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What is Microcontroller Optocoupler Driver Circuit about?

This circuit diagram shows an optocoupler used as a driver circuit to isolate a microcontroller from a power circuit. An optocoupler receives a signal from the microcontroller through resistor R1 and uses an LED to transmit a light signal to a phototransistor, which controls the gate of triac Q2 and allows current to flow through triac Q3 to power a 500mA load when triggered by the microcontroller signal. Resistors R2, R3, and R4 provide proper biasing for the triac and phototransistor.

Author

onepointer

Language

EN