Tap for Tune

Tap for Tune

Play a tune every time the speaker is tapped. Uses analog input A0 to both detect and play the tune.

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#define NOTE_A2  110

#define NOTE_AS2 117

#define NOTE_B2  123

#define NOTE_C3  131

#define NOTE_CS3 139

#define NOTE_D3  147

#define NOTE_DS3 156

#define NOTE_E3  165

#define NOTE_F3  175

#define NOTE_FS3 185

#define NOTE_G3  196

#define NOTE_GS3 208

#define NOTE_A3  220

#define NOTE_AS3 233

#define NOTE_B3  247

#define NOTE_C4  262

#define NOTE_CS4 277

#define NOTE_D4  294

#define NOTE_DS4 311

#define NOTE_E4  330

// notes in the melody: shave and and a haircut

int melody[] = {NOTE_C4, NOTE_G3, NOTE_G3, NOTE_A3, NOTE_G3, 0, NOTE_B3, NOTE_C4};

// note durations: 4 = quarter note, 8 = eighth note, etc

int noteDurations[] = {4, 8, 8, 4, 4, 4, 4, 4};

byte tapCount = 0;

long int tapTime = millis();

void setup()

{

}

void loop()

{

int sensorValue = analogRead(A0);

Serial.println(sensorValue);

 //detect a tap

    if(sensorValue > 10)

    {

    delay(100);

    pinMode(A0, OUTPUT);

    playTune();

    pinMode(A0, INPUT);

    delay(100);

    }

}

void playTune()

{

for (int Note = 0; Note < 8; Note++)

{

int noteDuration = 1000 / noteDurations[Note];

tone(A0, melody[Note], noteDuration);

int pauseBetweenNotes = noteDuration * 1.30;

delay(pauseBetweenNotes);

noTone(A0);}

}

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Things to do:

1) Use the tap detection portion of the program to turn devices on and off
2) Create a combination lock using tap detection
3) Build a reaction detector that measure time between taps
4) Use the detector as a target game for airsoft gun or ping pong balls
5) Use speaker, with small weight attached to cone, to detect acceleration by measuring max signal from speaker
6) Use as a user interface for menu of options by tapping menu item number