在这里插入代码片#
交通灯效果 ：

南北方向的通行时间为50秒，东西方向的通行时间为20秒，过渡黄灯时间为5秒，过渡期间黄灯闪烁5次
1南北绿，东西红—2南北黄，东西红—3南北红，东西绿—4南北红，东西黄

代码：

           int NorthSouthR=7; 
           int NorthSouthG=12;
           int NorthSouthY=11;
           int EastWestR=10;
           int EastWestG=9;
           int EastWestY=8;
void setup()
{
  pinMode(NorthSouthR, OUTPUT);
  pinMode(NorthSouthG, OUTPUT);
  pinMode(NorthSouthY, OUTPUT);
  pinMode(EastWestR, OUTPUT);
  pinMode(EastWestG, OUTPUT);
  pinMode(EastWestY, OUTPUT);
}


void loop() 
{
 digitalWrite(NorthSouthG, HIGH);
 digitalWrite(EastWestR, HIGH);
 delay(50000);
 digitalWrite(NorthSouthG, LOW);
 digitalWrite(NorthSouthY, HIGH);
 for(int i =1;i<6;i++)
 {
  digitalWrite(NorthSouthY, HIGH);
  delay(500);
  digitalWrite(NorthSouthY, LOW);
  delay(500);
  }
 digitalWrite(EastWestR, LOW);
 digitalWrite(NorthSouthR, HIGH);
 digitalWrite(EastWestG, HIGH);
 delay(20000);
 digitalWrite(EastWestG, LOW);
 digitalWrite(EastWestY, HIGH);
 for(int i =1;i<6;i++)
 {
  digitalWrite(EastWestY, HIGH);
  delay(500);
  digitalWrite(EastWestY, LOW);
  delay(500);
  }
 digitalWrite(NorthSouthR, LOW);

}

连接线路：