3.3V 5V 12V 1 2 4 8 Ways Channels Opto isolator Isolated Optocoupler Trigger Switch Relay Module AC 240V DC 30V Arduino
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3.3V 5V 12V 1 2 4 8 Ways Channels Opto isolator Isolated Optocoupler Trigger Switch Relay Module AC 240V DC 30V Arduino
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