I had a brain fart about the voltage, sheesh. Noise might be an issue, the unit itself might make a high pitched whine apart from audio gear interference. But apart from that, a PWM controller might be an interesting project - liberating us from the restriction of *only* three fan speeds :) alistair
On 2013-04-08, at 10:32 PM, David Beierl wrote: >> David, know off hand what the voltage ends up being after going through the low speed resistor? > > That would depend on how fast the motor is turning. Ok, that was a uSoft answer (correct but useless) sorry. It doesn't matter because the PWM will supply full voltage all the time, and control the power available to the motor by changing the duty cycle of the pulse train. > > A possible issue with these things would be noise injection into the audio gear, dunno if it would be a problem in practice. > > Yrs, > d |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.