The SN754410 driver I am using works fine on a breadboard powered by a 12v, 500ma wall wort but burns very hot and fails to run the bipolar stepper when wired to my project board, which has a 12v, 8amp supply. I am assuming that the current must be limited? If so, can this be accomplished with PWM? …

PWM to limit current to bipolar stepper

system March 29, 2013, 12:47am 15

When you say "simple fixed PWM modulation", does that mean a micro second delay?

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