#include "pitches.h"
      
      // notes in the melody:
      int melody[] = {
      NOTE_C4, NOTE_G3,NOTE_G3, NOTE_GS3, 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 
      };
      void setup() {
         // iterate over the notes of the melody:
         for (int thisNote = 0; thisNote < 8; 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 = 1000/noteDurations[thisNote];
            tone(8, melody[thisNote],noteDuration);
            //pause for the note's duration plus 30 ms:
            delay(noteDuration +30);
         }
      }
      void loop() {
         // no need to repeat the melody.
      }
      

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      Arduino - Tone Library

      uno
      arduino

      we will use the Arduino Tone Library. It is nothing but an Arduino Library, which produces square-wave of a specified frequency (and 50% duty cycle) on any Arduino pin. A duration can optionally be specified, otherwise the wave continues until the stop() function is called. The pin can be connected to a piezo buzzer or a speaker to play the tones.

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