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Amazon.com: Oiyagai 4 Channel Relay Module DC 5V with Optocoupler H/L Level Triger for Arduino : Electronics
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New 5V 10A USB 8 Channel Relay Upper Computer ICSE014A 8-Channel Relay Module: Amazon.com: Industrial & Scientific
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Amazon.com: Oiyagai 4 Channel Relay Module DC 5V with Optocoupler H/L Level Triger for Arduino : Electronics
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YWBL-WH Relay Module One Way 30A Optocoupler Isolation Relay Module High Power Relay High/Low Level Trigger YYG-2(5VDC) (1): Amazon.com: Industrial & Scientific
Optocoupler Relay Module, Humanized Interface Design 4 Channel Relay Module, for Ac 250V/10A, Dc 30V/10A 5Ma Trigger Current 5V, 12V, 24V 73 * 50 * 18.5Mm (5V): Amazon.com: Industrial & Scientific
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: SunFounder 5V 8 Channel Relay Shield Module for Arduino R3 2560 1280 ARM PIC AVR STM32 Raspberry Pi 3, 2 Model B & B+ : Electronics
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Amazon.com: WMYCONGCONG 4 PCS XH-M131 Photoresistor Relay Module DC 12V Light Control Switch Photoresistor Relay Module Detection Sensor Automatic Light Control Switch with Cable : Industrial & Scientific
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Amazon.com: Relay Module 4 Ways 5V/10A/250VAC 10A/30VDC Relays Support USB Power Supply LED Indicator Transition Protection 8 Bit Microcontroller Chip Relay Switch : Industrial & Scientific
Amazon.com: Electronics-Salon 4 DPDT Signal Relay Module Board, DC 12V Version, for Arduino Raspberry-Pi 8051 PIC. : Electronics