# Rainbow LED module

## Introduction

- [Ring:bit car V2 light-bar module](https://www.elecfreaks.com/ring-bit-car-accessories-sonar-bit-tracking-module-and-led-light-bar.html) is the dedicated module designed for [Ring:Bit Car V2](https://shop.elecfreaks.com/products/elecfreaks-micro-bit-ring-bit-v2-car-kit-without-micro-bit-board?_pos=4&_sid=66ba68dec&_ss=r). It brings you mutiple color with simple assemblling methods.
- It comes with 8 Rainbow full color LEDs. You can update it to a car with auto-headlights and rainbow lights.

![](https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/ring_bit_v2/images/ring_bit_v2_Rainbow_01.jpg)![](https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/ring_bit_v2/images/ring_bit_v2_Rainbow_02.jpg)

## Features

- Input voltage 3V~5V，driving directly by micro:bit.

- Standard 3 line GVS port, occupying only one I/O port.

- 8 small LEDs, power saving and energy saving.

- Each led can be programmed seperately with RGB color.

## Parameter


 Items | Parameter | Remark 
 :-: | :-: |:-:
 Name |Ring:bit car v2 light bar|-
 SKU|EF03425|-
 Working Voltage |DC 3-5V|-
 Connection Port |Ring:bit car dedicated pin ports|Fixed with scews
 Output Signal |Simulation|-
 LEDs |8 pcs|-
 Dimension |60.8 x 33.20mm|-
 Net Weight |5.7g|-


## Dimensions:


 ![](https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/ring_bit_v2/images/ring_bit_v2_Rainbow_03.png)

## Quick to Start


### Hardware Connection 

First, insert this module to the baseboard of the Ring:bit car V2.  

![](https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/ring_bit_v2/images/ring_bit_v2_Rainbow_04.gif)

Then, screw up the screws.

![](https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/ring_bit_v2/images/ring_bit_v2_Rainbow_05.gif)![](https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/ring_bit_v2/images/ring_bit_v2_Rainbow_06.gif)

Completed.

![](https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/ring_bit_v2/images/ring_bit_v2_Rainbow_07.jpg)

### Software Programming


- Program a simple light-bar code in the [makecode](https://makecode.microbit.org/) .

- Set the variable for Strip, initiate the 10pcs LEDs connected to P0.
- Programme the LED to show Rainbow color
- Programme to circulate and displace the color in "forever" brick.
- Show color.

![](https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/ring_bit_v2/images/ring_bit_v2_Rainbow_08.png)

 Links: [https://makecode.microbit.org/_3Wc1k8Ckg9vF](https://makecode.microbit.org/_3Wc1k8Ckg9vF)

You can 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:_3Wc1k8Ckg9vF" frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin"></iframe></div>

### Result

Rainbow lights.

## FAQ