WK9 : Meera

To celebrate the early  spirit of Christmas, I wanted to make the buzzer play a Christmas tune. The tune plays  by pressing  the button ( switch ). I added , also, a Knob ( potentiometer) to control the volume of the tune. I struggled a lot with the Knob , I thought that the way I connected it was right because I used the example specified for the buzzer and knob but it turned out that their is a different way to connect it when a button is involved. Also the the code was difficult to figure out  but once that was sorted I was finally able to finish this project since connecting the buzzer to the button was very simple and fun to build.

jingle buzzer

Finally I hope you enjoy this project, it was fun to make:

 

 

 

#define buzzer 9
#define button 7

#include "pitches.h"

#define melodyPin 9

// Jingle Bells

int melody[] = {
  NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_G5, NOTE_C5, NOTE_D5,
  NOTE_E5,
  NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5,
  NOTE_F5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_D5, NOTE_D5, NOTE_E5,
  NOTE_D5, NOTE_G5
};

int tempo[] = {
  8, 8, 4,
  8, 8, 4,
  8, 8, 8, 8,
  2,
  8, 8, 8, 8,
  8, 8, 8, 16, 16,
  8, 8, 8, 8,
  4, 4
};




void setup() {// put your setup code here, to run once:
  pinMode ( button, INPUT);

  Serial.begin (9600);
  

}

void loop() {

  if (  digitalRead ( button) == HIGH) {

     Serial.println(" 'Jingle Bells'");
    int size = sizeof(melody) / sizeof(int);
    for (int thisNote = 0; thisNote < size; 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 / tempo[thisNote];

      tone(melodyPin, 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:
      tone (melodyPin, 0, noteDuration);

    }

    int knobValue = analogRead (A0);

    byte pwm = map(knobValue, 0, 1023, 0, 255);
    
    Serial.print ( knobValue);
    Serial.print ( "-");
   
    Serial. println ( pwm);

    
    
     analogWrite( tone, pwm);
   
    
    
    
    delay (1);

  } else {
    noTone (buzzer);
  
}
  
  }