The Relay Shield provides four high-quality relays that can control high current loads to Arduino / Seeeduino boards. It also provides a NO (Normally Open) / NC (Normally Closed) interface. It could be a nice solution for controlling devices that could not be directly controlled by Arduino's Digital I/Os. The standardized shield form factor enables a smooth connection with Arduino and compatibles. The shield also has four LED indicators to show the on/off state of each relay.
Relays are useful in switching on/off AC appliances like fans, lights, motors, or high-current DC actuators like solenoid valves, etc.
Highlighted Features
- Arduino Uno/Leonardo/Seeeduino compatible; Other board or microcontroller via jumper cables
- Interface via digital I/O pins 4,5,6, and 7
- Relay screw terminals
- Standardized shield shape and design
- LED working status indicators for each relay
- High-quality relays
- COM, NO (Normally Open), and NC (Normally Closed) relay pins for each relay
- Update pin SCL, SDA, IOREF, NC.
Hardware Overview
Figure: Device Schematics