36. Case 32: Gesture Recognition Ring LEDs#

36.1. Introduction#

This is an interesting lighting device that uses gesture recognition sensors to recognize human gesture commands and control the color of the light.

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36.2. Quick Start#

Materials Required#

Nezha expansion board × 1

micro:bit V2 × 1

Gesture 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#

Inset the micro:bit, connect the gesture sensor to IIC port and the rainbow led ring to S1 on Nezha expansion board.

../../_images/case_32_03.png

Assembly Video#

Video link: https://youtu.be/hq1rtbGvAwU

Assembly Steps#

../../_images/case_step_32_01.png

../../_images/case_step_32_02.png

../../_images/case_step_32_03.png

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36.3. MakeCode Programming#

Step 1#

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

../../_images/case_01_10.png

We need to add a package for programming. Click “Extensions” in the bottom of the drawer and search with “nezha” to download it.

../../_images/case_03_09.png

Note: If you met a tip indicating the codebase might be deleted due to incompatibility, you may continue as the tips say or create a new project in the menu.

Step 2#

Programme as the pictures indicate#

../../_images/case_32_10.png

Reference#

Link: https://makecode.microbit.org/_f3sDCoEzXfa8

You may download it directly below:

Result#

The lights color is able to be changed by hands gesture.

../../_images/case-gif-32.gif