Optocouplers - Phototransistor Output

Optoelectronics is a field of electronics that deals with the generation, emission, transmission, and detection of light. This includes the use of devices such as light-emitting diodes (LEDs), photodiodes, and photovoltaic cells, which are used in a variety of applications, such as lighting, displays, and solar power. An optocoupler, also known as an optoisolator, is a type of device that uses light to electrically isolate two circuits. Optocouplers consist of a light-emitting diode (LED) and a photodetector, such as a phototransistor, which are connected in a way that allows the LED to control the current flow in the photodetector. This allows the optocoupler to transmit a signal from one circuit to the other, without allowing the two circuits to come into direct electrical contact. Optocouplers are commonly used in applications where electrical isolation is needed, such as in power supplies and motor control systems.