PC921, HIGH POWER OPIC PHOTOCOUPLER
Photocoupler is also called opto-isolator is a semiconductor device that is used to transfer the electrical signal from one circuit to another circuit while keeping the circuits electrically isolated. Two main elements that are required for a Photocoupler are Light emitter and Light detector. Light emitter circuit is on the input side and it takes input signal and converts it into light signal. while the light detector, which usually represents the output side of the Photocoupler detects the light and translates the light again into electrical signal while maintaining the electrical isolation. Detector is generally a photo diode or a photo transistor.
