Olin Lathrop wrote:
> Bob Blick wrote:
>> You're out of luck then, the '2331 only has three channels of PWM. You
>> might be able to use the '4331.
> 
> It only has 3 motor control PWM channels, but it also has 2 traditional CCP
> modules.  Basic PWM is all he needs since he's controlling a brushed DC
> motor.  It does mean a little different low level software for at least one
> of the channels, but that could and should be made transparent to the higher
> levels that decide what duty cycle each motor should be driven with.

Good point! But I think it's beginner project so any additional
complexity might not be a good idea. If the electronics is still in the
parts selection phase, go for the '4331.

Limit switches on the movable parts, now there's some complexity that is
probably mandatory :)

Cheerful regards,

Bob
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