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ELEGOO 8 Channel DC 5V Relay Module with Optocoupler for Arduino UNO R3 MEGA R3 Project 1280 DSP ARM PIC AVR STM32 Raspberry Pi: Amazon.co.uk: Computers & Accessories
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8 Channel Relay Module
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8 Channel 12V Relay Board with Optocoupler at rajguruelectronics.com
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8 Channel 5V Relay Module - Wiki
