Some comments on this one if you please ...

I am using the PWM facility of a pic to drive an H bridge for a DC motor
in which I need both forward and reverse.

However, I now have an application where I only want to drive a motor
forward but still vary its speed.

Can I simply use a single transistor  sufficiently rated for current and
just
turn it on off at the base ??  If I can, could I also parallel the
transistors
to spread the current sharing ??

Thanks

Steve




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