A very simple dual channel optical isolated relay module. The input can be driven from 3. The relays are 5 Volt making this compatible with Arduino and Raspberry Pi. The circuit above is a two chanel relay switch. The dual-channel relay module is more or less the same as a single-channel relay module, but with some extra features like optical isolation. They're perfectly suited for industrial automation, process and power engineering, rail systems, shipbuilding, and control cabinet manufacturing. 3V or 5V logic signals from a microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM. In the following post I have explained how to drive a relay by using an isolated method, or through an optocoupler device. We will learn three methods, first method is by connecting relay directly with the optocoupler output pins, second method is by using external PNP transistors, and third method. SunFounder creates smart hardware and kits for learning Raspberry Pi, Arduino, ESP32—blending cutting-edge tech with hands-on learning.
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