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Datasheet
Relay Shield v3.0 Eagle File
4-Channel High Current Relay Expansion Shield For Arduino And Seeeduino Automation Projects
The Seeed Studio Relay Shield v3.0 is a reliable 4-channel relay expansion board designed for Arduino, Seeeduino, and compatible microcontroller platforms. It enables safe switching of high-current AC and DC loads that cannot be directly controlled through standard digital I/O pins. Featuring high-quality relays with Normally Open and Normally Closed interfaces, this shield is suitable for home automation, industrial control, robotics, and electrical switching applications.
Built with a standardized Arduino shield form factor, the Relay Shield v3.0 offers simple plug-and-play integration with Arduino Uno, Leonardo, Seeeduino, and other compatible boards. Dedicated LED status indicators for each relay provide clear visual feedback during operation, while screw-terminal connectors simplify wiring for external devices. This relay control shield is well-suited for switching fans, lights, motors, solenoid valves, and other high-power electrical devices in embedded-system and automation projects.
Key Features
- 4-Channel Relay Control: Supports simultaneous control of up to 4 high-current AC or DC devices.
- Arduino Compatible: Designed for Arduino Uno, Leonardo, Seeeduino, and compatible development boards.
- Digital I/O Interface: Operates via digital pins 4, 5, 6, and 7 for simplified integration.
- NO and NC Relay Outputs: Provides Normally Open and Normally Closed relay contacts for flexible switching configurations.
- High-Quality Relays: Durable relay components suitable for automation and industrial applications.
- LED Status Indicators: Dedicated LEDs display ON and OFF status for each relay channel.
- Relay Screw Terminals: Easy external wiring connection for appliances and actuators.
- Standard Shield Design: Stackable Arduino shield form factor for compact embedded-system development.
- Expanded Pin Compatibility: Updated pin layout with SCL, SDA, IOREF, and NC support.
Applications
- Home automation systems
- Smart lighting control
- Motor switching applications
- Solenoid valve control
- Industrial automation projects
- Electrical appliance control
- Robotics and mechatronics
- Arduino relay switching projects
- Embedded-system prototyping
- High-current load management
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