I have built a simple robot that goes forward, reverse, left, right and stop, controlled by an old DVD remote. Everything works fine if I leave my analogWrite pin speed at either 0 or 255. Once I change the speed in analogWrite, the IR codes received from the remote seem to change. Example - Forward…

IR Remote codes change when changing speed using Arduino Motor Shield.

system April 8, 2014, 11:45pm 5

Switching to an H-Bridge fixed the speed/PWM issue. Don't know why, but it works now.

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