In this post, I’ve tried to generate tones with Arduino board.

Using Arduino Uno and an 8 ohm speaker, you can easily generate tones and sounds.

This Arduino sketch uses Tone function to generate sounds.

The circuit is very simple,

Connect Arduino Uno to speaker on pin 8.

Code

/*
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.

http://www.arduino.cc/en/Tutorial/Tone
*/

#include "pitches.h"

// notes in the melody:
int melody[] = {
NOTE_C4, NOTE_G3, NOTE_G3, NOTE_A3, 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);

  // 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.
}

Upload the sketch and run it.

To repeat the tone press Reset button on Arduino board.

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