Arduino教程02 做一个S.O.S求救信号灯「DFR0100 」

作者太棒了！怒赞！

int ledRed = 2;
int ledYellow = 3;
int ledGreen = 4;

void setup() {
    pinMode(ledRed,OUTPUT);
    pinMode(ledYellow,OUTPUT);
    pinMode(ledGreen,OUTPUT);
  }
  
void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(ledRed,HIGH);
  delay(5000);
  digitalWrite(ledYellow,HIGH);
  delay(2000);
  digitalWrite(ledRed,LOW);
  digitalWrite(ledYellow,LOW);
  digitalWrite(ledGreen,HIGH);
  delay(5000);
  digitalWrite(ledGreen,LOW);
  digitalWrite(ledYellow,HIGH);
  delay(2000);
  digitalWrite(ledYellow,LOW);
}

红绿灯。。。

//手写红绿灯 
int yellow = 10;
int red = 3;
int green = 4;

void setup() {
  // put your setup code here, to run once:
  pinMode(yellow,OUTPUT);
  pinMode(red,OUTPUT);
  pinMode(green,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int i = 0;
  for (i=0;i<5;i++){
    digitalWrite(red,HIGH);
    delay(1000);
  }
  digitalWrite(red,LOW);
  for (i=0;i<2;i++){
    digitalWrite(yellow,HIGH);
    delay(1000);
  }
  digitalWrite(yellow,LOW);
  for (i=0;i<5;i++){
    digitalWrite(green,HIGH); 
    delay(1000);
  }
  digitalWrite(green,LOW);
  for (i=0;i<2;i++){
    digitalWrite(yellow,HIGH);
    delay(1000);
  }
  digitalWrite(yellow,LOW);
}
复制代码

int red = 7, yellow = 3, green = 4;
void setup() { pinMode(red,OUTPUT);  
pinMode(yellow,OUTPUT);  
pinMode(green,OUTPUT);
}  

void loop() {   
digitalWrite(red,HIGH);
digitalWrite(yellow,LOW);
digitalWrite(green,LOW);
delay(5000);  

digitalWrite(red,HIGH);
digitalWrite(yellow,HIGH);
digitalWrite(green,LOW);
delay(2000);

digitalWrite(red,LOW);
digitalWrite(yellow,LOW);
digitalWrite(green,HIGH);
delay(5000);  

digitalWrite(red,LOW);
digitalWrite(yellow,HIGH);
digitalWrite(green,LOW);
delay(2000);
}

选了一个最简单粗暴的做法实现红绿灯.反正就4个状态嘛，那就直接全局变量状态，然后判断状态值是什么再显示，简单粗暴其实不错，代码不贴了太简单