I was working with STK6714AMK4 connected with arduino to make a stepper move with the change of a potentionmeter resistance (stepper knob).
The motor at first worked well but didn't respond to the potentiometer. Anyway, One day after that, I powered the circuit again but the driver got so hot and the motor held at its position with some noise. So, I disconnected it and tried again but the driver wasn't working (I tried the stepper alone and it worked). So, what could be the reason? Can unfiltered power supply destroy such a circuit? (I connected the circuit as shown but didn't connect any capaitor in my circuit)