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Amazon.com: DIYmall 5V Relay Module 1 Channel Relay Switch Microcontroller Relay Board Shield for Arduino ARM PIC AVR MCU (Pack of 3pcs) : Electronics
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Tanbupu Relay Module 12VDC 2 Channel Relay Switch Board with OPTO-Isolated High Or Low Level Trigger Board for Arduino X-002-2-12VDC: Amazon.com: Industrial & Scientific
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