Using a multi-channel relay module with Arduino • AranaCorp

12V 1 Channel Relay Module with Optocoupler for Arduino – Aideepen

Guide for Relay Module with Arduino

LCTech 16ch relay board with 8266-12F and 2 x 74HC595 - Everything

Arduino DC 5V / 12V / 3V / 3.3V 1 2 4 8 Ways Channel Opto isolator

In-Depth: Interface One Channel Relay Module with Arduino

PCA9685 16-Channel Servo Controller Module - Einstronic Enterprise

Relay Module - 2-Channel 5V with optocoupler for Arduino PIC ARM

In-Depth: Interface One Channel Relay Module with Arduino

5V 2 Channel Relay Module With Optocoupler Relay Output 2 Way