5V 1/2/4/8/16 Channel Relay Board Module Optocoupler LED for Arduino PiC ARM AVR

1/2/4/6/8 Channel 5V Relay Module Board Optocoupler LED for Arduino PiC ARM AVR. 1 CH Without Optocoupler(Black). 1 CH Without Optocoupler(Blue). For Arduino. The use of the industry's top quality optocoupler isolation, strong anti-interference ability, stable performance; the trigger current is only 3mA.

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