02-18-2008, 08:47 AM
Join Date: Apr 2005
Location: Brentwood, CA, USA
iTrader Positive Rating: 100%
| | Re: NOW it's getting costly - ?
Most computer fans run on DC power, not AC, and most are 12 volt DC. So, you need a small power supply for them too. I use one I purchased at RadioShack, that is a variable output voltage. Then I operate the fan at about 8 volts instead of 12 volts, to slow it down and reduce the noise. Wiring it up is very simple - if the fan runs clockwise when you want it to run counterclockwise, just reverse the connection at the fan. Mine runs 24 hours a day.