Triac tester allows for manual or automatic operation

摘要

Triacs are bidirectional ac switches that can control loads with currents as high as 25A rms at voltages as high as 600Y They find wide use in motor-speed, heater, and incandescent-lamp controls. Logic triacs are especially attractive for microcontroller-driven devices. You can activate a triac directly from microcontroller-output ports because of the triac's trigger current of only 3 to 10 mA. As with any electronic device, triacs can have some internal problems that you can detect before using them in a design.