const int LED1 = 6;
const int POT = A2;
int valorPot;
int duty;

void setup()
{
  Serial.begin(9600);
  pinMode(LED1, OUTPUT); digitalWrite(LED1, LOW);
}

void loop() {
 valorPot = analogRead(POT);
 duty = map(valorPot, 0, 1023, 0, 255);
 analogWrite(LED1, duty); Serial.println(duty);
 delay(30);
}