Ardunio_Case_5_breath_light

breath light

上面的这个链接讲的很好。

 int ledPin = 10;   void setup() {  // put your setup code here, to run once:  pinMode(ledPin, OUTPUT);}void loop() {  // put your main code here, to run repeatedly:  fadeOn(1000,5);  fadeOff(1000,5);}void fadeOn(unsigned int time, int increment){    for(byte value = 0; value< 255; value += increment){      analogWrite(ledPin,value);   //采用PWM pulse Width Modulation 来实现模拟信息的输出      delay(time/(255/increment));  //通过函数获得的两个变量time 和 increment 来获取LED灯的延迟    }  } void fadeOff(unsigned int time, int decrement){    for(byte value = 255; value > 0; value-= decrement){      analogWrite(ledPin, value);      delay(time/(255/decrement));      }    }