# Case 47：Wipers

## Introduction
Build a wiper with the [Nezha Inventor's Kit](https://shop.elecfreaks.com/products/elecfreaks-micro-bit-nezha-48-in-1-inventors-kit-without-micro-bit-board?_pos=2&_sid=ed1b6fbd2&_ss=r).

![](./images/47_1.png)


## Quick to Start

### Materials Required

[Nezha Inventor's Kit](https://shop.elecfreaks.com/products/elecfreaks-micro-bit-nezha-48-in-1-inventors-kit-without-micro-bit-board?_pos=2&_sid=ed1b6fbd2&_ss=r)

### Assembly

Components List

![](./images/neza-inventor-s-kit-case-47-02.png)


Build it as the assembly steps suggest: 

![](./images/neza-inventor-s-kit-step-47-01.png)

![](./images/neza-inventor-s-kit-step-47-02.png)

![](./images/neza-inventor-s-kit-step-47-03.png)

![](./images/neza-inventor-s-kit-step-47-04.png)

![](./images/neza-inventor-s-kit-step-47-05.png)

![](./images/neza-inventor-s-kit-step-47-06.png)

![](./images/neza-inventor-s-kit-step-47-07.png)

![](./images/neza-inventor-s-kit-step-47-08.png)

![](./images/neza-inventor-s-kit-step-47-09.png)

![](./images/neza-inventor-s-kit-step-47-10.png)

![](./images/neza-inventor-s-kit-step-47-11.png)

![](./images/neza-inventor-s-kit-step-47-12.png)

![](./images/neza-inventor-s-kit-step-47-13.png)

![](./images/neza-inventor-s-kit-step-47-14.png)

![](./images/neza-inventor-s-kit-step-47-15.png)

![](./images/neza-inventor-s-kit-step-47-16.png)

![](./images/neza-inventor-s-kit-step-47-17.png)

### Connection Diagram

Connect the [motors](https://shop.elecfreaks.com/products/elecfreaks-high-speed-building-blocks-motor?_pos=4&_sid=a2da3fff8&_ss=r) to M1 on [Nezha Breakout Board](https://shop.elecfreaks.com/products/elecfreaks-nezha-breakout-board?_pos=1&_sid=00432325a&_ss=rl).

![](./images/neza-inventor-s-kit-case-47-03.png)


## MakeCode Programming

### Step 1

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

![](./images/neza-inventor-s-kit-case-37-04.png)

For programming [Nezha Breakout Board](https://shop.elecfreaks.com/products/elecfreaks-nezha-breakout-board?_pos=1&_sid=00432325a&_ss=rl), we need to add a package. Search with "Nezha" in the dialogue box and click to download it. 

![](./images/neza-inventor-s-kit-case-37-06.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 the picture suggests

![](./images/neza-inventor-s-kit-case-47-07.png)

### Reference
Link: [https://makecode.microbit.org/_TgWEyTgdVL3z](https://makecode.microbit.org/_TgWEyTgdVL3z)

You may also download it directly: 

<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:_TgWEyTgdVL3z" frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin"></iframe></div>  


### Result

When the microbit is powered on, it displays a heart pattern. When button A is pressed, the wiper starts to driving. When button A is pressed again, the wiper accelerates the movement. When button B is pressed, the wiper slows down.

![](./images/47_2.gif)