To assign proper credit, I learned that trick from the 264x terminals manufactured by HP in the mid-to-late 70s. In those days most computer fans still used AC motors, so HP operated 240 VAC muffin fans at 120 VAC to exhaust the terminal heat in a virtually silent fashion. Modern (brushless DC motor) computer fans can be similarly tamed by reduced voltage, or by PWM.
John On 7/8/2011 5:59 PM, ron minnich wrote: > What you see strapped to it is a 12V fan from a dell desktop which I > ran at 5V, not 12V (a trick I learned from John DeGood). Very little > air had to move, it was noiseless, and it all cooled right down. You > don't need huge noisy fans in all cases.
