Obstacle-Avoiding Robot
An Arduino car reads distance with ultrasonic sound and steers itself away from walls.
Start building ↓The build
Build the chassis
Mount motors, wheels and the Arduino on the frame.
Wire the driver
Connect motors to the L298N and control pins to the Arduino.
Mount the sensor
Fix the ultrasonic sensor facing forward.
Flash & roll
Upload code: drive forward, and turn when something is too close.
The robot runs a sense–decide–act loop: it pings distance, and when an obstacle is within a set range it stops and turns toward open space.
A closer look
The HC-SR04 times an echo to measure distance (distance = speed of sound × time ÷ 2); the code closes a simple feedback loop.
Variables to test
- 1 Lower the turn threshold — braver or crashier?
- 2 Add a second sensor — smoother navigation?
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