4 Channel 5V Relay Shield Module For Arduino Mega 2560 R3 Compatible - Four Channel Relay Control Board Expansion 9084446488135

4 Channel 5V Relay Shield Module For Arduino Mega 2560 R3 Compatible - Four Channel Relay Control Board Expansion 9084446488135

- 5V active-low operation. - 4-channel relay interface board designed for direct control by a wide range of microcontrollers including Arduino, AVR,

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