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5V 2 Channel Relay Module with Optocoupler Isolation Compatible Arduino ESP32 Raspberry Pi PLC DIY Projects

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1-5PCS 4 Channel Relay Board AVR 51 PIC 5V 12V 4-Channel Relay Module with Optocoupler Relay 4 Way Relay Module for Arduino

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8 Channel 12V 24V Relay Shield Module RS485 PLC IO Expanding Board For Arduino NANO V3.0

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DC 5V 12V 24V 1/2/4/6/8 Channel Relay Module Board with Optocoupler Relay Output High- and Low-Level Trigger for Arduino

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