STOP:bit - Traffic Light for BBC micro:bit

The Kitronik STOP:bit is a pre-assembled traffic light board designed for the BBC micro:bit. It replicates a real traffic light with three 10 mm LEDs (red, amber, green) driven directly from the micro:bit's I/O pins (P0, P1, P2), making it ideal for pedestrian crossing and traffic management coding projects.

Attach the micro:bit directly to the STOP:bit using the included screws, or connect with crocodile clips. Custom MakeCode blocks are available — search "Kitronik" in the MakeCode Editor's "Add Package" menu and select "kitronik-stopbit". Multiple STOP:bits can communicate via the micro:bit's radio module for multi-intersection traffic management scenarios.

Key Features

• Pre-Assembled – No soldering required, ready to use out of the box
• 3× 10 mm LEDs – Red, amber, and green in a realistic traffic light layout
• Direct micro:bit Connection – Bolt-on or clip-on attachment
• Custom MakeCode Blocks – Simplified coding for younger students
• Radio Communication – Coordinate multiple traffic lights using micro:bit radio
• MicroPython Support – Demo code available for advanced users

Specifications

• LED Size – 10 mm diameter
• I/O Pins Used – P0, P1, P2
• Dimensions – 120 × 38 × 15.6 mm
• PCB Thickness – 1.6 mm

Requires

• BBC micro:bit (sold separately)
• USB-A to Micro-B cable
• MakeCode Editor or MicroPython environment

Ideal For

• Traffic light and pedestrian crossing coding projects
• STEM classroom activities
• Multi-intersection traffic management simulations

Package Contents

• 1× STOP:bit traffic light board (pre-assembled)
• 5× M3 8 mm countersunk screws
• 5× M3 hex nuts

Resources

• MakeCode Tutorials (Kitronik)