点亮arduino uno r3板载 / 外接led灯

1、选择开发板

2、选择端口

3、代码：

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN （13） as an output.
  pinMode(LED_BUILTIN, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}

4、点击上传代码，上传后led开始闪烁。

点亮外接LED灯

int LED = 7;

void setup() {               
  // 定义7为输出引脚
  pinMode(LED, OUTPUT);     
}

void loop() {
  digitalWrite(LED, HIGH);   // 点亮LED
  delay(1000);               // 持续1秒
  digitalWrite(LED, LOW);    // 熄灭LED
  delay(1000);               // 持续1秒
}

arduino