I have an old 2001-02 hp computer
I have been keeping it for parts.
What is the average voltage and wattage of one of these things?
I have a 48v 300cfm .49amps fan I was trying to figure out how to power.
So i can use a power supply to test all my little IC projects?A computer power supply should have several different rail voltages: +3.3V, +5V, +/-12V:
http://en.wikipedia.org/wiki/Power_supply_rail#ATX_standard
http://www.formfactors.org/developer/specs/ATX12V_PSDG_2_2_public_br2.pdf
I was thinking of the same48 volt supplies aren't as easy to find as 5 or 12 volt ones. They are available, but can be expensive.
Radio Shack sells a 25 volt 450 mA transformer for about $6.50. If you bought two of them, wired their outputs in series with the right phase then you'd have about 50 VAC. Rectify that and you could run your fan.
by Jake Hertz
by Robert Keim
by Aaron Carman