# Case 08: Balls Recognition

## Purpose

Recognize the balls with the AI lens. 

![](./images/05035_01.png)

## Products Link

[ELECFREAKS Smart AI Lens Kit](https://shop.elecfreaks.com/products/elecfreaks-smart-ai-lens-kit?_pos=1&_sid=d572dc26c&_ss=r)

[ELECFREAKS Nezha Breakout Board](https://shop.elecfreaks.com/products/elecfreaks-nezha-breakout-board?_pos=1&_sid=327dd9f18&_ss=r)


### Materials Required and Connection Diagram


 Connect the AI Lens to the IIC port on the Nezha expansion board as the picture shows. 

![](./images/05035_01_03.png)



## MakeCode Programming 


### Step 1

Click "Advanced" in the MakeCode drawer to see more choices.

![](./images/05001_04.png)

We need to add a package for programming. Click "Extensions" in the bottom of the drawer and search with "PlanetX" in the dialogue box to download it. 

![](./images/05001_05.png)

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

### Step 2

### Code as below:

![](./images/05035-08-06.png)



### Link
Link：[https://makecode.microbit.org/_2bxYTEbFU1H8](https://makecode.microbit.org/_2bxYTEbFU1H8)

You may also download it directly below:

<div style="position:relative;height:0;padding-bottom:70%;overflow:hidden;"><iframe style="position:absolute;top:0;left:0;width:100%;height:100%;" src="https://makecode.microbit.org/#pub:_2bxYTEbFU1H8" frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin"></iframe></div>  


### Result
 A smile face displays on the micro:bit if the the blue ball is recognized by the AI lens and a sad face displays on the micro:bit if it recognizes a red ball.