Optocoupler Tester Circuit
An optocoupler is a simple electronic component that is used to connect separate circuits together by the means of a light-sensitive optical interface. An optocoupler or optoisolator consists of a light emitter, the IR LED, and a light-sensitive receiver which can be a single photo-diode, photo-transistor, photo-resistor, photo-SCR, or a photo-TRIAC. Optocoupler testers are used to check the functionality of any optocoupler receiver.
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