@▷ Stepping Motor Driver using XNOR gate | Diagram for Schematic

Stepping Motor Driver using XNOR gate

The circuit is not particularly susceptible to motor transients and supports FULL STEPS FORWARD, FULL STEPS REVERSE, ACTIVE HOLD, and POWER OFF aka RELEASED. If the motor does not turn then swap around the leads of ONE of the two coils. To reverse the sense of the EN signal simply rework the circuit around an XNOR gate. [...]

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http://members.shaw.ca/novotill/StepperDriver/index.htm

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