How to Check an optocoupler.

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How to Check an optocoupler. A common type of Optocoupler consists of an LED and a photo-transistor in the same opaque package. In electronics, an optocoupler, also called an Photocoupler or optical isolator is a component that transfers electrical signals between two isolated circuits by using light. Optocoupler prevent high voltages from affecting the system receiving the signal.

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