[kc-bolen]

The short story: I have an old Compaq, 20 pin connector, 250W power supply that I want to use to run several 3", 12v, .4 mA cooling fans. Which pins do I shunt, use as a switch, to make the ps always hot when ac power is applied to the 115v power cord.
The long story: We have hot water baseboard heat which has always been less than satisfactory. Last year I installed a ps (which has a switch) to power pc cooling fans in 7 of the baseboard units which has greatly increased the comfort level while decreasing the utility cost. I have it wired so the fans come on when the hot water circulating pump starts. I've used all the 12v leads on the present ps. I have 8 more heat exchangers that need the fans installed but can't figure how to make the ps always hot so it too will be dependent on my pump cycles.
Ken B

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http://www.instructa...egular-DC-Powe/ specifically step 2 in that instructable..

[dsenette]

http://www.instructa...egular-DC-Powe/ specifically step 2 in that instructable..

[kc-bolen]

Thank you! It works great. It's amazing how easy everything is when you find somebody that knows how!

[dsenette]

hehe there's a philisophical theory that states that everything that could possibly be known is already known...it's just a matter of collecting the data into a single source