月亮代表我的心

/*
Melody

Plays a melody

circuit:

  • 8 ohm speaker on digital pin 8

created 21 Jan 2010
modified 30 Aug 2011
by Tom Igoe

This example code is in the public domain.

https://www.arduino.cc/en/Tutorial/BuiltInExamples/toneMelody
*/

#include “pitches.h”

// notes in the melody:
int melody[] = {
NOTE_G3, NOTE_C4, NOTE_E4, NOTE_G4, NOTE_C4, NOTE_B3,NOTE_E4, NOTE_G4,NOTE_G4,NOTE_A4,NOTE_B4,NOTE_C5,NOTE_A4,NOTE_G4,
NOTE_E4, NOTE_D4, NOTE_C4, NOTE_C4,NOTE_C4, NOTE_E4, NOTE_D4, NOTE_C4, NOTE_C4,NOTE_C4,
NOTE_D4, NOTE_E4, NOTE_D4, NOTE_A3, NOTE_B3, NOTE_C4, NOTE_D4, NOTE_C4,
};

// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
4, 12, 4, 12, 4, 12, 4, 12, 8,12,4,12,4,16,
4, 4, 12, 4, 8, 4, 4, 12, 4, 8,
4,4,12,4,8,4,4,24,
};
void setup() {
// iterate over the notes of the melody:
for (int thisNote = 0; thisNote < 32; thisNote++) {

// to calculate the note duration, take one second divided by the note type.
//e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
int noteDuration =  noteDurations[thisNote] * 70;
tone(8, melody[thisNote], noteDuration);

// to distinguish the notes, set a minimum time between them.
// the note's duration + 30% seems to work well:
int pauseBetweenNotes = noteDuration * 1.30;
delay(pauseBetweenNotes);
// stop the tone playing:
noTone(8);

}
}

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