What is a Photo coupler?

An optocoupler (also known as an optoisolator) is an electronic component that uses light to transmit electrical signals while providing electrical isolation. This allows signals to be transferred between circuits operating at different voltage levels without direct electrical contact. It typically consists of an LED that emits light and a phototransistor that receives the light and transmits the signal. Optocouplers are used to isolate circuits, prevent electrical interference, and ensure safety, especially in applications where overvoltage protection is required.

Application of Photo coupler

✅ Microcontroller and High Voltage Circuit Interface
An optocoupler is used to interface a microcontroller with a high voltage circuit, providing electrical isolation and protecting the microcontroller from high voltages.
✅ Data Communication Systems
Optocouplers are used in data communication systems to transfer signals safely between circuits with different voltage levels, ensuring secure data transmission and reducing noise interference.
✅ Power Control Devices
Optocouplers provide isolation between control signals and high voltage circuits in power control systems, ensuring safe power regulation and protecting the system from overcurrent or overvoltage.
✅ Power Supply Protection
In power supplies, optocouplers monitor for overvoltage and overcurrent conditions and send signals to protect the system if any abnormalities occur.

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