# Case 46：Rangefinder Guitar

## Introduction
Build a rangefinder guitar 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/neza-inventor-s-kit-case-46-01.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-46-02.png)

Build it as the assembly steps suggest: 

![](./images/neza-inventor-s-kit-step-46-01.png)

![](./images/neza-inventor-s-kit-step-46-02.png)

![](./images/neza-inventor-s-kit-step-46-03.png)

![](./images/neza-inventor-s-kit-step-46-04.png)

![](./images/neza-inventor-s-kit-step-46-05.png)

![](./images/neza-inventor-s-kit-step-46-06.png)

![](./images/neza-inventor-s-kit-step-46-07.png)

![](./images/neza-inventor-s-kit-step-46-08.png)

![](./images/neza-inventor-s-kit-step-46-09.png)

![](./images/neza-inventor-s-kit-step-46-10.png)

![](./images/neza-inventor-s-kit-step-46-11.png)

![](./images/neza-inventor-s-kit-step-46-12.png)

![](./images/neza-inventor-s-kit-step-46-13.png)

![](./images/neza-inventor-s-kit-step-46-14.png)

![](./images/neza-inventor-s-kit-step-46-15.png)

![](./images/neza-inventor-s-kit-step-46-16.png)

![](./images/neza-inventor-s-kit-step-46-17.png)

![](./images/neza-inventor-s-kit-step-46-18.png)

![](./images/neza-inventor-s-kit-step-46-19.png)

![](./images/neza-inventor-s-kit-step-46-20.png)

![](./images/neza-inventor-s-kit-step-46-21.png)

![](./images/neza-inventor-s-kit-step-46-22.png)

![](./images/neza-inventor-s-kit-step-46-23.png)

![](./images/neza-inventor-s-kit-step-46-24.png)

![](./images/neza-inventor-s-kit-step-46-25.png)

![](./images/neza-inventor-s-kit-step-46-26.png)

![](./images/neza-inventor-s-kit-step-46-27.png)

![](./images/neza-inventor-s-kit-step-46-28.png)

![](./images/neza-inventor-s-kit-step-46-29.png)

![](./images/neza-inventor-s-kit-step-46-30.png)



### Connection Diagram

Connect the [Ultrasonic sensor](https://shop.elecfreaks.com/products/elecfreaks-planetx-ultrasonic-sensor?_pos=1&_sid=9f90a6738&_ss=r) to J1 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-46-03.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 [Ultrasonic sensor](https://shop.elecfreaks.com/products/elecfreaks-planetx-ultrasonic-sensor?_pos=1&_sid=9f90a6738&_ss=r), we need to add a package. Search with ”PlanetX“, in the dialogue box and click to download it. 

![](./images/neza-inventor-s-kit-case-37-05.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-46-07.png)

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

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


### Result

By detecting the distance between the ultrasonic sensor and the baffle, the buzzer is controlled to emit different tones.

![](./images/46_2.gif)