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.

../../_images/case_33_01.png

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.

../../_images/case_33_03.png

Assembly Video#

Link: https://youtu.be/I05r5ebvQXY

Assembly Steps#

../../_images/case_step_33_01.png

../../_images/case_step_33_02.png

../../_images/case_step_33_03.png

../../_images/case_step_33_04.png

../../_images/case_step_33_05.png

../../_images/case_step_33_06.png

../../_images/case_step_33_07.png

../../_images/case_step_33_08.png

34.3. MakeCode Programming#


Step 1#

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

../../_images/case_01_10.png

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.

../../_images/case_03_09.png

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:#

../../_images/case_33_10.png

Reference#

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

You may also download it directly below:

Result#

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

../../_images/case-gif-33.gif