Program a potentiometer

This program will allow adjust the speed of a blinking LED with analog input. Follow this patch to connect a potentiometer to your Arduino board. Then put an the long lead of an LED in pin 13 of your digital in/out, and the short lead in Ground.

 potentiometer.pdf

/*

 * AnalogInput

 * by DojoDave <http://www.0j0.org>

 *

 * Turns on and off a light emitting diode(LED) connected to digital  

 * pin 13. The amount of time the LED will be on and off depends on

 * the value obtained by analogRead(). In the easiest case we connect

 * a potentiometer to analog pin 2.

 */

int potPin = 2;    // select the input pin for the potentiometer

int ledPin = 13;   // select the pin for the LED

int val = 0;       // variable to store the value coming from the sensor

void setup() {

  pinMode(ledPin, OUTPUT);  // declare the ledPin as an OUTPUT

}

void loop() {

  val = analogRead(potPin);    // read the value from the sensor

  digitalWrite(ledPin, HIGH);  // turn the ledPin on

  delay(val);                  // stop the program for some time

  digitalWrite(ledPin, LOW);   // turn the ledPin off

  delay(val);                  // stop the program for some time

}