bidirectional stepper driver

can be toggled(using the second button) to move a stepper motor one half step either clockwise or counter clockwise each time a pulse from a microcontroller (simulated using the first button) is received Everycircuit does not have multiplexers, so I used a relay in this circuit, but if you want to build it, you will have to replace it with a mux the 4 outputs should be used to drive the 4 coil ends of the motor, with something like the L293D being used as an intermediate. Th benefit of this circuit is that it now only takes two mcu pins to drive each stepper, where you would need 4 if you were controlling each coil directly

published 1 year ago