DC motor driver with galvanic isolation using an optocoupler
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DC motor driver with galvanic isolation using an optocoupler
This opto-isolated motor driver uses a PC817 optocoupler to safely interface low-voltage logic with a 12V motor circuit. The input signal from the 74HCT14 drives the optocoupler’s LED through resistor R1 (1kΩ), allowing current flow of about 4mA. The phototransistor activates and provides base current to the 2N3904 transistor through R2 ...
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