34. Case 33: Color-controlled Lights

34.1. Introduction

Recognize the color through the color recognition sensor, and control the rainbow LED to light up the in the same color.


34.2. Quick Start

Materials Required

Nezha expansion board × 1

micro:bit V2 × 1

Color sensor × 1

Rainbow LED ring × 1

Bricks × n

Tips:Purchase Interactive coding accessories pack here.

Connection Diagram

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


Assembly Video

Link: https://youtu.be/I05r5ebvQXY

Assembly Steps









34.3. MakeCode Programming

Step 1

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


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.


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:



Link: https://makecode.microbit.org/_CoKVCRc3wJJJ

You may also download it directly below:



After powering on, the the lights turn on with the color detected from the color sensor.