/*******************************************************************************
*
*    Projeto 34 – Tocar melodia com um disco piezoelétrico
*                   http://squids.com.br/arduino
*
*******************************************************************************/
 
#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
#define NOTE_F4 349
#define NOTE_FS4 370
#define NOTE_G4 392
#define NOTE_GS4 415
#define NOTE_A4 440
#define NOTE_AS4 466
#define NOTE_B4 494

#define WHOLE 1
#define HALF 0.5
#define QUARTER 0.25
#define EIGHTH 0.125
#define SIXTEENTH 0.0625

int tune[] = { NOTE_C4, NOTE_C4, NOTE_C4, NOTE_C4, NOTE_C4, NOTE_B3, NOTE_G3, NOTE_A3,
NOTE_C4, NOTE_C4, NOTE_G3, NOTE_G3, NOTE_F3, NOTE_F3, NOTE_G3, NOTE_F3, NOTE_E3, NOTE_G3,
NOTE_C4, NOTE_C4, NOTE_C4, NOTE_C4, NOTE_A3, NOTE_B3, NOTE_C4, NOTE_D4};

float duration[] = { EIGHTH, QUARTER+EIGHTH, SIXTEENTH, QUARTER, QUARTER, HALF, HALF,
HALF, QUARTER, QUARTER, HALF+QUARTER, QUARTER, QUARTER, QUARTER, QUARTER+EIGHTH, EIGHTH,
QUARTER, QUARTER, QUARTER, EIGHTH, EIGHTH, QUARTER, QUARTER, QUARTER, QUARTER,
HALF+QUARTER};

int comprimento;

void setup() {
pinMode(4, OUTPUT);
comprimento = sizeof(tune) / sizeof(tune[0]);
}

void loop() {
for (int x=0; x<comprimento; x++) {
tone(4, tune[x]);
delay(1500 * duration[x]);
noTone(4);
}
delay(3000);
}