Optocoupler Tutorial and Optocoupler Application

An optocoupler is an electric circuit capable of transferring electricity between two parts without letting them touch. While performing element isolation, circuit designers prefer optocouplers over relay components because they are small enough to fit into microcircuit systems.

A non-conductive barrier connects both an optical transmitter and optical receiver to form an optocoupler. Other than being able to handle a maximum of 7500w incoming voltages, an optocoupler also transfers energy between two circuit elements using a beam of light. The barrier connecting the opposite ends of the optocoupler is a transparent material that only conducts light. A darkened and non-conductive case houses the optocoupler’ s physical device which is then attached to an electrical circuit through certain conductors and connections.

An optocoupler’s ability to efficiently transfer electricity is it’s most important feature. You can determine the efficiency of an optocoupler by measuring it’s current transfer ratio. This ratio refers to the difference in current change on the output and the input. Most optocouplers work within a CTR range of 10 to 50 percent.

The ability of optocouplers to separate two circuit elements operating in extreme different voltages is an added advantage that prevents damage to the part working at a lower voltage. Separating two circuit elements also prevents them from damage when there is a power surge. This trait not only makes optocouplers the ideal choice for on/off switches and the transfer of digital data, but also a common electric circuit between a transmitter and a receiver.

As part of the optical transmitter side in optocouplers, light emitting diodes turn into a perfect LED light source with additional voltage. Although incandescent lamps are occasionally used in optocouplers, the LEDs perform better because incadecsent lamps distort signals and last a shorter period despite being enhanced with plastic freeform prisms.

The entire electrical circuit of a house can use optocouplers, including household items and most communication and internet devices. Modern televisions utilize extensive use of optocouplers to separate the parts of the circuit that manage the cable receiver, screen performance, and screen settings.

Voltage Relay
A relay is an electrical switch or component used to break or interrupt a circuit. Voltage relays run according to the preset level of voltage, or the force that drives an electrical current between two points. Optocouplers have many residential, commercial, and industrial applications.