30. Case 29: The Dazzling Car

30.1. Introduction

This is a simple car. I installed a cool rainbow light ring on the car, and we can display different lighting effects through this light ring.

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30.2. Quick Start

Materials Required

Nezha expansion board × 1

micro:bit V2 × 1

motors × 2

Color sensor × 1

Rainbow LED ring × 1

Bricks × n

Tips:Purchase Interactive coding accessories pack here.

Connection Diagram

Insert the micro:bit, connect the motors to M1and M4, the color sensor to IIC port and the rainbow LED ring to J1 on the Nezha expansion board as the picture shows.

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Assembly Video

Link: https://youtu.be/Am1ZEq1CqnY

Assembly Steps

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30.3. MakeCode Programming

Step 1

Click “Advanced” in the MakeCode to see more choices.

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For programming, we need to add a package, click “Extensions” at the bottom of the MakeCode drawer and search with “nezha” in the dialogue box to download it

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Notice: If you met a tip indicating that some codebases would be deleted due to incompatibility, you may continue as the tips say or create a new project in the menu.

Step 2

Code as below:

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Reference

Link: https://makecode.microbit.org/_JtKg7ffF1YK7

You may also download it directly below:

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Result

After powering on, press button A to drive the car foward and the LEDs light up in red and blue, press button B to stop the car and the LEDs light off.

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