![Amazon.com: SunFounder 2 Channel DC 5V Relay Module with Optocoupler Low Level Trigger Expansion Board Compatible with Arduino R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi : Electronics Amazon.com: SunFounder 2 Channel DC 5V Relay Module with Optocoupler Low Level Trigger Expansion Board Compatible with Arduino R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi : Electronics](https://m.media-amazon.com/images/I/71oYyAoyO3L._AC_UF894,1000_QL80_.jpg)
Amazon.com: SunFounder 2 Channel DC 5V Relay Module with Optocoupler Low Level Trigger Expansion Board Compatible with Arduino R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi : Electronics
![GitHub - lucasgiusti/node-arduino-relay: This is the source code for a simple example using Nodejs and Socket.io for activate relay from a Arduino GitHub - lucasgiusti/node-arduino-relay: This is the source code for a simple example using Nodejs and Socket.io for activate relay from a Arduino](https://raw.githubusercontent.com/lucasgiusti/nodearduinorele/master/arduino/schema.png)
GitHub - lucasgiusti/node-arduino-relay: This is the source code for a simple example using Nodejs and Socket.io for activate relay from a Arduino
![3.3V 5V 12V 24V 1 Channel Relay Module support High and Low Level with Optocoupler Relay Output 1 way Relay Module for Arduino|Integrated Circuits| - AliExpress 3.3V 5V 12V 24V 1 Channel Relay Module support High and Low Level with Optocoupler Relay Output 1 way Relay Module for Arduino|Integrated Circuits| - AliExpress](https://ae01.alicdn.com/kf/H8738d73dd2444ec5925e0dc2e9c24cc2J/3-3V-5V-12V-24V-1-Channel-Relay-Module-support-High-and-Low-Level-with-Optocoupler.jpg_Q90.jpg_.webp)
3.3V 5V 12V 24V 1 Channel Relay Module support High and Low Level with Optocoupler Relay Output 1 way Relay Module for Arduino|Integrated Circuits| - AliExpress
![How to use a popular 1 channel webstore relay on 3V3 / Re-inverting an inverting relay – Arduino, ESP8266, ESP32 & Raspberry Pi stuff How to use a popular 1 channel webstore relay on 3V3 / Re-inverting an inverting relay – Arduino, ESP8266, ESP32 & Raspberry Pi stuff](https://arduinodiy.files.wordpress.com/2018/07/relay1.png?w=840)