Build an Autonomous Obstacle-Avoiding Robot Car Using MOTION:BIT

Are you ready to meet the newest member of our family? Say hello to MOTION:BIT! This awesome micro:bit expansion board lets you create all kinds of robots with different movements and functions using DC motors and servo motors. In today's video, we'll show you how to make a super cool obstacle-avoiding robot car using MOTION:BIT!  So, let's get started and have some fun!

Video Tutorial

Components Required

• MOTION:BIT - Simplifying Motion Control with micro:bit
• 4 TT Motor with Wheel Kits
• 3V-5.5V Ultrasonic
• Qwiic Cable

Hardware Components

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TT Motor + Wheel Kit

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3V-5.5V SR04P Ultrasonic Ranging Module

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STEMMA QT / Qwiic JST SH 4-pin Cable with Premi...

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MOTION:BIT - Simplifying Motion Control with mi...

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MOTION:BIT with 18650 Li-Ion Battery

$33.23 $33.70 $33.23

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3V-5.5V SR04P Ultrasonic Ranging Module

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Connection

Code

Connect your micro:bit to your computer and open MakeCode editor to start programming.

• Add “MOTIONBIT” extension
• Add "Ultrasonic" extension
• then follow the code block in the picture above
• After completing the code, download it on microbit

You can also view and edit the code by clicking here!

Car chassis

The car chassis was 3D printed using Artillery Hornet. You can find the STL files Here

Project Complete

When you press Button A, the car will start moving. An ultrasonic sensor is constantly monitoring the area in front of the car. If the sensor detects an obstacle less than 15cm away, the car will immediately stop and steer away from the obstacle to avoid collision.

If you press Button B, the car will come to a complete stop and the RGB LEDs will turn off, ensuring that the car is no longer in motion and conserving battery power.