[Chi-Ting & Theyab] How to troll your friends, again, in an Arduino way

INSPIRATION

On the internet, there’s a way of making people listen to a specific song, but in a new way every time. We decided to use Arduino to do just that.

IDEA

A switch to start playing the song and stop playing the song.

A potentiometer to fasten or slow down the tempo of the song.

BREADBOARD

Here

VIDEO DEMO

CODES

int speaker_pin = 2;
bool Switch = LOW;


volatile int tone_length = 100; // determines tempo



// Parts 1 and 2 (Intro)

int melody[] =
{
  554, 622, 622, 698, 831, 740, 698, 622, 554, 622, -1, 415, 415,
  554, 622, 622, 698, 831, 740, 698, 622, 554, 622, -1, 415, 415,
  -1, 277, 277, 277, 277, 311,
  -1, 261, 233, 208,
  -1, 233, 233, 261, 277, 208, 415, 415, 311,
  -1, 233, 233, 261, 277, 233, 277, 311,
  -1, 261, 233, 233, 208,
  -1, 233, 233, 261, 277, 208, 208, 311, 311, 311, 349, 311, 277, 311, 349, 277, 311, 311, 311, 349, 311, 208,
  -1, 233, 261, 277, 208, -1, 311, 349, 311,
  -1, 277, 277, 277, 277, 311,
  -1, 261, 233, 208,
  -1, 233, 233, 261, 277, 208, 415, 415, 311,
  -1, 233, 233, 261, 277, 233, 277, 311,
  -1, 261, 233, 233, 208,
  -1, 233, 233, 261, 277, 208, 208, 311, 311, 311, 349, 311, 277, 311, 349, 277, 311, 311, 311, 349, 311, 208,
  -1, 233, 261, 277, 208, -1, 311, 349, 311,
  466, 466, 415, 415, 698, 698, 622, 466, 466, 415, 415, 622, 622, 554, 523, 466, 554, 554, 554, 554, 554, 622, 523, 466, 415, 415, 415, 622, 554, 466, 466, 415, 415,
  698, 698, 622, 466, 466, 415, 415, 831, 523, 554, 523, 466, 554, 554, 554, 554, 554, 622, 523, 466, 415, -1, 415, 622, 554, -1,
  466, 466, 415, 415, 698, 698, 622, 466, 466, 415, 415, 622, 622, 554, 523, 466, 554, 554, 554, 554, 554, 622, 523, 466, 415, 415, 415, 622, 554, 466, 466, 415, 415,
  698, 698, 622, 466, 466, 415, 415, 831, 523, 554, 523, 466, 554, 554, 554, 554, 554, 622, 523, 466, 415, -1, 415, 622, 554, -1

};

int rhythmn[] =
{
  6, 10, 6, 6, 1, 1, 1, 1, 6, 10, 4, 2, 10,
  6, 10, 6, 6, 1, 1, 1, 1, 6, 10, 4, 2, 10,
  2, 1, 1, 1, 1, 2, 1, 1, 1, 5, 1, 1, 1, 1, 3, 1, 2, 1, 5, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1,
  3, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 4, 5, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 3, 1, 1, 1, 3,
  2, 1, 1, 1, 1, 2, 1, 1, 1, 5, 1, 1, 1, 1, 3, 1, 2, 1, 5, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1,
  3, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 4, 5, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 3, 1, 1, 1, 3,
  1, 1, 1, 1, 3, 3, 6, 1, 1, 1, 1, 3, 3, 3, 1, 2, 1, 1, 1, 1, 3, 3, 3, 1, 2, 2, 2, 4, 8, 1, 1, 1, 1,
  3, 3, 6, 1, 1, 1, 1, 3, 3, 3, 1, 2, 1, 1, 1, 1,  3, 3, 3, 1, 2, 2, 2, 4, 8, 4,
  1, 1, 1, 1, 3, 3, 6, 1, 1, 1, 1, 3, 3, 3, 1, 2, 1, 1, 1, 1, 3, 3, 3, 1, 2, 2, 2, 4, 8, 1, 1, 1, 1,
  3, 3, 6, 1, 1, 1, 1, 3, 3, 3, 1, 2, 1, 1, 1, 1,  3, 3, 3, 1, 2, 2, 2, 4, 8, 4,
  1, 1, 1, 1, 3, 3, 6, 1, 1, 1, 1, 3, 3, 3, 1, 2, 1, 1, 1, 1, 3, 3, 3, 1, 2, 2, 2, 4, 8, 1, 1, 1, 1,
  3, 3, 6, 1, 1, 1, 1, 3, 3, 3, 1, 2, 1, 1, 1, 1,  3, 3, 3, 1, 2, 2, 2, 4, 8, 4
};

// Parts 3 or 5 (Verse 1)





void setup()
{
  pinMode(2, OUTPUT);

  pinMode(3 , INPUT_PULLUP);

  Serial.begin(9600);

  //while (digitalRead(3));
}

void loop()
{
  Switch = digitalRead(3);
  int note_delay;

  check_pot();
  if (Switch == HIGH) {
    for (int i = 0 ; i < sizeof(rhythmn) ; i++)
    {
      if (melody[i] > 0) {

        check_pot();
        note_delay = tone_length * rhythmn[i];
        tone(speaker_pin, melody[i], note_delay);
      }
      delay(note_delay);
      delay(tone_length * 0.3);

    }
    delay(note_delay);
    noTone(speaker_pin);
  }


}

void check_pot()
{
  tone_length = map(analogRead(A0) , 0 , 1023 , 10 , 200);

}

CHALLENGES

It was a hassle trying to locate the frequencies of the notes and manipulate the duration intervals between each note.