIRC it is just a momentary to gnd.
Al.

[Santa Fe Al]

Did you take pin 14 to common (gnd)? This turns the supply on normally when used in the standby state.
http://www.helpwithpcs.com/courses/p...nc-pinouts.htm
IIRC it is just a momentary to gnd.
Al.

Thanks Al,

I took the Green wire (Pin 14) to Ground and everything worked. I got 12.1 VDC and 4.90 VDC.

PS Fan is not coming on. I hope it's because it is temperature controlled.

However, I do need to keep the Green wire connected to Ground in order to keep the power on.

The Orange wire does not need to be hooked up as one of my searches stated. In my case, it is 3.3 VDC. Also, no resistors required.

This was tested by me just a few minutes ago.

I understand that you said the Green wire is only momentary, but it must stay connected to get continuous power.

If there is anything else I will need to know, please feel free to tell me.
:cheers::wee:
Thanks again,

Al

[Al_The_Man]

Normally I would expect the fan to come on right away, can you see where it is fed from in the PS if you take the cover off?
As a last resort you could always hook it direct to the 12v output.
Al.

[Santa Fe Al]

Normally I would expect the fan to come on right away, can you see where it is fed from in the PS if you take the cover off?
As a last resort you could always hook it direct to the 12v output.
Al.

Hi Al,

Got it working. Actually, it was working. It's just V-E-R-Y quiet. Also, because of the lighting, I couldn't see it spinning. I lit it up with a flash light and lo-and-behold, it was spinning.

Thanks once again, Al. At this rate, you may have to charge me for tutorials as a student of yours. LOL

Thanks,

Al