Micro:bit Color-recognized LEDs

1.Materials

micro:bit x 1

Nezha Expansion board x 1

Planet X series- Rainbow Led x 1

Planet X series- Color sensor x 1

RJ11 wire x 2

Bricks x N

2.Hardware Connestions

Connect the micro:bit to Nezha expansion board, then connect the color sensor and rainbow led to the IIC port and J1 connections accordingly as the picture shows.

3.Bricks build-up

Build a structure as the below:

4.Software Programming

Add Planet X extension into the package, click extension in the settings menu on the right upper side.

Search with Planet X in the dialogue box and add it to the package.

Now we go to the coding page:

Choose the show icon brick in the on start brick and set to connect the rainbow led to J1 with 8 leds.

Judge if the color detected is red, if yes, set the value of index from 0-8, and add by 1 to excute the commands. Then drag the brick of setting range to strip from 0 with the index leds; set the color of the range in red and pause for 100ms as the picture indicates.