> For the complete documentation index, see [llms.txt](https://cavedu.gitbook.io/cavedu/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/cavedu/rk002/module/002_led.md).

# LED模組

![](/files/-LwXV-lO7CcoPDQhRX-V)

## 專案說明

使用「科易KEYES Arduino UNO R3 開發板」連接「LED模組」, 每2秒鐘LED模組閃爍一次。

此**LED模組**包含於**「**[洞洞兩教學材料包 Education Kit 002](https://www.robotkingdom.com.tw/product/rk-education-kit-002/)**」**內。

## 電路圖

* [KEYES Arduino UNO R3](https://www.robotkingdom.com.tw/product/keyes-uno-r3/)
* 通用型彩色Sensor shield v5.0感測器擴充板
* LED模組

**LED模組**是**數位/類比訊號**輸出， 可以接「D0 \~ D13」的 KEYES Arduino UNO R3訊號端上。 本範例連接到「**D3」**

![](/files/-LwXV-lPX474bJ8tuuCP)

## Arduino 程式

將3號腳位的電位拉低、拉高，每2秒鐘會切換**LED**的亮暗一次。

產生出的 Arduino 程式如下

```c
void setup()
{
 pinMode(3, OUTPUT);
}
void loop()
{
 digitalWrite(3, HIGH);
 delay(1000);
 digitalWrite(3, LOW);
 delay(1000);
}
```


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