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3 PCS 5V Relay Module with Optocoupler High or Low Level Trigger Expansion Board for Raspberry Pi Arduino STM32, 1 Channel
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5V 8 Channel Relay Module 8 Channel 5V Relay Module with Optocoupler for Arduino Raspberry Pi DSP AVR PIC ARM – REES52
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5v Relay Module 1 Channel Relay Board for Raspberry Pi with Opto-Isolated High or Low Level Trigger 5v 1 Channel Relay Switch for Arduino: Amazon.com: Industrial & Scientific
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