const int pinPot = A0;
  const int pinLED = 9;
  
  int brightness = 0;
  int levelsensor=0;
  float sensor,vin;
  void setup() {
    pinMode(pinPot, INPUT);
    pinMode(pinLED, OUTPUT);
    Serial.begin(9600);
  }

 
  void loop() {
    // baca nilai kaki A0 (sensor, potensiometer)
    sensor = analogRead(pinPot);
    vin=sensor*5/1024;
    // konversi nilai 0-1023 (Analog) menjadi 0-255 (PWM)
    brightness = map(sensor, 0, 1023, 0, 255); 
    levelsensor = map(sensor, 0, 1023, 0, 100);
    
    // tentukan brightness LED dengan PWM
    analogWrite(pinLED, brightness);
    Serial.print("level sensor : ");    Serial.println(levelsensor);
    Serial.print("digital PWM : ");    Serial.println(brightness);
    Serial.print("Adc : ");    Serial.println(sensor);
    Serial.print("vin : ");    Serial.println(vin,3);
    delay(1000);
  }