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Amazon.com: SainSmart 8-Channel Relay Module : Automotive
SainSmart 4-Channel Relay Module
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JBtek 4 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM
SainSmart 4-Channel Relay Module
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Amazon.com: HiLetgo 5V 4 Channel Relay Shield for UNO R3 Relay Shield Four Channel Relay Shield for UNO R3 : Automotive
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AC100V-250V 30A 4 Channel Relay Module High Power DC5V High Low Level Trigger Switch Module: Amazon.com: Tools & Home Improvement
Excelity 4 Channel DC 5V Relay Module for DSP AVR PIC ARM DIY Development Controller - - Amazon.com
NOYITO 4 Channel Relay Module High Low Level Trigger with Optocoupler Isolation Load DC 30V AC 250V 10A for PLC Automation Equipment Control (4-Channel 12V): Amazon.com: Industrial & Scientific
SainSmart 4-Channel Relay Module
HiLetgo 12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger
Amazon.com: DC 12V RS485 4 Channel Relay Module with Optocoupler Protection, STM8S103F3 Relay Board Microcontroller Communication : Industrial & Scientific
Amazon.com: HiLetgo 12V 1 Channel Relay Module With Optocoupler Isolation Support High or Low Level Trigger : Industrial & Scientific
3.3V 4 Channel Relay Module High and Low Level Trigger Dual Optocoupler Isolation 3.3V Relay Module: Amazon.com: Industrial & Scientific
