Optocoupling devices work as logic level changeovers between two circuits, It has the ability to block noise transfer across the integrated circuits, for isolating logic levels from high voltage AC line, and for eliminating ground loops. Optocouplers, also known as opto-isolators, uses infrared light to transfer electrical signals between two electrically isolated circuits and are commonly classified by their photosensitive output device What is an Optocoupler? An optocoupler (also called an opto-isolator, photo-coupler, or optical. Optocouplers become specifically useful where an electrical signal is required to be sent across two circuit stages, but with an extreme degree of electrical isolation across the stages. light-emitting diodes) and light-sensitive devices (e. light-sensitive triodes) assembled and coupled by light to form an electrical-optical and optical-electrical conversion device. It can be separated as OPTO + COUPLER. In brief, a light source is used as a link between two isolated circuits. In terms of textual Representation: An. In this article we'll look at how they are used to control circuits, how they work and also how to design some simple optocoupler circuits to show the working principle. Scroll to the bottom to watch the YouTube tutorial. These versatile devices play an important role in modern electronics by providing galvanic isolation.