/* Program 7-1 Read the analog value of the pin connected to the pontentiometer.
 * The potentiometer is connected pin A1.
 * The ADC has 10-bit resolution for AVR and default is 10-bit in Arduino.  */
/* Pin A1 is connected to a potentiometer */
const int pot = A1;
void setup() {
    Serial.begin(9600);
    Serial.println("Potentiometer:");
}
void loop() {
    /* read the voltage from ADC */
    int potValue = analogRead(pot);
/* write it to the Serial monitor */
    Serial.print("  potentiometer value = ");
    Serial.println(potValue, DEC);
    delay(100);
}