> For the complete documentation index, see [llms.txt](https://cavedu.gitbook.io/linkit-7697/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cavedu.gitbook.io/linkit-7697/linkit-7697-blocklyduino-shi-yong-zhi-nan/shi-zuo-fan-li-jiao-xue/b05.-grove-led-deng-tiao.md).

# B05. Grove LED 燈條

### 專案說明 <a href="#b05.groveled-deng-tiao-zhuan-an-shui-ming" id="b05.groveled-deng-tiao-zhuan-an-shui-ming"></a>

使用 **Grove擴充板** 連接 **LED 燈條** ([Grove -](http://wiki.seeed.cc/Grove-Relay/)[ LED Bar](http://wiki.seeed.cc/Grove-LED_Bar/))，控制燈條的亮度刻度從最低到最高，每秒進一格。&#x20;

{% hint style="info" %}
此**燈條**包含於 [**Grove Starter Kit for LinkIt 7697**](https://www.seeedstudio.com/Grove-Starter-Kit-for-LinkIt-7697-p-2834.html) 內。 使用此範例前請先閱讀 [**Grove 相關基礎知識**](https://docs.labs.mediatek.com/linkit-7697-blocklyduino/b00-grove-12880112.html)， 並依照其內的說明步驟[**安裝 Grove 相關驅動程式**](https://docs.labs.mediatek.com/linkit-7697-blocklyduino/b00-grove-12880112.html#B00.Grove%E7%9B%B8%E9%97%9C%E5%9F%BA%E7%A4%8E%E7%9F%A5%E8%AD%98-grove_driver)
{% endhint %}

![](/files/KVF8V4AoSX5F1PQdQdMn)

### 電路圖  <a href="#b05.groveled-deng-tiao-dian-lu-tu" id="b05.groveled-deng-tiao-dian-lu-tu"></a>

* [LinkIt 7697](https://robotkingdom.com.tw/product/linkit-7697/)
* [Grove breakout for LinkIt 7697](https://robotkingdom.com.tw/product/linkit-7697-2/)
* [Grove - ](https://www.seeedstudio.com/Grove-Ultrasonic-Ranger-p-960.html)[LED Bar v2.0](https://www.seeedstudio.com/Grove-LED-Bar-v2.0-p-2474.html)

{% hint style="info" %}
**LED 燈條**是**數位訊號輸出**， 可以接 **D2/D3/D4/D10/D12** 的 Grove 連接埠。 本範例連接到 **D2**
{% endhint %}

![](/files/I98WJqdXVPrGQwc3dLZ2)

### 積木畫布 <a href="#b05.groveled-deng-tiao-ji-mu-hua-bu" id="b05.groveled-deng-tiao-ji-mu-hua-bu"></a>

![](/files/Q8Ff9Au5wXA3PdEfyx8C)

產生出的 Arduino 程式如下

```
#include <Grove_LED_Bar.h>

int i;

Grove_LED_Bar __bar2(3, 2, 0);

void setup()
{
  __bar2.begin();
}

void loop()
{
  for (i = 0; i <= 10; i++) {
    __bar2.setLevel(i);
    delay(1000);
  }

  delay(1000);
}
```