![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.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
![Amazon.com: Electronics-Salon 2 DPDT Signal Relay Module Board, DC 12V Version, for Arduino Raspberry-Pi 8051 PIC. : Electronics Amazon.com: Electronics-Salon 2 DPDT Signal Relay Module Board, DC 12V Version, for Arduino Raspberry-Pi 8051 PIC. : Electronics](https://m.media-amazon.com/images/I/71gC98PJ3eL.jpg)
Amazon.com: Electronics-Salon 2 DPDT Signal Relay Module Board, DC 12V Version, for Arduino Raspberry-Pi 8051 PIC. : Electronics
![5v Dual Relay Module Two -channel Relay Module 2-ch High Level Trigger For Arduino - Industrial Computer & Accessories - AliExpress 5v Dual Relay Module Two -channel Relay Module 2-ch High Level Trigger For Arduino - Industrial Computer & Accessories - AliExpress](https://ae01.alicdn.com/kf/S20f73a6e935645258ca22dfd2d936706e.jpg)