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Need DC Power supply help
A while back I had a cooling fan thread going. I never did
solve my "cool and quiet" problem. I built a hood for my
10 gallon with a 2x36 BrightKit that was mostly air. I used
pegboard for the sides, because it has holes already drilled,
and the top was a grate made from walnut that only covered
about 20% of the area. Even with this very light hood and
the ballast mounted outside the hood entirely those lights
heated the 10 up from 76 to 81 F during the day. I'm currently
cooling it with a 10 inch Windmere clip-on fan, as seen at WalMart.
At least it is quieter than a RadioShack AC cooling fan, which
tends to have a high harmonic like a jet preparing for takeoff.
My problem is that I know nothing about electronics and a circuit
diagram looks like Egyptian hieroglyphics to me. I went to
radio shack to see about power supplies. Very expensive. Draw
lots of power. Make a lot of heat. Not what I am looking for.
Then I saw a page on the web where a guy used LEDs for a
night-light. Used a 12VDC 500mA power supply he bought
someplace for less than $5. Clearly, he was not shopping at
RadioShack. I hear all the time of people using PC cooling
fans. These fans are small and quiet, but they generally take
3VDC or 12VDC power, and I don't know how to supply them.
Somebody have mercy and clue me in on where I can buy
a power supply that runs on 120VAC, outputs 12VDC with
enough amps to run a small fan, does not use a lot of power,
and doesn't get very hot. Part numbers would be nice.
I'd be grateful.