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Amazon.com: 1 Channel Relay Module With Optocoupler 5V Low Level Trigger Relay Expansion Board For Arduino UNO R3 DSP ARM PIC AVR STM32 Raspberry Pi : Electronics
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DC 5V DPDT Relay Module Polarity Reversal Switch Board for Arduino UNO (2, DC 5V with 2.54mm pin): Amazon.com: Tools & Home Improvement
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Tolako 5v Relay Module 5V Indicator Light LED 1 Channel Relay Module for Arduino ARM PIC AVR MCU : Tools & Home Improvement - Amazon.com
1 Channel Relay Module Interface Board Shield for Arduino 5V Low Level Trigger One PIC AVR DSP ARM MCU DC AC 220V: Amazon.com: Industrial & Scientific
