流水灯代码 

// 定义连接LED的引脚
const int led1 =1;
const int led2 = 2;
const int led3 = 3;
const int led4 = 4;
const int led5 = 5;

void setup() {
  // 初始化所有引脚为输出模式
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  
}

void loop() {
  // 依次点亮所有LED
  digitalWrite(led1, HIGH);
  delay(500); // 等待500毫秒
  digitalWrite(led1, LOW);

  digitalWrite(led2, HIGH);
  delay(500);
  digitalWrite(led2, LOW);

  digitalWrite(led3, HIGH);
  delay(500);
  digitalWrite(led3, LOW);

  digitalWrite(led4, HIGH);
  delay(500);
  digitalWrite(led4, LOW);

  digitalWrite(led5, HIGH);
  delay(500);
  digitalWrite(led5, LOW);

}

for循环简化代码

// 定义连接LED的引脚

void setup() {
  // 初始化所有引脚为输出模式
  for(int i=1;i<=5;i++){
    pinMode(i,OUTPUT);
  }
  
}

void loop() {
  // 依次点亮所有LED
  for(int i=1;i<=5;i++){
    digitalWrite(i,HIGH);
    delay(500);
    digitalWrite(i,LOW);
  }
  
}

呼吸灯代码 

const int redPin = 9;   // 红色LED连接的PWM引脚
const int greenPin = 10; // 绿色LED连接的PWM引脚
const int bluePin = 11;  // 蓝色LED连接的PWM引脚
int brightness = 0;      // 初始亮度
int fadeAmount = 5;      // 每次亮度变化的量

void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  // 逐渐增加亮度
  for (brightness = 0; brightness <= 255; brightness += fadeAmount) {
    analogWrite(redPin, brightness);
    analogWrite(greenPin, brightness);
    analogWrite(bluePin, brightness);
    delay(30);
  }

  // 逐渐减少亮度
  for (brightness = 255; brightness >= 0; brightness -= fadeAmount) {
    analogWrite(redPin, brightness);
    analogWrite(greenPin, brightness);
    analogWrite(bluePin, brightness);
    delay(30);
  }
}

 火焰灯代码

// 定义连接到RGB LED的PWM引脚
const int redPin = 9;
const int greenPin = 10;
const int bluePin = 11;

void setup() {
  // 设置引脚为输出模式
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
}

void loop() {
  // 模拟火焰的随机闪烁
  int flicker = random(0, 150); // 产生0到150之间的随机数
  int red = 255 - flicker;      // 红色亮度
  int orange = flicker; 
  int blue=flicker;        // 橙色亮度
  
  // 设置RGB LED的颜色和亮度
  analogWrite(redPin, red);
  analogWrite(greenPin, orange ); // 绿色亮度较低
  analogWrite(bluePin, blue);            // 蓝色亮度为0
  
  // 等待一段时间，以模拟火焰的动态效果
  delay(random(50, 150));
}