Andy mentioned a key point:  what resolution does the application need?

Doug

-----Original Message-----
From: Andy Kunz [mailto:montana@FAST.NET]
Sent: Wednesday, January 15, 2003 5:20 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE]:PWM and DC Motors.


>The 1230Hz figure sounds about right from memory, and should be fine for
>driving a motor.  The only drawback at that frequency might be an annoying
>audible whine.  At a few 100Hz PWM frequency you can do it in software and
>therefore drive a bunch of motors from the same PIC.

I do 2.8kHz in software just fine, while measuring a RC servo input signal
with 6uS resolution.

Andy

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