AVR-Chat

>  > ... a simple PWM controller ... Using a brushless DC motor, [] the 
> speed is locked to the basic frequency of the power waveform.
> 
> Huh?  DC power waveform?  Please explain.
> 
> 
> Tom
> 
> 

Easiest way is to think of it as you would a stepper motor which is fed with 3 
phases. Not exactly correct but a useful starting point to get your head around 
the concept. If you want to go deeper google brushless DC motor theory.

If you don't want to spend much then the Dremmel idea is a good / quick/ cheap one.

Cheers

Don