The Relay Bit allows your BBC micro:bit to control low and medium current/voltage devices. It’s a handy option for controlling devices that could not be directly controlled by micro:bit’s Digital I/Os.

The standardised shield form factor enables a smooth connection with the micro:bit.

The board includes 4 relays for controlling up to 4 different devices, and includes helpful features such as LED indicators and a 90-degree micro:bit connector.

Note: micro:bit board not included.

Features

• 4x High-quality 3V relays for loads up to 2A/24VDC or 2A/120VAC
• Control up to 4 devices
• 90-degree micro:bit connector
• LEDs for each relay status
• Standardised shield shape and design
• Make your home IoT enabled
• Mounting holes provided

Board Features

Specifications

• Channels: 3
• Voltage: 3V
• AC control voltage: 120V @ 2A
• DC control voltage: 24V @ 2A
• Dimensions: 7×4.3×1.2cm (approx)
• Weight: 100g (approx)

Resources

• Product GitHub page
• Product video with instructions
• Pinout
  • Relay 1: P12
  • Relay 2: P13
  • Relay 3: P14
  • Relay 4: P15