This Design Idea is a solid state relay (SSR) which uses a triac to switch AC loads at high current. There are plenty of simple SSR circuits available. But this may be the simplest circuit that achieves turn-on and turn-off only when the AC line voltage is near zero. Figure 1 AC SSR schematic […]
Simple SSR has zero-cross on/off switching Read More »
Introduction Optocouplers, also known as opto-isolators, are components that transfer electrical signals between two isolated circuits by using infrared light. As an isolator, an optocoupler can prevent high voltages from affecting the side of the circuit receiving the signal. Transferring signals over a light barrier by using an infrared light-emitting diode and a light-sensitive product,
Guidelines for reading an optocoupler datasheet Read More »
