Optocouplers are used in many industries to isolate an electrical signal between two elements of a circuit. There are many situations where signals and data need to be transferred from one system to another within a piece of electronic equipment without making a direct electrical connection. This is often driven by different components in a system operating at significantly different voltage potentials. Optocouplers convert an electrical signal to an optical signal using an LED and sensor to transmit across an air gap. The transmitted signal is then converted back from an optical to an electrical signal.
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