Maqueen Plus V3 - Matrix Laser Navigation STEM Robot for micro:bit

Designed for classroom robotics, this micro:bit-powered platform helps primary and secondary students move from introductory coding through to autonomous navigation and competition-style challenges. It uses a BBC micro:bit as the controller; the micro:bit and batteries are not included.

The robot combines an 8×8 matrix laser ranging sensor, high-precision motor encoders with PID control, and built-in line-tracking algorithms. It can detect obstacles, recognise intersections and plan routes more intelligently than a typical ultrasonic-sensor robot.

Fourteen GPIO expansion ports are available for adding extra sensors and modules, while screw-fixed detachable motors help keep classroom downtime low. The kit includes the Maqueen Plus V3 baseboard, pre-installed encoder motors, a battery board matching the selected version, matrix laser ranging sensor, sensor cable, wheels, line-tracking map, screwdriver, metal frame, metal mounting bracket, copper standoffs, M3 mounting screws and M3 thumb screws.

Features:

• Matrix Laser Ranging: 8×8 (64-point) laser sensor with 20–4000 mm range, up to 60 Hz update rate, and ±11 mm accuracy at close range
• Built-In Line Tracking: 5 line-tracking sensors with dedicated calibration button and 5 adjustable speed levels
• Intersection Recognition: Identifies 4 junction types (crossroad, T-shaped, right+straight, left+straight) in real time
• PID Motor Control: 2× N20 metal motors with magnetic encoders for precise distance and angle control
• Detachable Motors: Screw-fixed, easily replaceable motors to minimise downtime in classroom use
• Regulated Motor Power: Dedicated voltage-stabilising chip maintains consistent speed regardless of battery level
• RGB Lighting: 4× WS2812 ambient LEDs and 2× programmable RGB headlights
• 14 GPIO Expansion Ports: Extend functionality with additional sensors and modules
• Firmware Upgradeable: Dedicated interface and button for future updates
• Class 1 Laser Safety: Eye-safe laser ranging sensor

Specifications:

• Power Supply: 3.5–6V (4× AA batteries: 1.5V dry cells or 1.2V NiMH rechargeable)
• Battery Protection: Reverse connection protection
• Laser Sensor Range: 20–4000 mm
• Laser Accuracy (20–200 mm): ±11 mm (white), ±12 mm (grey)
• Laser Accuracy (200–4000 mm): ±5% (white), ±6% (grey)
• Detection Angle: 60° H × 60° V (90° diagonal)
• Laser Update Rate: 15–60 Hz
• Light Sensors: 2× (0–1023 range)
• Infrared Receiver: 1×
• Buzzer: 1×
• Bracket Adjustment: 1-axis, 270° range (M3 thumb screws)

It is suited to STEM robotics education, robotics competitions, BBC micro:bit programming lessons, autonomous navigation and obstacle-avoidance projects.