touchSpeaker.ino

/*
 * This is the work D.B. of South Hamilton High School.
 * It draws on the started code from SparkFun.
 */

const int SENSOR_PIN = 0;

const int BUZZER_PIN = 9;

const int c_pin = 2;
const int d_pin = 3;
const int e_pin = 4;
const int f_pin = 5;
const int g_pin = 6;
const int a_pin = 7;
const int b_pin = 8;
const int C_pin = 10;


void setup() {
  
  pinMode(BUZZER_PIN, OUTPUT);
  
  Serial.begin(9600);
}

void loop() {
  int sensorValue;
  
  sensorValue = analogRead(SENSOR_PIN);
  
  Serial.println(sensorValue);
  
  if (sensorValue > 20 && sensorValue < 129){
    tone(BUZZER_PIN, frequency('c'));
    digitalWrite(c_pin, HIGH);
    turnOffOthers(2);
  } else if (sensorValue > 128 && sensorValue < 257){
    tone(BUZZER_PIN, frequency('d'));
    digitalWrite(d_pin, HIGH);
    turnOffOthers(3);
  }else if (sensorValue > 256 && sensorValue < 384) {
    tone(BUZZER_PIN, frequency('e'));
    digitalWrite(e_pin, HIGH);
    turnOffOthers(4);
  }else if (sensorValue > 383 && sensorValue < 512){
    tone(BUZZER_PIN, frequency('f'));
    digitalWrite(f_pin, HIGH);
    turnOffOthers(5);
  }else if (sensorValue > 511 && sensorValue < 640){
    tone(BUZZER_PIN, frequency('g'));
    digitalWrite(g_pin, HIGH);
    turnOffOthers(6);
  }else if (sensorValue > 639 && sensorValue < 768){
    tone(BUZZER_PIN, frequency('a'));  
    digitalWrite(a_pin, HIGH);
    turnOffOthers(7);
  }else if (sensorValue > 767 && sensorValue < 896){
    tone(BUZZER_PIN, frequency('b'));
    digitalWrite(b_pin, HIGH);
    turnOffOthers(8);
  }else if (sensorValue > 895 && sensorValue < 1024){
    tone(BUZZER_PIN, frequency('C'));
    digitalWrite(C_pin, HIGH);
    turnOffOthers(10);
  }else if (sensorValue < 20){
    noTone(BUZZER_PIN);
    digitalWrite(c_pin, LOW);
    digitalWrite(d_pin, LOW);
    digitalWrite(e_pin, LOW);
    digitalWrite(f_pin, LOW);
    digitalWrite(g_pin, LOW);
    digitalWrite(a_pin, LOW);
    digitalWrite(b_pin, LOW);
    digitalWrite(C_pin, LOW);
  }
  
}

int frequency(char note) 
{
  // This function takes a note character (a-g), and returns the
  // corresponding frequency in Hz for the tone() function.
  
  int i;
  const int numNotes = 8;  // number of notes we're storing
  
  // The following arrays hold the note characters and their
  // corresponding frequencies. The last "C" note is uppercase
  // to separate it from the first lowercase "c". If you want to
  // add more notes, you'll need to use unique characters.

  // For the "char" (character) type, we put single characters
  // in single quotes.

  char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
  int frequencies[] = {262, 294, 330, 349, 392, 440, 494, 523};
  
  // Now we'll search through the letters in the array, and if
  // we find it, we'll return the frequency for that note.
  
  for (i = 0; i < numNotes; i++)  // Step through the notes
  {
    if (names[i] == note)         // Is this the one?
    {
      return(frequencies[i]);     // Yes! Return the frequency
    }
  }
  return(0);  // We looked through everything and didn't find it,
              // but we still need to return a value, so return 0.
}

void turnOffOthers( int keepOn  ){
   for(int i=2;(i<=10&&i!=9); i=i+1){
    if(i!=keepOn){
     digitalWrite( i , LOW);
    }
  }
}