gistfile1.txt

//http://www.arduino.cc/en/Tutorial/AnalogInput

int sensorPin = A0;    // select the input pin for the potentiometer
int ledPin = 9;      // select the pin for the LED
int sensorValue = 0;  // variable to store the value coming from the sensor

void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin)/4;
  analogWrite(ledPin, sensorValue);
  delay(1000);
  Serial.println(sensorValue);
}

//revisar los valores en el monitor serie o monitor serial