An Optocoupler (also known as an opto-isolator) is an electronic component used to provide electrical isolation between input and output circuits while allowing signal transmission. It uses an internal LED and a photosensitive device to transfer signals optically, preventing high voltages or noise from affecting sensitive control circuits.
Optocouplers are widely used in industrial automation, power electronics, and microcontroller-based systems where safety, noise immunity, and signal isolation are critical.
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