#define pinLED 19  
const int pinPotensio = 34;
 
void setup() {
  Serial.begin(9600);
  pinMode(pinLED, OUTPUT); 
}
 
void loop() {
  int dataPotensio = analogRead(pinPotensio);
  int mapData = map(dataPotensio, 0, 1023, 0, 255);
  analogWrite(pinLED, mapData); 
  Serial.println(dataPotensio);
  Serial.println(mapData);
 
  delay(200);
}