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4 Channel Relay Module Board with Optocoupler High & Low Trigger Module 5V/12V/24V Optional(5V): Amazon.com: Industrial & Scientific
Lysignal 6 Channel DC 5V Relay Module Relay Expansion Board with Optocoupler Insulation for Arduino : Amazon.ca: 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
Electronics-Salon 2 SPDT 10Amp Power Relay Module, DC 5V Version.: Amazon.com: Industrial & Scientific
Amazon.com: Tolako 5v Relay Module 5V Indicator Light LED 1 Channel Relay Module for Arduino ARM PIC AVR MCU : Tools & Home Improvement
Yizhet 5V 4 Channel Relay DC 5V Relay Shield Module Control Board with Optocoupler for Arduino PIC AVR MCU DSP ARM TTL Logic : Amazon.de: Computer & Accessories
Amazon.com: Onyehn 2pcs 8 Channel DC 5V Relay Module with Optocoupler for arduino UNO R3 MEGA 2560 1280 PIC AVR DSP ARM STM32 Raspberry Pi : Electronics
ANMBEST 5PCS 3V Relay Module with Optocoupler High Level Trigger Expansion Board for Raspberry Pi Arduino: Amazon.com: Industrial & Scientific
Amazon.com: AC100V-250V 30A High Power 2-Channel Relay DC5V High-Low Level Trigger Switch Module for Arduino : 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
Amazon.com: AITRIP 10PCS 5V One Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger Compatible with Arduino Raspberry pi ARM AVR : Industrial & Scientific
Amazon.com: Huayao 2pcs 4 Channel DC 5V Relay Module with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi : Electronics
Amazon.com: ARCELI 5PCS KY-019 5V One Channel Relay Module Board Shield for PIC AVR DSP ARM for Relay : 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