On Nov 11, 2005, at 8:25 PM, Andrew Kieran wrote:

>> I am trying to control two L298 motor drivers (need 4 PWM outputs)
>> from a PIC18F2620 MCU. However,the PIC only has 2 independent
>> hardware PWM channels.
>
> I'm using two PWM channels and some 74HCxx glue logic to take
> one PWM signal for each motor and apply it to the correct
> high/low MOSFET combination.
>
I didn't look at Andrew's design in detail, but he certainly has
the right idea.  If you have two motors, you only need two PWM
channels; you don't need to PWM both sides of each motor...

BillW

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