#define POT 32

int valor = 0;
void setup()
{
  Serial.begin (9600);
  analogReadResolution (9);
  delay (100);

}
void loop()
{
  analogReadResolution (9);
  valor = analogRead(POT);
  Serial.print("9 bits: ");
  Serial.print(valor);
  Serial.print("   ");
  
  analogReadResolution (10);
  valor = analogRead(POT);
  Serial.print("10 bits: ");
  Serial.print(valor);
  Serial.print("   ");
  
  analogReadResolution (11);
  valor = analogRead(POT);
  Serial.print("11 bits: ");
  Serial.print(valor);
  Serial.print("   ");
  
  analogReadResolution (12);
  valor = analogRead(POT);
  Serial.print("12 bits: ");
  Serial.println(valor);
  delay (500);
}