Educational H-Bridge stepper driver built from discrete components to visualize stepping signals and power electronics basics.
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The wiring complexity is intentional and functional.
This architecture requires 10 direct control lines from the MCU to drive the individual discrete stages (including the 2N2222 pre-drivers and logic-level low-side gates).
Additionally, 3 feedback lines are routed back to the MCU's ADC to read the voltage drop across the 0.1-ohm shunt resistors, allowing for real-time current sensing and active control.
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