Dc opto isolator8/19/2023 These opto isolator circuits are typically used for AC power control applications. The triacs or SCR conducts for both half cycles of AC mains cycle and thus, using zero crossing detection technique full power to the load can be supplied by avoiding heavy inrush currents which occurs due to inductive load switching. These types of opto isolator circuit can be used for controlling the AC loads such as motors, lamps and so on. The simple solid state relay basis can be formed using optocoupler configuration shown in the above figure. So, opto isolator circuit can be used to isolate the high or rapidly changing voltages of one side of circuit causing damage to the components on the other side of the circuit. The rapidly changing voltages or other electrical parameters on one side of the circuit may cause damage to components on the other side of the circuit due to direct electrical contact. These Opto-isolator circuits are used generally for transferring digital signals, but can be used to transfer analog signals with a few techniques. In fact, there are few other sources such as LED, lamp, etc., which are detected by sensors such as photo diode, LASCR, photoresistor, and so on. In general, combination of LED (source) and phototransistor (sensor) is used in typical Opto-isolator IC packed in a single opaque package. It is one of electrical and electronics components used for transferring electrical signals from one circuit to another circuit (which are isolated) using light. In electronics, an Opto isolator is also termed as an optical isolator or photocoupler or Optocoupler. In this article, let us discuss about Opto isolator circuit working and applications. Similarly, every remote operated system uses either RF or IR or laser or etc., for transmitting electrical signals from one circuit to another circuit. If we consider the television system operated using IR, then the infrared remote which consists of IR emitter is used to transmit electrical signal from remote circuit to the TV internal circuit. In general, electrical signals are transmitted from one circuit to another circuit using various components or mediums.
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