/*
Control LED fading with potentiometer

 The circuit:
  Potentiometer attached to analog input 0
 * center pin of the potentiometer to the analog pin
 * one side pin (either one) to ground
 * the other side pin to +5V
 * LED anode (long leg) attached to digital output 9
 * LED cathode (short leg) attached to ground
 
 Created by Luke Woodbury
 6 Jan 2016

 */

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

void loop() {
  // read the value from the sensor:
  sensorValue = analogRead(sensorPin);
  //remap the sensor value from 0-1023 to 0-255 for LED PWM fading
  sensorValue = map(sensorValue, 0, 1023, 0, 255);
  //print sensorVal to serial monitor
  Serial.println(sensorValue);
  //write value to LED pin as PWM
  analogWrite(ledPin, sensorValue);

}