DC Motor Drive Circuit

@Muse - The original circuit featured an inverter (NOT gate) directly shorted across its own input and output through an inductor, driving a DC motor in an unintended feedback state where the motor had virtually zero drive voltage across it and stayed completely stalled. This circuit provides the direct, functional opposite: a clean DC drive circuit that actively powers the DC motor #M1. ### How It Works - **Control Input:** The toggle switch #in delivers a solid digital high ($5\text{ V}$) signal. - **Current Limiting & Protection:** Resistor #R1 sets the operating drive current into node #out. - **Motor Operation:** Node #out energizes #M1 against ground, spinning the rotor smoothly at steady-state RPM and generating a clear current trace on the oscilloscope.

published 12 hours ago