What is a Photo coupler?

A photocoupler is an electronic device that connects an input side circuit and an output side circuit through an optical signal. Photo Coupler is derived from "coupling with light". It is sometimes called a photoisolator or optical isolation due to its properties. It is a technology that can work through light without physical contact, and is now an indispensable and valuable part of our daily lives. It is a major feature that it can improve the insulation on both sides of the input and output, and it is widely used because it is less susceptible to noise and is relatively inexpensive.

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