Re: [mowbot] [OT] Driving 6v DC motor with 12v power supply

dsteink nospam at
Wed, 19 May 1999 08:30:23 -0700

Dave Everett wrote:
> At 03:34 18-05-99 +0100, david steinke wrote:
> >
> >Whoa! Look at any speed controller for RC cars. They are typically 4kz
> >switching frequency. Lower frequencies are worse, higher better. The problem
> >with higher frequencies is the lead inductance, transistor switching times,
> >and flyback damping. A good book is Bob Boucher's (??) Electric Motor
> >Handbook from Astroflight. It discusses at all this.
> My only problem with audio is that if I can hear the motor switching I'm
> probably wasting energy somewhere. Do you have an ISBN for that book David?

ISBN 09644065-0-0. Astroflight ( sells it for $15.

David S.