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

Dave Everett (deverett nospam at
Wed, 19 May 1999 20:19:28 +1000

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?

Dave Everett

Domestic Droids Website