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edit approved Dec 8, 2020 at 8:55
the busybee
edit approved Dec 8, 2020 at 8:55
the busybee
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I am making a Christmas Tree with Arduino. I found a 12 led chaser code on internet so I made 12 rows of leds and hook them up to my Arduino pro mini. They are working just fine. However, I also want to add music with piezo buzzer while running the LEDs. Is that possible somehow or should I use another microcontroller for piezo? I also used pin 10 for piezo buzzer and used pin 14(a0) for led assigned for pin 10 previously..

Here are the codes: 12 led chaser

#define t 30 #define t1 20 #define t2 100 #define t3 50

void setup() { // set up pins 2 to 13 as outputs for (int i = 2; i <= 13; i++) { pinMode(i, OUTPUT); } } /////////////////////////////////////////////////////////////////////////////////Effect 1 void loop(){

effect_1(); effect_1();

effect_2(); effect_2();

effect_3(); effect_3();

effect_4(); effect_4();

effect_5(); effect_5();

effect_6(); effect_6();

effect_7(); effect_7(); } //left to right and right to left void effect_1() { for(int i=2; i<14; i++){ digitalWrite(i, HIGH); delay(t1); digitalWrite(i+1, HIGH); delay(t1); digitalWrite(i+2, HIGH); delay(t1); digitalWrite(i, LOW); delay(t1); digitalWrite(i+1, LOW); delay(t1); } for(int i=13; i>1; i--){ digitalWrite(i, HIGH); delay(t1); digitalWrite(i-1, HIGH); delay(t1); digitalWrite(i-2, HIGH); delay(t1); digitalWrite(i, LOW); delay(t1); digitalWrite(i-1, LOW); delay(t1); } } /////////////////////////////////////////////////////////////////////////////////Effect 2 void effect_2() { int count = 13; // keeps track of second LED movement

// move first LED from left to right and second from right to left for (int i = 2; i < 13; i++) { clear(); digitalWrite(i, HIGH); // chaser 1 digitalWrite(count, HIGH); // chaser 2 count--; // stop LEDs from appearing to stand still in the middle if (count != 7) { delay(t2); } }

// move first LED from right to left and second LED from left to right for (int i = 13; i > 2; i--) { clear(); digitalWrite(i, HIGH); // chaser 1 digitalWrite(count, HIGH); // chaser 2 count++; // stop LEDs from appearing to stand still in the middle if (count != 8) { delay(t2); } } }

////////////////////////////////////////////////////////////////////////////////Effect 3

void effect_3() { for(int i=2; i<14; i++){ digitalWrite(i, HIGH); delay(t3); } for(int i=2; i<14; i++){ digitalWrite(i, LOW); delay(t3); }

for(int i = 14; i>=2; i--){ digitalWrite(i, HIGH); delay(t3); } for(int i = 14; i>=2; i--){ digitalWrite(i, LOW); delay(t3); } } ///////////////////////////////////////////////////////////////////////////Effect 4 void effect_4() { for(int j = 2; j <= 13; j++){ digitalWrite(j, HIGH); delay(t2); j=j+1; } for(int j = 2; j <= 13; j++){ digitalWrite(j, LOW); delay(t2); }

for(int k = 15; k > 2; k--){ digitalWrite(k, HIGH); delay(t2); k=k-1; } for(int k = 15; k > 2; k--){ digitalWrite(k, LOW); delay(t2); } } //////////////////////////////////////////////////////////////////////////////Effect 5 void effect_5() { for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin, HIGH); delay(t1); digitalWrite(pin+1, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+1, HIGH); delay(t1); digitalWrite(pin+2, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+2, HIGH); delay(t1); digitalWrite(pin+3, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+3, HIGH); delay(t1); digitalWrite(pin+4, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+4, HIGH); delay(t1); digitalWrite(pin+5, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+5, HIGH); delay(t1); digitalWrite(pin+6, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+6, HIGH); delay(t1); digitalWrite(pin+7, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+7, HIGH); delay(t1); digitalWrite(pin+8, LOW); delay(t1); } for(int pin = 9; pin >= 2; pin--) { digitalWrite(pin+8, HIGH); delay(t1); digitalWrite(pin+9, LOW); delay(t1); } for(int pin = 9; pin >= 2; pin--) { digitalWrite(pin+9, HIGH); delay(t1); digitalWrite(pin+10, LOW); delay(t1); } for(int pin = 9; pin >= 2; pin--) { digitalWrite(pin+10, HIGH); delay(t1); digitalWrite(pin+11, LOW); delay(t1); } for(int pin = 14; pin >= 2; pin--) { digitalWrite(pin+11, HIGH); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin, LOW); delay(t1); } } /////////////////////////////////////////////////////////////////////////////Effect 6 void effect_6() { for(int j=2; j<14; j++){ digitalWrite(j, LOW); delay(t); digitalWrite(j, HIGH); delay(t); digitalWrite(j-2, LOW); delay(t); digitalWrite(j, HIGH); } for(int k = 15; k>2; k--){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k+2, LOW); delay(t); digitalWrite(k, HIGH); } for(int k = 2; k<14; k++){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k-2, LOW); delay(t); digitalWrite(k, HIGH); } for(int k = 15; k>2; k--){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k+4, LOW); delay(t); digitalWrite(k, HIGH); } for(int k = 2; k<14; k++){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k-4, LOW); delay(t); digitalWrite(k, HIGH); } } ///////////////////////////////////////////////////////////////////////////////////Effect 7 void effect_7() { for(int j=2; j<14; j++){ digitalWrite(j, HIGH); delay(t); digitalWrite(j+2, LOW); delay(t); } for(int k = 15; k>2; k--){ digitalWrite(k, HIGH); delay(t); digitalWrite(k+2, LOW); delay(t); } }

// function to switch all LEDs off void clear(void) { for (int i = 2; i <= 13; i++) { digitalWrite(i, LOW); } } Melody tone for buzzer: /* We Wish You a Merry Christmas - Traditional Christmas song Connect a piezo buzzer or speaker to pin 11 or select a new pin. More songs available at https://github.com/robsoncouto/arduino-songs

                                          Robson Couto, 2019

*/ #define NOTE_B0 31 #define NOTE_C1 33 #define NOTE_CS1 35 #define NOTE_D1 37 #define NOTE_DS1 39 #define NOTE_E1 41 #define NOTE_F1 44 #define NOTE_FS1 46 #define NOTE_G1 49 #define NOTE_GS1 52 #define NOTE_A1 55 #define NOTE_AS1 58 #define NOTE_B1 62 #define NOTE_C2 65 #define NOTE_CS2 69 #define NOTE_D2 73 #define NOTE_DS2 78 #define NOTE_E2 82 #define NOTE_F2 87 #define NOTE_FS2 93 #define NOTE_G2 98 #define NOTE_GS2 104 #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 #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 NOTE_C5 523 #define NOTE_CS5 554 #define NOTE_D5 587 #define NOTE_DS5 622 #define NOTE_E5 659 #define NOTE_F5 698 #define NOTE_FS5 740 #define NOTE_G5 784 #define NOTE_GS5 831 #define NOTE_A5 880 #define NOTE_AS5 932 #define NOTE_B5 988 #define NOTE_C6 1047 #define NOTE_CS6 1109 #define NOTE_D6 1175 #define NOTE_DS6 1245 #define NOTE_E6 1319 #define NOTE_F6 1397 #define NOTE_FS6 1480 #define NOTE_G6 1568 #define NOTE_GS6 1661 #define NOTE_A6 1760 #define NOTE_AS6 1865 #define NOTE_B6 1976 #define NOTE_C7 2093 #define NOTE_CS7 2217 #define NOTE_D7 2349 #define NOTE_DS7 2489 #define NOTE_E7 2637 #define NOTE_F7 2794 #define NOTE_FS7 2960 #define NOTE_G7 3136 #define NOTE_GS7 3322 #define NOTE_A7 3520 #define NOTE_AS7 3729 #define NOTE_B7 3951 #define NOTE_C8 4186 #define NOTE_CS8 4435 #define NOTE_D8 4699 #define NOTE_DS8 4978 #define REST 0

// change this to make the song slower or faster int tempo = 140;

// change this to whichever pin you want to use int buzzer = 11;

// notes of the moledy followed by the duration. // a 4 means a quarter note, 8 an eighteenth , 16 sixteenth, so on // !!negative numbers are used to represent dotted notes, // so -4 means a dotted quarter note, that is, a quarter plus an eighteenth!! int melody[] = {

// We Wish You a Merry Christmas // Score available at https://musescore.com/user/6208766/scores/1497501

NOTE_C5,4, //1 NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4, NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,

NOTE_F5,2, NOTE_C5,4, //8 NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4, NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4,

NOTE_F5,4, NOTE_F5,4, NOTE_F5,4,//17 NOTE_E5,2, NOTE_E5,4, NOTE_F5,4, NOTE_E5,4, NOTE_D5,4, NOTE_C5,2, NOTE_A5,4, NOTE_AS5,4, NOTE_A5,4, NOTE_G5,4, NOTE_C6,4, NOTE_C5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,

NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, //27 NOTE_E5,4, NOTE_C5,4, NOTE_C5,4, NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,4, NOTE_F5,4, NOTE_E5,2, NOTE_E5,4, NOTE_F5,4, NOTE_E5,4, NOTE_D5,4,

NOTE_C5,2, NOTE_A5,4,//36 NOTE_AS5,4, NOTE_A5,4, NOTE_G5,4, NOTE_C6,4, NOTE_C5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,

NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8,//45 NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,

NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, //53 NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, REST,4 };

// sizeof gives the number of bytes, each int value is composed of two bytes (16 bits) // there are two values per note (pitch and duration), so for each note there are four bytes int notes = sizeof(melody) / sizeof(melody[0]) / 2;

// this calculates the duration of a whole note in ms int wholenote = (60000 * 4) / tempo;

They are working just fine.

int divider = 0However, noteDuration = 0;I also want to add music with piezo buzzer while running the LEDs. Is that possible somehow or should I use another microcontroller for piezo? I also used pin 10 for piezo buzzer and used pin 14(a0) for led assigned for pin 10 previously..

void setup() { // iterate over the notes of the melody. // Remember, the array is twiceHere are the number of notes (notes + durations)codes: for (int thisNote = 0; thisNote < notes * 2; thisNote = thisNote + 2) {12 led chaser

// calculates the duration of each note
divider = melody[thisNote + 1];
if (divider > 0) {
  // regular note, just proceed
  noteDuration = (wholenote) / divider;
} else if (divider < 0) {
  // dotted notes are represented with negative durations!!
  noteDuration = (wholenote) / abs(divider);
  noteDuration *= 1.5; // increases the duration in half for dotted notes
}

// we only play the note for 90% of the duration, leaving 10% as a pause
tone(buzzer, melody[thisNote], noteDuration * 0.9);

// Wait for the specief duration before playing the next note.
delay(noteDuration);

// stop the waveform generation before the next note.
noTone(buzzer);

#define t   30
#define t1  20
#define t2  100
#define t3  50

void setup() {
  // set up pins 2 to 13 as outputs
  for (int i = 2; i <= 13; i++) {
    pinMode(i, OUTPUT);
  }
}
/////////////////////////////////////////////////////////////////////////////////Effect 1
void loop(){

effect_1();
effect_1();

 effect_2();
 effect_2();

 effect_3();
 effect_3();

 effect_4();
 effect_4();

 effect_5();
 effect_5();

 effect_6();
 effect_6();

 effect_7();
 effect_7();
  }
//left to right and right to left
void effect_1()
{
for(int i=2; i<14; i++){
digitalWrite(i, HIGH);
delay(t1);
digitalWrite(i+1, HIGH);
delay(t1);
digitalWrite(i+2, HIGH);
delay(t1);
digitalWrite(i, LOW);
delay(t1);
digitalWrite(i+1, LOW);
delay(t1);
}
for(int i=13; i>1; i--){
digitalWrite(i, HIGH);
delay(t1);
digitalWrite(i-1, HIGH);
delay(t1);
digitalWrite(i-2, HIGH);
delay(t1);
digitalWrite(i, LOW);
delay(t1);
digitalWrite(i-1, LOW);
delay(t1);
}
}
/////////////////////////////////////////////////////////////////////////////////Effect 2
void effect_2()
{
int count = 13; // keeps track of second LED movement

  // move first LED from left to right and second from right to left
  for (int i = 2; i < 13; i++) {
    clear();
    digitalWrite(i, HIGH);      // chaser 1
    digitalWrite(count, HIGH); // chaser 2
    count--;
    // stop LEDs from appearing to stand still in the middle
    if (count != 7) {
      delay(t2);
    }
  }

  // move first LED from right to left and second LED from left to right
  for (int i = 13; i > 2; i--) {
    clear();
    digitalWrite(i, HIGH);      // chaser 1
    digitalWrite(count, HIGH); // chaser 2
    count++;
    // stop LEDs from appearing to stand still in the middle
    if (count != 8) {
      delay(t2);
    }
  }
}

////////////////////////////////////////////////////////////////////////////////Effect 3

void effect_3()
{
for(int i=2; i<14; i++){
  digitalWrite(i, HIGH);
  delay(t3);
}
for(int i=2; i<14; i++){
  digitalWrite(i, LOW);
  delay(t3);
}


for(int i = 14; i>=2; i--){
  digitalWrite(i, HIGH);
  delay(t3);
}
for(int i = 14; i>=2; i--){
  digitalWrite(i, LOW);
  delay(t3);
}
}
  ///////////////////////////////////////////////////////////////////////////Effect 4
void effect_4()
{
for(int j = 2; j <= 13; j++){
  digitalWrite(j, HIGH);
  delay(t2);
  j=j+1;
  }
for(int j = 2; j <= 13; j++){
  digitalWrite(j, LOW);
  delay(t2);
  }

  for(int k = 15; k > 2; k--){
  digitalWrite(k, HIGH);
  delay(t2);
  k=k-1;
  }
for(int k = 15; k > 2; k--){
  digitalWrite(k, LOW);
  delay(t2);
  }
}
//////////////////////////////////////////////////////////////////////////////Effect 5
  void effect_5()
{
 for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin, HIGH);
  delay(t1);
  digitalWrite(pin+1, LOW);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+1, HIGH);
  delay(t1);
  digitalWrite(pin+2, LOW);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+2, HIGH);
  delay(t1);
  digitalWrite(pin+3, LOW);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+3, HIGH);
  delay(t1);
  digitalWrite(pin+4, LOW);
  delay(t1);
  }
    for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+4, HIGH);
  delay(t1);
  digitalWrite(pin+5, LOW);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+5, HIGH);
  delay(t1);
  digitalWrite(pin+6, LOW);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+6, HIGH);
  delay(t1);
  digitalWrite(pin+7, LOW);
  delay(t1);
  }
   for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+7, HIGH);
  delay(t1);
  digitalWrite(pin+8, LOW);
  delay(t1);
  }
  for(int pin = 9; pin >= 2; pin--)
  {
  digitalWrite(pin+8, HIGH);
  delay(t1);
  digitalWrite(pin+9, LOW);
  delay(t1);
  }
    for(int pin = 9; pin >= 2; pin--)
  {
  digitalWrite(pin+9, HIGH);
  delay(t1);
  digitalWrite(pin+10, LOW);
  delay(t1);
  }
  for(int pin = 9; pin >= 2; pin--)
  {
  digitalWrite(pin+10, HIGH);
  delay(t1);
  digitalWrite(pin+11, LOW);
  delay(t1);
  }
  for(int pin = 14; pin >= 2; pin--)
  {
  digitalWrite(pin+11, HIGH);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
    digitalWrite(pin, LOW);
  delay(t1);
    }
  }
  /////////////////////////////////////////////////////////////////////////////Effect 6
void effect_6()
{
for(int j=2; j<14; j++){
  digitalWrite(j, LOW);
  delay(t);
  digitalWrite(j, HIGH);
  delay(t);
  digitalWrite(j-2, LOW);
  delay(t);
  digitalWrite(j, HIGH);
}
for(int k = 15; k>2; k--){
  digitalWrite(k, LOW);
  delay(t);
  digitalWrite(k, HIGH);
  delay(t);
  digitalWrite(k+2, LOW);
  delay(t);
  digitalWrite(k, HIGH);
}
for(int k = 2; k<14; k++){
  digitalWrite(k, LOW);
  delay(t);
  digitalWrite(k, HIGH);
  delay(t);
  digitalWrite(k-2, LOW);
  delay(t);
  digitalWrite(k, HIGH);
}
for(int k = 15; k>2; k--){
  digitalWrite(k, LOW);
  delay(t);
  digitalWrite(k, HIGH);
  delay(t);
  digitalWrite(k+4, LOW);
  delay(t);
  digitalWrite(k, HIGH);
}
for(int k = 2; k<14; k++){
  digitalWrite(k, LOW);
  delay(t);
  digitalWrite(k, HIGH);
  delay(t);
  digitalWrite(k-4, LOW);
  delay(t);
  digitalWrite(k, HIGH);
} 
}
///////////////////////////////////////////////////////////////////////////////////Effect 7
void effect_7()
{
for(int j=2; j<14; j++){
  digitalWrite(j, HIGH);
  delay(t);
  digitalWrite(j+2, LOW);
  delay(t);
}
for(int k = 15; k>2; k--){
  digitalWrite(k, HIGH);
  delay(t);
  digitalWrite(k+2, LOW);
  delay(t);
}
}

// function to switch all LEDs off
void clear(void)
{
  for (int i = 2; i <= 13; i++) {
    digitalWrite(i, LOW);
  }
}

} } Melody tone for buzzer:

void loop() { // no need to repeat the melody. }

/* 
  We Wish You a Merry Christmas - Traditional Christmas song
  Connect a piezo buzzer or speaker to pin 11 or select a new pin.
  More songs available at https://github.com/robsoncouto/arduino-songs                                            
                                              
                                              Robson Couto, 2019
*/
#define NOTE_B0  31
#define NOTE_C1  33
#define NOTE_CS1 35
#define NOTE_D1  37
#define NOTE_DS1 39
#define NOTE_E1  41
#define NOTE_F1  44
#define NOTE_FS1 46
#define NOTE_G1  49
#define NOTE_GS1 52
#define NOTE_A1  55
#define NOTE_AS1 58
#define NOTE_B1  62
#define NOTE_C2  65
#define NOTE_CS2 69
#define NOTE_D2  73
#define NOTE_DS2 78
#define NOTE_E2  82
#define NOTE_F2  87
#define NOTE_FS2 93
#define NOTE_G2  98
#define NOTE_GS2 104
#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
#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 NOTE_C5  523
#define NOTE_CS5 554
#define NOTE_D5  587
#define NOTE_DS5 622
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_FS5 740
#define NOTE_G5  784
#define NOTE_GS5 831
#define NOTE_A5  880
#define NOTE_AS5 932
#define NOTE_B5  988
#define NOTE_C6  1047
#define NOTE_CS6 1109
#define NOTE_D6  1175
#define NOTE_DS6 1245
#define NOTE_E6  1319
#define NOTE_F6  1397
#define NOTE_FS6 1480
#define NOTE_G6  1568
#define NOTE_GS6 1661
#define NOTE_A6  1760
#define NOTE_AS6 1865
#define NOTE_B6  1976
#define NOTE_C7  2093
#define NOTE_CS7 2217
#define NOTE_D7  2349
#define NOTE_DS7 2489
#define NOTE_E7  2637
#define NOTE_F7  2794
#define NOTE_FS7 2960
#define NOTE_G7  3136
#define NOTE_GS7 3322
#define NOTE_A7  3520
#define NOTE_AS7 3729
#define NOTE_B7  3951
#define NOTE_C8  4186
#define NOTE_CS8 4435
#define NOTE_D8  4699
#define NOTE_DS8 4978
#define REST      0


// change this to make the song slower or faster
int tempo = 140;

// change this to whichever pin you want to use
int buzzer = 11;

// notes of the moledy followed by the duration.
// a 4 means a quarter note, 8 an eighteenth , 16 sixteenth, so on
// !!negative numbers are used to represent dotted notes,
// so -4 means a dotted quarter note, that is, a quarter plus an eighteenth!!
int melody[] = {

  // We Wish You a Merry Christmas
  // Score available at https://musescore.com/user/6208766/scores/1497501
  
  NOTE_C5,4, //1
  NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8,
  NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,
  NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8,
  NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,
  NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8,
  NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,

  NOTE_F5,2, NOTE_C5,4, //8 
  NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8,
  NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,
  NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8,
  NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,
  NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8,
  NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, NOTE_C5,4,

  NOTE_F5,4, NOTE_F5,4, NOTE_F5,4,//17
  NOTE_E5,2, NOTE_E5,4,
  NOTE_F5,4, NOTE_E5,4, NOTE_D5,4,
  NOTE_C5,2, NOTE_A5,4,
  NOTE_AS5,4, NOTE_A5,4, NOTE_G5,4,
  NOTE_C6,4, NOTE_C5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, NOTE_C5,4, 
  NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8,
  NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,
  
  NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, //27
  NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,
  NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8,
  NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, NOTE_C5,4,
  NOTE_F5,4, NOTE_F5,4, NOTE_F5,4,
  NOTE_E5,2, NOTE_E5,4,
  NOTE_F5,4, NOTE_E5,4, NOTE_D5,4,
  
  NOTE_C5,2, NOTE_A5,4,//36
  NOTE_AS5,4, NOTE_A5,4, NOTE_G5,4,
  NOTE_C6,4, NOTE_C5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, NOTE_C5,4, 
  NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8,
  NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,
  NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, 
  NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,
  
  NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8,//45
  NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, NOTE_C5,4,
  NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8,
  NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,
  NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8,
  NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,
  
  NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, //53
  NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, REST,4
};

// sizeof gives the number of bytes, each int value is composed of two bytes (16 bits)
// there are two values per note (pitch and duration), so for each note there are four bytes
int notes = sizeof(melody) / sizeof(melody[0]) / 2;

// this calculates the duration of a whole note in ms
int wholenote = (60000 * 4) / tempo;

int divider = 0, noteDuration = 0;

void setup() {
  // iterate over the notes of the melody.
  // Remember, the array is twice the number of notes (notes + durations)
  for (int thisNote = 0; thisNote < notes * 2; thisNote = thisNote + 2) {

    // calculates the duration of each note
    divider = melody[thisNote + 1];
    if (divider > 0) {
      // regular note, just proceed
      noteDuration = (wholenote) / divider;
    } else if (divider < 0) {
      // dotted notes are represented with negative durations!!
      noteDuration = (wholenote) / abs(divider);
      noteDuration *= 1.5; // increases the duration in half for dotted notes
    }

    // we only play the note for 90% of the duration, leaving 10% as a pause
    tone(buzzer, melody[thisNote], noteDuration * 0.9);

    // Wait for the specief duration before playing the next note.
    delay(noteDuration);

    // stop the waveform generation before the next note.
    noTone(buzzer);
  }
}

void loop() {
  // no need to repeat the melody.
}

I am making a Christmas Tree with Arduino. I found a 12 led chaser code on internet so I made 12 rows of leds and hook them up to my Arduino pro mini. They are working just fine. However, I also want to add music with piezo buzzer while running the LEDs. Is that possible somehow or should I use another microcontroller for piezo? I also used pin 10 for piezo buzzer and used pin 14(a0) for led assigned for pin 10 previously..

Here are the codes: 12 led chaser

#define t 30 #define t1 20 #define t2 100 #define t3 50

void setup() { // set up pins 2 to 13 as outputs for (int i = 2; i <= 13; i++) { pinMode(i, OUTPUT); } } /////////////////////////////////////////////////////////////////////////////////Effect 1 void loop(){

effect_1(); effect_1();

effect_2(); effect_2();

effect_3(); effect_3();

effect_4(); effect_4();

effect_5(); effect_5();

effect_6(); effect_6();

effect_7(); effect_7(); } //left to right and right to left void effect_1() { for(int i=2; i<14; i++){ digitalWrite(i, HIGH); delay(t1); digitalWrite(i+1, HIGH); delay(t1); digitalWrite(i+2, HIGH); delay(t1); digitalWrite(i, LOW); delay(t1); digitalWrite(i+1, LOW); delay(t1); } for(int i=13; i>1; i--){ digitalWrite(i, HIGH); delay(t1); digitalWrite(i-1, HIGH); delay(t1); digitalWrite(i-2, HIGH); delay(t1); digitalWrite(i, LOW); delay(t1); digitalWrite(i-1, LOW); delay(t1); } } /////////////////////////////////////////////////////////////////////////////////Effect 2 void effect_2() { int count = 13; // keeps track of second LED movement

// move first LED from left to right and second from right to left for (int i = 2; i < 13; i++) { clear(); digitalWrite(i, HIGH); // chaser 1 digitalWrite(count, HIGH); // chaser 2 count--; // stop LEDs from appearing to stand still in the middle if (count != 7) { delay(t2); } }

// move first LED from right to left and second LED from left to right for (int i = 13; i > 2; i--) { clear(); digitalWrite(i, HIGH); // chaser 1 digitalWrite(count, HIGH); // chaser 2 count++; // stop LEDs from appearing to stand still in the middle if (count != 8) { delay(t2); } } }

////////////////////////////////////////////////////////////////////////////////Effect 3

void effect_3() { for(int i=2; i<14; i++){ digitalWrite(i, HIGH); delay(t3); } for(int i=2; i<14; i++){ digitalWrite(i, LOW); delay(t3); }

for(int i = 14; i>=2; i--){ digitalWrite(i, HIGH); delay(t3); } for(int i = 14; i>=2; i--){ digitalWrite(i, LOW); delay(t3); } } ///////////////////////////////////////////////////////////////////////////Effect 4 void effect_4() { for(int j = 2; j <= 13; j++){ digitalWrite(j, HIGH); delay(t2); j=j+1; } for(int j = 2; j <= 13; j++){ digitalWrite(j, LOW); delay(t2); }

for(int k = 15; k > 2; k--){ digitalWrite(k, HIGH); delay(t2); k=k-1; } for(int k = 15; k > 2; k--){ digitalWrite(k, LOW); delay(t2); } } //////////////////////////////////////////////////////////////////////////////Effect 5 void effect_5() { for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin, HIGH); delay(t1); digitalWrite(pin+1, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+1, HIGH); delay(t1); digitalWrite(pin+2, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+2, HIGH); delay(t1); digitalWrite(pin+3, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+3, HIGH); delay(t1); digitalWrite(pin+4, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+4, HIGH); delay(t1); digitalWrite(pin+5, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+5, HIGH); delay(t1); digitalWrite(pin+6, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+6, HIGH); delay(t1); digitalWrite(pin+7, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+7, HIGH); delay(t1); digitalWrite(pin+8, LOW); delay(t1); } for(int pin = 9; pin >= 2; pin--) { digitalWrite(pin+8, HIGH); delay(t1); digitalWrite(pin+9, LOW); delay(t1); } for(int pin = 9; pin >= 2; pin--) { digitalWrite(pin+9, HIGH); delay(t1); digitalWrite(pin+10, LOW); delay(t1); } for(int pin = 9; pin >= 2; pin--) { digitalWrite(pin+10, HIGH); delay(t1); digitalWrite(pin+11, LOW); delay(t1); } for(int pin = 14; pin >= 2; pin--) { digitalWrite(pin+11, HIGH); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin, LOW); delay(t1); } } /////////////////////////////////////////////////////////////////////////////Effect 6 void effect_6() { for(int j=2; j<14; j++){ digitalWrite(j, LOW); delay(t); digitalWrite(j, HIGH); delay(t); digitalWrite(j-2, LOW); delay(t); digitalWrite(j, HIGH); } for(int k = 15; k>2; k--){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k+2, LOW); delay(t); digitalWrite(k, HIGH); } for(int k = 2; k<14; k++){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k-2, LOW); delay(t); digitalWrite(k, HIGH); } for(int k = 15; k>2; k--){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k+4, LOW); delay(t); digitalWrite(k, HIGH); } for(int k = 2; k<14; k++){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k-4, LOW); delay(t); digitalWrite(k, HIGH); } } ///////////////////////////////////////////////////////////////////////////////////Effect 7 void effect_7() { for(int j=2; j<14; j++){ digitalWrite(j, HIGH); delay(t); digitalWrite(j+2, LOW); delay(t); } for(int k = 15; k>2; k--){ digitalWrite(k, HIGH); delay(t); digitalWrite(k+2, LOW); delay(t); } }

// function to switch all LEDs off void clear(void) { for (int i = 2; i <= 13; i++) { digitalWrite(i, LOW); } } Melody tone for buzzer: /* We Wish You a Merry Christmas - Traditional Christmas song Connect a piezo buzzer or speaker to pin 11 or select a new pin. More songs available at https://github.com/robsoncouto/arduino-songs

                                          Robson Couto, 2019

*/ #define NOTE_B0 31 #define NOTE_C1 33 #define NOTE_CS1 35 #define NOTE_D1 37 #define NOTE_DS1 39 #define NOTE_E1 41 #define NOTE_F1 44 #define NOTE_FS1 46 #define NOTE_G1 49 #define NOTE_GS1 52 #define NOTE_A1 55 #define NOTE_AS1 58 #define NOTE_B1 62 #define NOTE_C2 65 #define NOTE_CS2 69 #define NOTE_D2 73 #define NOTE_DS2 78 #define NOTE_E2 82 #define NOTE_F2 87 #define NOTE_FS2 93 #define NOTE_G2 98 #define NOTE_GS2 104 #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 #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 NOTE_C5 523 #define NOTE_CS5 554 #define NOTE_D5 587 #define NOTE_DS5 622 #define NOTE_E5 659 #define NOTE_F5 698 #define NOTE_FS5 740 #define NOTE_G5 784 #define NOTE_GS5 831 #define NOTE_A5 880 #define NOTE_AS5 932 #define NOTE_B5 988 #define NOTE_C6 1047 #define NOTE_CS6 1109 #define NOTE_D6 1175 #define NOTE_DS6 1245 #define NOTE_E6 1319 #define NOTE_F6 1397 #define NOTE_FS6 1480 #define NOTE_G6 1568 #define NOTE_GS6 1661 #define NOTE_A6 1760 #define NOTE_AS6 1865 #define NOTE_B6 1976 #define NOTE_C7 2093 #define NOTE_CS7 2217 #define NOTE_D7 2349 #define NOTE_DS7 2489 #define NOTE_E7 2637 #define NOTE_F7 2794 #define NOTE_FS7 2960 #define NOTE_G7 3136 #define NOTE_GS7 3322 #define NOTE_A7 3520 #define NOTE_AS7 3729 #define NOTE_B7 3951 #define NOTE_C8 4186 #define NOTE_CS8 4435 #define NOTE_D8 4699 #define NOTE_DS8 4978 #define REST 0

// change this to make the song slower or faster int tempo = 140;

// change this to whichever pin you want to use int buzzer = 11;

// notes of the moledy followed by the duration. // a 4 means a quarter note, 8 an eighteenth , 16 sixteenth, so on // !!negative numbers are used to represent dotted notes, // so -4 means a dotted quarter note, that is, a quarter plus an eighteenth!! int melody[] = {

// We Wish You a Merry Christmas // Score available at https://musescore.com/user/6208766/scores/1497501

NOTE_C5,4, //1 NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4, NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,

NOTE_F5,2, NOTE_C5,4, //8 NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4, NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4,

NOTE_F5,4, NOTE_F5,4, NOTE_F5,4,//17 NOTE_E5,2, NOTE_E5,4, NOTE_F5,4, NOTE_E5,4, NOTE_D5,4, NOTE_C5,2, NOTE_A5,4, NOTE_AS5,4, NOTE_A5,4, NOTE_G5,4, NOTE_C6,4, NOTE_C5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,

NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, //27 NOTE_E5,4, NOTE_C5,4, NOTE_C5,4, NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,4, NOTE_F5,4, NOTE_E5,2, NOTE_E5,4, NOTE_F5,4, NOTE_E5,4, NOTE_D5,4,

NOTE_C5,2, NOTE_A5,4,//36 NOTE_AS5,4, NOTE_A5,4, NOTE_G5,4, NOTE_C6,4, NOTE_C5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,

NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8,//45 NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,

NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, //53 NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, REST,4 };

// sizeof gives the number of bytes, each int value is composed of two bytes (16 bits) // there are two values per note (pitch and duration), so for each note there are four bytes int notes = sizeof(melody) / sizeof(melody[0]) / 2;

// this calculates the duration of a whole note in ms int wholenote = (60000 * 4) / tempo;

int divider = 0, noteDuration = 0;

void setup() { // iterate over the notes of the melody. // Remember, the array is twice the number of notes (notes + durations) for (int thisNote = 0; thisNote < notes * 2; thisNote = thisNote + 2) {

// calculates the duration of each note
divider = melody[thisNote + 1];
if (divider > 0) {
  // regular note, just proceed
  noteDuration = (wholenote) / divider;
} else if (divider < 0) {
  // dotted notes are represented with negative durations!!
  noteDuration = (wholenote) / abs(divider);
  noteDuration *= 1.5; // increases the duration in half for dotted notes
}

// we only play the note for 90% of the duration, leaving 10% as a pause
tone(buzzer, melody[thisNote], noteDuration * 0.9);

// Wait for the specief duration before playing the next note.
delay(noteDuration);

// stop the waveform generation before the next note.
noTone(buzzer);

} }

void loop() { // no need to repeat the melody. }

I am making a Christmas Tree with Arduino. I found a 12 led chaser code on internet so I made 12 rows of leds and hook them up to my Arduino pro mini. They are working just fine.

However, I also want to add music with piezo buzzer while running the LEDs. Is that possible somehow or should I use another microcontroller for piezo? I also used pin 10 for piezo buzzer and used pin 14(a0) for led assigned for pin 10 previously..

Here are the codes: 12 led chaser

#define t   30
#define t1  20
#define t2  100
#define t3  50

void setup() {
  // set up pins 2 to 13 as outputs
  for (int i = 2; i <= 13; i++) {
    pinMode(i, OUTPUT);
  }
}
/////////////////////////////////////////////////////////////////////////////////Effect 1
void loop(){

effect_1();
effect_1();

 effect_2();
 effect_2();

 effect_3();
 effect_3();

 effect_4();
 effect_4();

 effect_5();
 effect_5();

 effect_6();
 effect_6();

 effect_7();
 effect_7();
  }
//left to right and right to left
void effect_1()
{
for(int i=2; i<14; i++){
digitalWrite(i, HIGH);
delay(t1);
digitalWrite(i+1, HIGH);
delay(t1);
digitalWrite(i+2, HIGH);
delay(t1);
digitalWrite(i, LOW);
delay(t1);
digitalWrite(i+1, LOW);
delay(t1);
}
for(int i=13; i>1; i--){
digitalWrite(i, HIGH);
delay(t1);
digitalWrite(i-1, HIGH);
delay(t1);
digitalWrite(i-2, HIGH);
delay(t1);
digitalWrite(i, LOW);
delay(t1);
digitalWrite(i-1, LOW);
delay(t1);
}
}
/////////////////////////////////////////////////////////////////////////////////Effect 2
void effect_2()
{
int count = 13; // keeps track of second LED movement

  // move first LED from left to right and second from right to left
  for (int i = 2; i < 13; i++) {
    clear();
    digitalWrite(i, HIGH);      // chaser 1
    digitalWrite(count, HIGH); // chaser 2
    count--;
    // stop LEDs from appearing to stand still in the middle
    if (count != 7) {
      delay(t2);
    }
  }

  // move first LED from right to left and second LED from left to right
  for (int i = 13; i > 2; i--) {
    clear();
    digitalWrite(i, HIGH);      // chaser 1
    digitalWrite(count, HIGH); // chaser 2
    count++;
    // stop LEDs from appearing to stand still in the middle
    if (count != 8) {
      delay(t2);
    }
  }
}

////////////////////////////////////////////////////////////////////////////////Effect 3

void effect_3()
{
for(int i=2; i<14; i++){
  digitalWrite(i, HIGH);
  delay(t3);
}
for(int i=2; i<14; i++){
  digitalWrite(i, LOW);
  delay(t3);
}


for(int i = 14; i>=2; i--){
  digitalWrite(i, HIGH);
  delay(t3);
}
for(int i = 14; i>=2; i--){
  digitalWrite(i, LOW);
  delay(t3);
}
}
  ///////////////////////////////////////////////////////////////////////////Effect 4
void effect_4()
{
for(int j = 2; j <= 13; j++){
  digitalWrite(j, HIGH);
  delay(t2);
  j=j+1;
  }
for(int j = 2; j <= 13; j++){
  digitalWrite(j, LOW);
  delay(t2);
  }

  for(int k = 15; k > 2; k--){
  digitalWrite(k, HIGH);
  delay(t2);
  k=k-1;
  }
for(int k = 15; k > 2; k--){
  digitalWrite(k, LOW);
  delay(t2);
  }
}
//////////////////////////////////////////////////////////////////////////////Effect 5
  void effect_5()
{
 for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin, HIGH);
  delay(t1);
  digitalWrite(pin+1, LOW);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+1, HIGH);
  delay(t1);
  digitalWrite(pin+2, LOW);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+2, HIGH);
  delay(t1);
  digitalWrite(pin+3, LOW);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+3, HIGH);
  delay(t1);
  digitalWrite(pin+4, LOW);
  delay(t1);
  }
    for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+4, HIGH);
  delay(t1);
  digitalWrite(pin+5, LOW);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+5, HIGH);
  delay(t1);
  digitalWrite(pin+6, LOW);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+6, HIGH);
  delay(t1);
  digitalWrite(pin+7, LOW);
  delay(t1);
  }
   for(int pin = 13; pin >= 2; pin--)
  {
  digitalWrite(pin+7, HIGH);
  delay(t1);
  digitalWrite(pin+8, LOW);
  delay(t1);
  }
  for(int pin = 9; pin >= 2; pin--)
  {
  digitalWrite(pin+8, HIGH);
  delay(t1);
  digitalWrite(pin+9, LOW);
  delay(t1);
  }
    for(int pin = 9; pin >= 2; pin--)
  {
  digitalWrite(pin+9, HIGH);
  delay(t1);
  digitalWrite(pin+10, LOW);
  delay(t1);
  }
  for(int pin = 9; pin >= 2; pin--)
  {
  digitalWrite(pin+10, HIGH);
  delay(t1);
  digitalWrite(pin+11, LOW);
  delay(t1);
  }
  for(int pin = 14; pin >= 2; pin--)
  {
  digitalWrite(pin+11, HIGH);
  delay(t1);
  }
  for(int pin = 13; pin >= 2; pin--)
  {
    digitalWrite(pin, LOW);
  delay(t1);
    }
  }
  /////////////////////////////////////////////////////////////////////////////Effect 6
void effect_6()
{
for(int j=2; j<14; j++){
  digitalWrite(j, LOW);
  delay(t);
  digitalWrite(j, HIGH);
  delay(t);
  digitalWrite(j-2, LOW);
  delay(t);
  digitalWrite(j, HIGH);
}
for(int k = 15; k>2; k--){
  digitalWrite(k, LOW);
  delay(t);
  digitalWrite(k, HIGH);
  delay(t);
  digitalWrite(k+2, LOW);
  delay(t);
  digitalWrite(k, HIGH);
}
for(int k = 2; k<14; k++){
  digitalWrite(k, LOW);
  delay(t);
  digitalWrite(k, HIGH);
  delay(t);
  digitalWrite(k-2, LOW);
  delay(t);
  digitalWrite(k, HIGH);
}
for(int k = 15; k>2; k--){
  digitalWrite(k, LOW);
  delay(t);
  digitalWrite(k, HIGH);
  delay(t);
  digitalWrite(k+4, LOW);
  delay(t);
  digitalWrite(k, HIGH);
}
for(int k = 2; k<14; k++){
  digitalWrite(k, LOW);
  delay(t);
  digitalWrite(k, HIGH);
  delay(t);
  digitalWrite(k-4, LOW);
  delay(t);
  digitalWrite(k, HIGH);
} 
}
///////////////////////////////////////////////////////////////////////////////////Effect 7
void effect_7()
{
for(int j=2; j<14; j++){
  digitalWrite(j, HIGH);
  delay(t);
  digitalWrite(j+2, LOW);
  delay(t);
}
for(int k = 15; k>2; k--){
  digitalWrite(k, HIGH);
  delay(t);
  digitalWrite(k+2, LOW);
  delay(t);
}
}

// function to switch all LEDs off
void clear(void)
{
  for (int i = 2; i <= 13; i++) {
    digitalWrite(i, LOW);
  }
}

Melody tone for buzzer:

/* 
  We Wish You a Merry Christmas - Traditional Christmas song
  Connect a piezo buzzer or speaker to pin 11 or select a new pin.
  More songs available at https://github.com/robsoncouto/arduino-songs                                            
                                              
                                              Robson Couto, 2019
*/
#define NOTE_B0  31
#define NOTE_C1  33
#define NOTE_CS1 35
#define NOTE_D1  37
#define NOTE_DS1 39
#define NOTE_E1  41
#define NOTE_F1  44
#define NOTE_FS1 46
#define NOTE_G1  49
#define NOTE_GS1 52
#define NOTE_A1  55
#define NOTE_AS1 58
#define NOTE_B1  62
#define NOTE_C2  65
#define NOTE_CS2 69
#define NOTE_D2  73
#define NOTE_DS2 78
#define NOTE_E2  82
#define NOTE_F2  87
#define NOTE_FS2 93
#define NOTE_G2  98
#define NOTE_GS2 104
#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
#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 NOTE_C5  523
#define NOTE_CS5 554
#define NOTE_D5  587
#define NOTE_DS5 622
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_FS5 740
#define NOTE_G5  784
#define NOTE_GS5 831
#define NOTE_A5  880
#define NOTE_AS5 932
#define NOTE_B5  988
#define NOTE_C6  1047
#define NOTE_CS6 1109
#define NOTE_D6  1175
#define NOTE_DS6 1245
#define NOTE_E6  1319
#define NOTE_F6  1397
#define NOTE_FS6 1480
#define NOTE_G6  1568
#define NOTE_GS6 1661
#define NOTE_A6  1760
#define NOTE_AS6 1865
#define NOTE_B6  1976
#define NOTE_C7  2093
#define NOTE_CS7 2217
#define NOTE_D7  2349
#define NOTE_DS7 2489
#define NOTE_E7  2637
#define NOTE_F7  2794
#define NOTE_FS7 2960
#define NOTE_G7  3136
#define NOTE_GS7 3322
#define NOTE_A7  3520
#define NOTE_AS7 3729
#define NOTE_B7  3951
#define NOTE_C8  4186
#define NOTE_CS8 4435
#define NOTE_D8  4699
#define NOTE_DS8 4978
#define REST      0


// change this to make the song slower or faster
int tempo = 140;

// change this to whichever pin you want to use
int buzzer = 11;

// notes of the moledy followed by the duration.
// a 4 means a quarter note, 8 an eighteenth , 16 sixteenth, so on
// !!negative numbers are used to represent dotted notes,
// so -4 means a dotted quarter note, that is, a quarter plus an eighteenth!!
int melody[] = {

  // We Wish You a Merry Christmas
  // Score available at https://musescore.com/user/6208766/scores/1497501
  
  NOTE_C5,4, //1
  NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8,
  NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,
  NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8,
  NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,
  NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8,
  NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,

  NOTE_F5,2, NOTE_C5,4, //8 
  NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8,
  NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,
  NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8,
  NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,
  NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8,
  NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, NOTE_C5,4,

  NOTE_F5,4, NOTE_F5,4, NOTE_F5,4,//17
  NOTE_E5,2, NOTE_E5,4,
  NOTE_F5,4, NOTE_E5,4, NOTE_D5,4,
  NOTE_C5,2, NOTE_A5,4,
  NOTE_AS5,4, NOTE_A5,4, NOTE_G5,4,
  NOTE_C6,4, NOTE_C5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, NOTE_C5,4, 
  NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8,
  NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,
  
  NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, //27
  NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,
  NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8,
  NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, NOTE_C5,4,
  NOTE_F5,4, NOTE_F5,4, NOTE_F5,4,
  NOTE_E5,2, NOTE_E5,4,
  NOTE_F5,4, NOTE_E5,4, NOTE_D5,4,
  
  NOTE_C5,2, NOTE_A5,4,//36
  NOTE_AS5,4, NOTE_A5,4, NOTE_G5,4,
  NOTE_C6,4, NOTE_C5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, NOTE_C5,4, 
  NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8,
  NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,
  NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, 
  NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,
  
  NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8,//45
  NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, NOTE_C5,4,
  NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8,
  NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,
  NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8,
  NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,
  
  NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, //53
  NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8,
  NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,
  NOTE_F5,2, REST,4
};

// sizeof gives the number of bytes, each int value is composed of two bytes (16 bits)
// there are two values per note (pitch and duration), so for each note there are four bytes
int notes = sizeof(melody) / sizeof(melody[0]) / 2;

// this calculates the duration of a whole note in ms
int wholenote = (60000 * 4) / tempo;

int divider = 0, noteDuration = 0;

void setup() {
  // iterate over the notes of the melody.
  // Remember, the array is twice the number of notes (notes + durations)
  for (int thisNote = 0; thisNote < notes * 2; thisNote = thisNote + 2) {

    // calculates the duration of each note
    divider = melody[thisNote + 1];
    if (divider > 0) {
      // regular note, just proceed
      noteDuration = (wholenote) / divider;
    } else if (divider < 0) {
      // dotted notes are represented with negative durations!!
      noteDuration = (wholenote) / abs(divider);
      noteDuration *= 1.5; // increases the duration in half for dotted notes
    }

    // we only play the note for 90% of the duration, leaving 10% as a pause
    tone(buzzer, melody[thisNote], noteDuration * 0.9);

    // Wait for the specief duration before playing the next note.
    delay(noteDuration);

    // stop the waveform generation before the next note.
    noTone(buzzer);
  }
}

void loop() {
  // no need to repeat the melody.
}
Source Link
Anmol Kumar
Anmol Kumar
  • 57
  • 5

Multitasking with Arduino?

I am making a Christmas Tree with Arduino. I found a 12 led chaser code on internet so I made 12 rows of leds and hook them up to my Arduino pro mini. They are working just fine. However, I also want to add music with piezo buzzer while running the LEDs. Is that possible somehow or should I use another microcontroller for piezo? I also used pin 10 for piezo buzzer and used pin 14(a0) for led assigned for pin 10 previously..

Here are the codes: 12 led chaser

#define t 30 #define t1 20 #define t2 100 #define t3 50

void setup() { // set up pins 2 to 13 as outputs for (int i = 2; i <= 13; i++) { pinMode(i, OUTPUT); } } /////////////////////////////////////////////////////////////////////////////////Effect 1 void loop(){

effect_1(); effect_1();

effect_2(); effect_2();

effect_3(); effect_3();

effect_4(); effect_4();

effect_5(); effect_5();

effect_6(); effect_6();

effect_7(); effect_7(); } //left to right and right to left void effect_1() { for(int i=2; i<14; i++){ digitalWrite(i, HIGH); delay(t1); digitalWrite(i+1, HIGH); delay(t1); digitalWrite(i+2, HIGH); delay(t1); digitalWrite(i, LOW); delay(t1); digitalWrite(i+1, LOW); delay(t1); } for(int i=13; i>1; i--){ digitalWrite(i, HIGH); delay(t1); digitalWrite(i-1, HIGH); delay(t1); digitalWrite(i-2, HIGH); delay(t1); digitalWrite(i, LOW); delay(t1); digitalWrite(i-1, LOW); delay(t1); } } /////////////////////////////////////////////////////////////////////////////////Effect 2 void effect_2() { int count = 13; // keeps track of second LED movement

// move first LED from left to right and second from right to left for (int i = 2; i < 13; i++) { clear(); digitalWrite(i, HIGH); // chaser 1 digitalWrite(count, HIGH); // chaser 2 count--; // stop LEDs from appearing to stand still in the middle if (count != 7) { delay(t2); } }

// move first LED from right to left and second LED from left to right for (int i = 13; i > 2; i--) { clear(); digitalWrite(i, HIGH); // chaser 1 digitalWrite(count, HIGH); // chaser 2 count++; // stop LEDs from appearing to stand still in the middle if (count != 8) { delay(t2); } } }

////////////////////////////////////////////////////////////////////////////////Effect 3

void effect_3() { for(int i=2; i<14; i++){ digitalWrite(i, HIGH); delay(t3); } for(int i=2; i<14; i++){ digitalWrite(i, LOW); delay(t3); }

for(int i = 14; i>=2; i--){ digitalWrite(i, HIGH); delay(t3); } for(int i = 14; i>=2; i--){ digitalWrite(i, LOW); delay(t3); } } ///////////////////////////////////////////////////////////////////////////Effect 4 void effect_4() { for(int j = 2; j <= 13; j++){ digitalWrite(j, HIGH); delay(t2); j=j+1; } for(int j = 2; j <= 13; j++){ digitalWrite(j, LOW); delay(t2); }

for(int k = 15; k > 2; k--){ digitalWrite(k, HIGH); delay(t2); k=k-1; } for(int k = 15; k > 2; k--){ digitalWrite(k, LOW); delay(t2); } } //////////////////////////////////////////////////////////////////////////////Effect 5 void effect_5() { for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin, HIGH); delay(t1); digitalWrite(pin+1, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+1, HIGH); delay(t1); digitalWrite(pin+2, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+2, HIGH); delay(t1); digitalWrite(pin+3, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+3, HIGH); delay(t1); digitalWrite(pin+4, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+4, HIGH); delay(t1); digitalWrite(pin+5, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+5, HIGH); delay(t1); digitalWrite(pin+6, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+6, HIGH); delay(t1); digitalWrite(pin+7, LOW); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin+7, HIGH); delay(t1); digitalWrite(pin+8, LOW); delay(t1); } for(int pin = 9; pin >= 2; pin--) { digitalWrite(pin+8, HIGH); delay(t1); digitalWrite(pin+9, LOW); delay(t1); } for(int pin = 9; pin >= 2; pin--) { digitalWrite(pin+9, HIGH); delay(t1); digitalWrite(pin+10, LOW); delay(t1); } for(int pin = 9; pin >= 2; pin--) { digitalWrite(pin+10, HIGH); delay(t1); digitalWrite(pin+11, LOW); delay(t1); } for(int pin = 14; pin >= 2; pin--) { digitalWrite(pin+11, HIGH); delay(t1); } for(int pin = 13; pin >= 2; pin--) { digitalWrite(pin, LOW); delay(t1); } } /////////////////////////////////////////////////////////////////////////////Effect 6 void effect_6() { for(int j=2; j<14; j++){ digitalWrite(j, LOW); delay(t); digitalWrite(j, HIGH); delay(t); digitalWrite(j-2, LOW); delay(t); digitalWrite(j, HIGH); } for(int k = 15; k>2; k--){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k+2, LOW); delay(t); digitalWrite(k, HIGH); } for(int k = 2; k<14; k++){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k-2, LOW); delay(t); digitalWrite(k, HIGH); } for(int k = 15; k>2; k--){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k+4, LOW); delay(t); digitalWrite(k, HIGH); } for(int k = 2; k<14; k++){ digitalWrite(k, LOW); delay(t); digitalWrite(k, HIGH); delay(t); digitalWrite(k-4, LOW); delay(t); digitalWrite(k, HIGH); } } ///////////////////////////////////////////////////////////////////////////////////Effect 7 void effect_7() { for(int j=2; j<14; j++){ digitalWrite(j, HIGH); delay(t); digitalWrite(j+2, LOW); delay(t); } for(int k = 15; k>2; k--){ digitalWrite(k, HIGH); delay(t); digitalWrite(k+2, LOW); delay(t); } }

// function to switch all LEDs off void clear(void) { for (int i = 2; i <= 13; i++) { digitalWrite(i, LOW); } } Melody tone for buzzer: /* We Wish You a Merry Christmas - Traditional Christmas song Connect a piezo buzzer or speaker to pin 11 or select a new pin. More songs available at https://github.com/robsoncouto/arduino-songs

                                          Robson Couto, 2019

*/ #define NOTE_B0 31 #define NOTE_C1 33 #define NOTE_CS1 35 #define NOTE_D1 37 #define NOTE_DS1 39 #define NOTE_E1 41 #define NOTE_F1 44 #define NOTE_FS1 46 #define NOTE_G1 49 #define NOTE_GS1 52 #define NOTE_A1 55 #define NOTE_AS1 58 #define NOTE_B1 62 #define NOTE_C2 65 #define NOTE_CS2 69 #define NOTE_D2 73 #define NOTE_DS2 78 #define NOTE_E2 82 #define NOTE_F2 87 #define NOTE_FS2 93 #define NOTE_G2 98 #define NOTE_GS2 104 #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 #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 NOTE_C5 523 #define NOTE_CS5 554 #define NOTE_D5 587 #define NOTE_DS5 622 #define NOTE_E5 659 #define NOTE_F5 698 #define NOTE_FS5 740 #define NOTE_G5 784 #define NOTE_GS5 831 #define NOTE_A5 880 #define NOTE_AS5 932 #define NOTE_B5 988 #define NOTE_C6 1047 #define NOTE_CS6 1109 #define NOTE_D6 1175 #define NOTE_DS6 1245 #define NOTE_E6 1319 #define NOTE_F6 1397 #define NOTE_FS6 1480 #define NOTE_G6 1568 #define NOTE_GS6 1661 #define NOTE_A6 1760 #define NOTE_AS6 1865 #define NOTE_B6 1976 #define NOTE_C7 2093 #define NOTE_CS7 2217 #define NOTE_D7 2349 #define NOTE_DS7 2489 #define NOTE_E7 2637 #define NOTE_F7 2794 #define NOTE_FS7 2960 #define NOTE_G7 3136 #define NOTE_GS7 3322 #define NOTE_A7 3520 #define NOTE_AS7 3729 #define NOTE_B7 3951 #define NOTE_C8 4186 #define NOTE_CS8 4435 #define NOTE_D8 4699 #define NOTE_DS8 4978 #define REST 0

// change this to make the song slower or faster int tempo = 140;

// change this to whichever pin you want to use int buzzer = 11;

// notes of the moledy followed by the duration. // a 4 means a quarter note, 8 an eighteenth , 16 sixteenth, so on // !!negative numbers are used to represent dotted notes, // so -4 means a dotted quarter note, that is, a quarter plus an eighteenth!! int melody[] = {

// We Wish You a Merry Christmas // Score available at https://musescore.com/user/6208766/scores/1497501

NOTE_C5,4, //1 NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4, NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4,

NOTE_F5,2, NOTE_C5,4, //8 NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4, NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4,

NOTE_F5,4, NOTE_F5,4, NOTE_F5,4,//17 NOTE_E5,2, NOTE_E5,4, NOTE_F5,4, NOTE_E5,4, NOTE_D5,4, NOTE_C5,2, NOTE_A5,4, NOTE_AS5,4, NOTE_A5,4, NOTE_G5,4, NOTE_C6,4, NOTE_C5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4,

NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, //27 NOTE_E5,4, NOTE_C5,4, NOTE_C5,4, NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,4, NOTE_F5,4, NOTE_E5,2, NOTE_E5,4, NOTE_F5,4, NOTE_E5,4, NOTE_D5,4,

NOTE_C5,2, NOTE_A5,4,//36 NOTE_AS5,4, NOTE_A5,4, NOTE_G5,4, NOTE_C6,4, NOTE_C5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,

NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8,//45 NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, NOTE_C5,4, NOTE_F5,4, NOTE_F5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,8, NOTE_D5,4, NOTE_D5,4, NOTE_D5,4, NOTE_G5,4, NOTE_G5,8, NOTE_A5,8, NOTE_G5,8, NOTE_F5,8, NOTE_E5,4, NOTE_C5,4, NOTE_C5,4,

NOTE_A5,4, NOTE_A5,8, NOTE_AS5,8, NOTE_A5,8, NOTE_G5,8, //53 NOTE_F5,4, NOTE_D5,4, NOTE_C5,8, NOTE_C5,8, NOTE_D5,4, NOTE_G5,4, NOTE_E5,4, NOTE_F5,2, REST,4 };

// sizeof gives the number of bytes, each int value is composed of two bytes (16 bits) // there are two values per note (pitch and duration), so for each note there are four bytes int notes = sizeof(melody) / sizeof(melody[0]) / 2;

// this calculates the duration of a whole note in ms int wholenote = (60000 * 4) / tempo;

int divider = 0, noteDuration = 0;

void setup() { // iterate over the notes of the melody. // Remember, the array is twice the number of notes (notes + durations) for (int thisNote = 0; thisNote < notes * 2; thisNote = thisNote + 2) {

// calculates the duration of each note
divider = melody[thisNote + 1];
if (divider > 0) {
  // regular note, just proceed
  noteDuration = (wholenote) / divider;
} else if (divider < 0) {
  // dotted notes are represented with negative durations!!
  noteDuration = (wholenote) / abs(divider);
  noteDuration *= 1.5; // increases the duration in half for dotted notes
}

// we only play the note for 90% of the duration, leaving 10% as a pause
tone(buzzer, melody[thisNote], noteDuration * 0.9);

// Wait for the specief duration before playing the next note.
delay(noteDuration);

// stop the waveform generation before the next note.
noTone(buzzer);

} }

void loop() { // no need to repeat the melody. }