#define LED 11
#define BOTON 3
#define POTEN A1

void setup() {
  pinMode(LED, OUTPUT);
  pinMode(BOTON, INPUT_PULLUP);
}

void loop() {
  if(digitalRead(BOTON)==LOW){
    int VALOR = analogRead(POTEN);
    int BRILLO = map(VALOR, 0, 1023, 0, 255);
    analogWrite(LED, BRILLO);

  }

}