int ledPin = 2;      
int potensioPin = 34;   
int val = 0;        
void setup()
{
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT);  
}

void loop(){
  val = analogRead(potensioPin); 
  int pwm = val/4;
  analogWrite(ledPin, pwm);
  Serial.print("Nilai PWM adalah : ");
  Serial.println(pwm);
  Serial.println(val);
}