Arduino Maze-Solving Robot

2WD robot chassis

Arduino Uno Rev3

Arduino Motor Shield Rev3

Arduino IDE

7.4 V 2S Lipo 15 C 800mAh Battery

IR proximity sensor

drill, screwdriver, soldering iron

<html><body><h3>Working Principle</h3>The maze-solving robot operates based on real-time feedback from its IR sensors. These sensors help the robot differentiate between a path and an obstacle. The <a href="https://circuitdigest.com/microcontroller-projects/arduino-maze-solving-robot#maze-solving-robot-algorithm">navigation algorithm </a>used here is the Left-Hand Rule (or Right-Hand Rule), a simple but effective method for solving connected mazes. <ol><li>The robot places its "hand" (IR sensor) on one side of the maze. </li><li>It follows the boundary, making turns whenever necessary to stay on track. </li><li>If a dead end is detected, the robot turns back and continues navigating until it finds an exit. </li></ol> This method is highly effective in mazes where a continuous wall exists and ensures that the robot never gets stuck indefinitely. While this approach does not always find the shortest path, it guarantees that the robot will reach the exit. For simplicity, this project uses black lines on a white surface instead of physical walls. This makes it easier to create and modify maze designs for testing. <h3>Circuit &amp; Assembly</h3>The <a href="https://circuitdigest.com/microcontroller-projects/arduino-maze-solving-robot#maze-solving-robot-circuit-diagram">Circuit Connection </a>is straightforward since the motor shield simplifies connections. The IR sensors are connected to A0, A1, and A2, while the motors are linked to M1 and M2 of the motor shield. The battery pack provides stable power for both the Arduino and the motors. <figure><img src="https://projects.arduinocontent.cc/e8f33e83-464c-4d4a-b873-f7a4dbe5e8bc.jpg"/><figcaption>Circuit Diagram</figcaption></figure> After assembling the robot, sensor placement is critical. If positioned incorrectly, the robot may not detect turns properly. Calibration may be required to fine-tune performance. For full details, including the circuit diagram, source code, and a working demonstration, check out the complete guide <a href="https://circuitdigest.com/microcontroller-projects/arduino-maze-solving-robot">here </a>. <h3>Working Demostration</h3> <figure><img src="https://projects.arduinocontent.cc/c31e28c0-63ae-405c-afd5-d264bf90fa8d.gif"/><figcaption></figcaption></figure> </body></html>

Arduino Maze-Solving Robot

Build a simple maze-solving robot using an Arduino UNO, three IR sensors, and an algorithm known as the "Hand-on-Wall Rule" for navigation. Unlike traditional wall-based mazes, this robot follows a line-based maze, making it easy to test with various patterns.