/* Milk light potentiometer code
 * -----------------------------
 *
 * By David Hayward
 *
 * www.instructables.com/member/Nachimir
 *
 * Turns a bank of LED lights on and off in sequence depending on the reading from a potentiometer.
 *
 * Based partly on Analog Read to LED by DojoDave <http://www.0j0.org>
 */


int potPin = 2;    // select the input pin for the potentiometer (Analog pin AD2)
int led1 = 4;
int led2 = 5;
int led3 = 6;
int led4 = 7;
int led5 = 8;
int led6 = 9;
int led7 = 10;
int led8 = 11;
int led9 = 12;
int led10 = 13;
int led11 = 14;
int led12 = 15;
int val = 0;      // variable to store the value coming from the sensor

void setup() {
  pinMode(led1, OUTPUT);  // declare the ledPin as an OUTPUT
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  pinMode(led6, OUTPUT);
  pinMode(led7, OUTPUT);
  pinMode(led8, OUTPUT);
  pinMode(led9, OUTPUT);
  pinMode(led10, OUTPUT);
  pinMode(led11, OUTPUT);
  pinMode(led12, OUTPUT);
}

void loop() {
if (digitalRead(6) == HIGH && digitalRead(5) == LOW) {

  digitalWrite(led3, LOW);    // the mini sets this pin high upon startup for some reason
}

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


if (val <= 30) {

  digitalWrite(led1, LOW);    // set last pin to LOW when turning potentiometer down.
}

if (val >= 35){

  digitalWrite(led1, HIGH);   // set 1st HIGH when turning up, keep HIGH when turning down.
  digitalWrite(led2, LOW);    // set 2nd low when turning down.
}

if (val >= 48){

  digitalWrite(led2, HIGH);
  digitalWrite(led3, LOW);
}

if (val >= 65){

  digitalWrite(led3, HIGH);
  digitalWrite(led4, LOW); 
}

if (val >= 90){
  
  digitalWrite(led4, HIGH); 
  digitalWrite(led5, LOW);
}

if (val >= 144){
 
  digitalWrite(led5, HIGH);
  digitalWrite(led6, LOW);
}

if (val >= 180){              // this is approx half the travel of the log pot I used

  digitalWrite(led6, HIGH);
  digitalWrite(led7, LOW);
}


if (val >= 255){

  digitalWrite(led7, HIGH);
  digitalWrite(led8, LOW);
}


if (val >= 340){

  digitalWrite(led8, HIGH);
  digitalWrite(led9, LOW);
}

if (val >= 480){

  digitalWrite(led9, HIGH);
  digitalWrite(led10, LOW);
}

if (val >= 660){

  digitalWrite(led10, HIGH);
  digitalWrite(led11, LOW);
}

if (val >= 870){

  digitalWrite(led11, HIGH);
  digitalWrite(led12, LOW);
}

if (val >= 1001){

  digitalWrite(led12, HIGH);
}

}