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Date: Sun, 10 Jul 2011 20:35:44 -0400
From: John DeGood <john@degood.org>
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Subject: Re: [9fans] Plan 9 on VIA C7
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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.