/*
 * A simple programme that will produce both light and sound
 * based on the amount of light detected on the photo resister.
 * This example uses 8 LED's, a Piezo speaker and 
 * the photo resister from the ARDX KIT (oomlout.com)
 * You can also open the 'Serial Monitor' to view to values
 * of resistance that the phot resistor is reporting.
 * theMcMurray's (Ian, Scott and Toby) Oct 2009
 */

//PhotoResistor Pin
int lightPin = 0; //the analog pin the photoresistor is 
                  //connected to
                  //the photoresistor is not calibrated to any units so
                  //this is simply a raw sensor value (relative light)
//LED Pins
int ledPins[] = {2,3,4,5,6,7,8,9};

//Piezo Pin
int piezoPin = 11;

void playTone(int tone, int duration) {
  for (long i = 0; i < duration * 1000L; i += tone * 2) {
    digitalWrite(piezoPin, HIGH);
    delayMicroseconds(tone);
    digitalWrite(piezoPin, LOW);
    delayMicroseconds(tone);
  }
}

void playNote(char note, int duration) {
  char names[] = { 'B', 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
  int tones[] = { 2000, 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956};
  
  // play the tone corresponding to the note name
  for (int i = 0; i < 8; i++) {
    if (names[i] == note) {
      playTone(tones[i], duration);
    }
  }
}

void setup()
{
  Serial.begin(9600);
  for(int i=0; i < 8; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  
  pinMode(piezoPin, OUTPUT);
}
 /*
 * loop() - this function will start after setup 
 * finishes and then repeat
 */
void loop()
{
 int lightLevel = analogRead(lightPin); //Read the
                                        // lightlevel
 lightLevel = map(lightLevel, 0, 900, 0, 255); 
         //adjust the value 0 to 900 to
         //span 0 to 255
lightLevel = constrain(lightLevel, 0, 255);//make sure the 
                                           //value is betwween 
                                           //0 and 255
 Serial.println(lightLevel);
 char playMe = 'B';
 if ( lightLevel > 30 ) { digitalWrite(9, HIGH); playMe = 'c'; } else { digitalWrite(9, LOW); } 
 if ( lightLevel > 60 ) { digitalWrite(8, HIGH); playMe = 'd'; } else { digitalWrite(8, LOW); }
 if ( lightLevel > 90 ) { digitalWrite(7, HIGH); playMe = 'e'; } else { digitalWrite(7, LOW); }
 if ( lightLevel > 120 ) { digitalWrite(6, HIGH); playMe = 'f';} else { digitalWrite(6, LOW); }
 if ( lightLevel > 150 ) { digitalWrite(5, HIGH); playMe = 'g';} else { digitalWrite(5, LOW); }
 if ( lightLevel > 180 ) { digitalWrite(4, HIGH); playMe = 'a';} else { digitalWrite(4, LOW); }
 if ( lightLevel > 210 ) { digitalWrite(3, HIGH); playMe = 'b';} else { digitalWrite(3, LOW); }
 if ( lightLevel > 240 ) { digitalWrite(2, HIGH); playMe = 'C';} else { digitalWrite(2, LOW); }
 playNote(playMe,50);
 analogWrite(piezoPin, lightLevel);  //write the value
}