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DIY robot concept

How to make a maze-solving robot

Parts cost
USD 138.00

A micromouse-style learning build with wall sensors, encoder odometry, cell mapping, turn calibration and a safe speed ramp.

Parts

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A maze-solving robot is a step beyond line following because the robot must sense walls, estimate position and remember decisions.

A maze-solving robot is a step beyond line following because the robot must sense walls, estimate position and remember decisions. The first goal is not speed; it is repeatable turns and a map that matches the maze.

Build a small test maze, log sensor readings and calibrate one cell at a time.

Build a small test maze, log sensor readings and calibrate one cell at a time. After it can explore slowly, add flood-fill or another path planner and only then increase speed.

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Design variants

Wall follower

Start with left-hand or right-hand rules before mapping.

Flood-fill solver

Explore cells, score distances and run the shortest path.

Speed run version

Add acceleration profiles after turns are repeatable.

FAQ

Can I use ultrasonic sensors?

For a slow large maze, yes. Small mazes are easier with ToF sensors.

What algorithm should I start with?

Wall following is easiest. Flood-fill is a good next step for micromouse style mazes.

Why does the map drift?

Wheel slip, bad turn calibration and inconsistent wall thresholds are common causes.

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