# Case 28:The Wiper

## Purpose
---
Make a wiper.
 
![](./images/Wonder-Building-Kit-case-28-01.png)

## Link: 
---
[micro:bit Wonder Building Kit](https://shop.elecfreaks.com/products/elecfreaks-micro-bit-32-in-1-wonder-building-kit-without-micro-bit-board?_pos=5&_sid=2094afd2f&_ss=r)

## Materials Required
---
![](./images/Wonder-Building-Kit-step-case-28-01.png)

## Bricks build-up
---
![](./images/Wonder-Building-Kit-step-case-28-02.png)

![](./images/Wonder-Building-Kit-step-case-28-03.png)

![](./images/Wonder-Building-Kit-step-case-28-04.png)

![](./images/Wonder-Building-Kit-step-case-28-05.png)

![](./images/Wonder-Building-Kit-step-case-28-06.png)

![](./images/Wonder-Building-Kit-step-case-28-07.png)

![](./images/Wonder-Building-Kit-step-case-28-08.png)

![](./images/Wonder-Building-Kit-step-case-28-09.png)

![](./images/Wonder-Building-Kit-step-case-28-10.png)

![](./images/Wonder-Building-Kit-step-case-28-11.png)

![](./images/Wonder-Building-Kit-step-case-28-12.png)

![](./images/Wonder-Building-Kit-step-case-28-13.png)

![](./images/Wonder-Building-Kit-step-case-28-14.png)

![](./images/Wonder-Building-Kit-step-case-28-15.png)

![](./images/Wonder-Building-Kit-step-case-28-16.png)

![](./images/Wonder-Building-Kit-step-case-28-17.png)

![](./images/Wonder-Building-Kit-step-case-28-18.png)

## Hardware Connection

Connect a [motor](https://www.elecfreaks.com/geekservo-motor-2kg-compatible-with-lego.html) to M1 port on [Wukong breakout board](https://www.elecfreaks.com/wukong-board-with-lego-holder-for-micro-bit.html).

![](./images/Wonder-Building-Kit-case-28-06.png)

## Software Platform
---
[MakeCode](https://makecode.microbit.org/)

## Coding
---
### Add extensions
Click "Advanced" in the MakeCode to see more choices.
 
![](./images/Wonder-Building-Kit-case-21-02.png)

Search with Wukong in the dialogue box to download it. 

![](./images/Wonder-Building-Kit-case-21-03.png)





### Program
 
![](./images/Wonder-Building-Kit-case-28-04.png)

Link:[https://makecode.microbit.org/_5RT3t9DX6Lv0](https://makecode.microbit.org/_5RT3t9DX6Lv0)

### Result

When the micro:bit is powering on, it displays a heart icon. When button A is pressed, the wiper starts driving; when button A is pressed again, the wiper accelerates; and when button B is pressed, the wiper decelerates.