Amazon.com: 4 pcs DC 5V 1 Channel Relay Module Board Shield High/Low Level Trigger with Optocoupler : Industrial & Scientific
ANMBEST Relay Module with Optocoupler High/Low Level Trigger for Arduino (3, 3V Relay 1 Channel): Amazon.com: Industrial & Scientific
Amazon.com: JBtek 4 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM : Electronics
4 Relay Module 5V opto-isolated
24V 4 Channel Level Trigger Optocoupler Relay Module Geekcreit for Arduino - products that work with official Arduino boards
8 channel relay module optically isolated breakout shield for Arduino 5V 918363247225 | eBay
Amazon.com: YWBL-WH 30A 4 Channel Relay Module Expansion Board with Optocoupler for Arduino Raspberry Pi DSP AVR PIC ARM (5VDC) : Electronics
Amazon.com: ELEGOO 4 Channel DC 5V Relay Module with Optocoupler Compatible with Arduino UNO R3 MEGA 2560 DSP ARM PIC AVR STM32 Raspberry Pi : Electronics
Arduino 4 Relays Shield — Arduino Online Shop
Amazon.com: SainSmart 2-Channel Relay Module : Automotive
Amazon.com: ELEGOO 4 Channel DC 5V Relay Module with Optocoupler Compatible with Arduino UNO R3 MEGA 2560 DSP ARM PIC AVR STM32 Raspberry Pi : Electronics
Amazon.com: SainSmart 4-Channel Relay Module : Automotive
1 2 4 Channel 5v12v24v Relay Module Shield With Optocoupler High Low Level Trigger For Arduino Expansion Board Development Board - Integrated Circuits - AliExpress
SainSmart 5V 2A 4 Channel Solid State Relay Module High Level Trigger Black for Arduino Uno Duemilanove MEGA2560 MEGA1280 ARM DSP PIC: Amazon.com: Industrial & Scientific
4 Channel Relay Module 5V/12V/24V, Optocoupler Relay Module Board Trigger Up and Down for Arduino(12V) : Amazon.com.be: Electronics
JBtek 4 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM : Electronics - Amazon.com
Amazon.com: AITRIP 4 Channel 5V Solid State Relay Module Board High Level Trigger Compatible with Uno Duemilanove MEGA2560 MEGA1280 ARM DSP PIC : Industrial & Scientific
Amazon.com: HiLetgo 5V 4 Channel Relay Shield for UNO R3 Relay Shield Four Channel Relay Shield for UNO R3 : Automotive
Amazon.com: SainSmart 16-Channel 12V Relay Module Board for Arduino DSP AVR PIC ARM : Electronics
5v 12v 1 2 4 6 8 Channel Relay Module With Optocoupler Relay Output 1 2 4 6 8 Way Relay Module For Arduino In Stock - Relays - AliExpress
Amazon.com: CANADUINO 4 Relay Module 10A / 250V Opto-Isolated Inputs 3-24V for Arduino etc. : Electronics
SainSmart USB 4 Channel DC 12V Relay Module Automation for Arduino Raspberry Pi DSP AVR PIC ARM: Usb Relay Board: Amazon.com: Industrial & Scientific
Amazon.com: JBtek 4 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM : Electronics
