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Amazon.com: Lystin 8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi : Electronics
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Amazon.com: 8-Channel DC 8-36V Relay Module,Time Delay Relay Module with Optocoupler,Relay Module Board for Power Control Applications. : Automotive
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