# Grove Circular LED

![](https://github.com/SeeedDocument/Grove-Circular_LED/raw/master/img/Circular_LED.jpg) This is a unique ring– it has a florid body with 24 controllable LEDs. Maybe it will drive the inspiration out of you to make a glowing magic ring! There is a 1\*1 square hollow-out in the middle of this module, where you can place a Grove Encoder in and make it a rotary visual encoder!

## Features

* Circular shape
* 24 LEDs, about 5.5 mA drive current for each channel.
* Controllable LEDs with florid effects
* Grove Interface.

## Schematic

![](https://github.com/SeeedDocument/Grove-Circular_LED/raw/master/img/Circular_LED_schmatic.jpg)

## Specification

| Item       | Min                    | Typical          | Max | Unit |
| ---------- | ---------------------- | ---------------- | --- | ---- |
| Voltage    | 4.5                    | 5                | 5.5 | VDC  |
| Current    | /                      | 5.5 for each LED |     | mA   |
| Dimension  | Ring Form:4.5 diameter | mm               |     |      |
| Net Weight | 12                     | g                |     |      |

## Interface

![](https://github.com/SeeedDocument/Grove-Circular_LED/raw/master/img/Circular_LED_Interface.jpg)

## Usage

### Hardware

With the definition "CircularLED circularLED1(10,9);" in the demo, please connect this module to the D9 Grove Connector of [Grove base shield](https://app.gitbook.com/Base_shield_v2) with the 4- pin Grove cable. You can also connect the "Yellow" signal to D9 and "White" to D10 with jumper wires.

### Software

Please download the CircularLED lib and test this module with*CircularLEDtest* example. You can click [here](https://app.gitbook.com/Upload_Code) to learn how to upgrade the sketches.

![](https://github.com/SeeedDocument/Grove-Circular_LED/raw/master/img/Circular_LED_shining.gif)

Please also refer to the [Grove-Encoder](https://app.gitbook.com/Grove-Encoder) to learn more about this module.

## Source

* [CircularLED Library](https://github.com/SeeedDocument/Grove-Circular_LED/raw/master/res/CircularLED.zip)
* [Grove Circular LED schematics PDF File](https://github.com/SeeedDocument/Grove-Circular_LED/raw/master/res/Circular_LED_v0.9b.pdf)
* [Grove-circular LED eagle files](https://github.com/SeeedDocument/Grove-Circular_LED/raw/master/res/Grove-circular_LED_eagle_files.zip)