I have a problem with my Pololu DRV8835 module whereby the motors turn on briefly when power is applied to the chip. Can’t really have a robot shooting off every time it is switched on.
Anybody else experiencing this? What is the remedy?
Looking more closely, the problem is initial noise on the PWM input as the microcontroller powers up. The 8835 seems to be happy with noisy DC as the PWM signal. I’m not sure what I can do about it yet. I haven’t had the problem with full H-Bridge drivers, perhaps since both control inputs can be off, leaving no voltage at the motor. Seems more like good luck.