37. Case 33: Color-controlled Lights#

37.1. Introduction#

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


37.2. Quick Start#

Materials Required#

Nezha expansion board × 1

micro:bit V2 × 1

Color sensor × 1

Rainbow LED ring × 1

Bricks × n

Tips: You may need to purchase Nezha Inventor’s Kit and Purchase Interactive coding accessories pack here. if you want all the above components.

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#









37.3. 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.