The BDD 4 Channel Relay Shield is an Arduino-compatible expansion board designed to provide a simple and reliable method of controlling high-voltage and high-current devices from an Arduino UNO or compatible development board. Featuring four onboard 5V relays, the shield plugs directly onto the Arduino, eliminating the need for complex wiring and making it ideal for home automation, robotics, industrial control, and educational projects.
The shield follows the standard Arduino shield form factor, allowing additional compatible shields to be stacked on top for expanded functionality. Each relay includes a red status LED that illuminates when activated, providing instant visual feedback of the relay state.
Each relay provides Normally Open (NO), Normally Closed (NC), and Common (COM) terminals, allowing flexible switching of AC or DC loads. Three M3 mounting holes are also included for secure installation in enclosures or control panels.
Warning: This relay shield is capable of switching mains voltages. Installation and wiring should only be performed by qualified personnel following appropriate electrical safety procedures.
Features
- Part Number: BDD 4 CHANNEL RELAY SHIELD
- Compatible with Arduino UNO
- Standard Arduino shield format
- Four independent 5V relay outputs
- Direct plug-in design
- Stackable with other Arduino shields
- Individual red LED indicator for each relay
- Normally Open (NO), Normally Closed (NC), and Common (COM) contacts
- Suitable for 5V and 3.3V control logic
- Three M3 mounting holes for secure installation
- Ideal for automation and control applications
Specifications
- Product Type: Arduino Relay Shield
- Compatible Boards: Arduino UNO and compatible boards
- Relay Channels: 4
- Relay Voltage: 5V DC
- Relay Model: HJR-4102-L-5V (or equivalent)
- Control Logic: 3.3V / 5V compatible
- Relay Contacts: NO / NC / COM
- Power Input: 5V DC
- Status Indicators: 4 × Red LEDs
- Mounting: Standard Arduino Shield with 3 × M3 mounting holes
Applications
- Home automation
- Smart home systems
- Lighting control
- Appliance switching
- Industrial automation
- Motor and pump control
- Security systems
- Arduino projects
- Robotics
- Educational electronics
What's in the box
1 x BDD 4 Channel Relay Shield for Arduino UNO 5V Relay Expansion Board
