Arduino cơ bản 3: PWM | Thay đổi ánh sáng của LED trên Arduino

/*
   Fading Light
   This example shows how to fade an LED on pin 10 using the analogWrite() function.
*/
int ledPin = 6;       // the pin that the LED is attached to

void setup() {
      // declare pin 9 to be an output:
      pinMode(ledPin,OUTPUT);
      // initialize serial communication at 9600 bits per second:
      Serial.begin(9600);
}

void loop(){
      fadeOn(2000,5);
      fadeOff(2000,5);
}

void fadeOn(unsigned int time,int increament){
       //change the brightness by FOR statement
    for (byte value = 0 ; value < 255; value+=increament){ 
                // print out the value:
            Serial.println(value);
                // set the brightness of pin 10:
        analogWrite(ledPin, value);
        delay(time/(255/5));
        } 
}

void fadeOff(unsigned int time,int decreament){
       //change the brightness by FOR statement
    for (byte value = 255; value >0; value-=decreament){ 
            Serial.println(value);
        analogWrite(ledPin, value); 
        delay(time/(255/5)); 
    }
}

void fadeOn(unsigned int time,int increament){
       //change the brightness by FOR statement
  for (byte value = 0 ; value < 255; value+=increament){ 
                // print out the value:
          Serial.println(value);
                // set the brightness of pin 10:
    analogWrite(ledPin, value);
    delay(time/(255/5));
        } 
}

analogWrite(ledPin, value);