Original Arduino 4-Channel Relay Shield

The Original Arduino 4-Channel Relay Shield can be used to control projects that require high-power switching.

Each of the four relays on the board provides Common (C), Normally Open (NO), and Normally Closed (NC) pins, accessible via screw terminals for easy connections. Additionally, the board includes 2 TinkerKit inputs (white), 2 TinkerKit outputs (orange), and 2 TinkerKit TWI (I2C) connections, allowing you to easily connect your input/output and TWI modules to this shield.

The relays on the board are connected in order to Arduino digital output pins 4, 7, 8, and 12. The TinkerKit inputs (IN2 and IN3) are connected to Arduino analog pins A2 and A3. The TinkerKit outputs (OUT5 and OUT6) are connected to digital pins 5 and 6. The TinkerKit TWI connections are linked to the I2C (TWI) bus. Each relay on the board also has a status LED. The relays can switch loads up to 60W (maximum load voltage 48V).