Attention : la borne + du buzzer doit être reliée à une broche PWM (exemple 9)
tone( pin number, frequency in hertz, duration in milliseconds);
Exemple d’utilisation d’un Buzzer avec un NE 555 :
Simple Beep :
void setup() {
// declare pin 9 to be an output:
pinMode(9, OUTPUT);
beep(50);
beep(50);
beep(50);
delay(1000);
}
void loop() {
beep(200);
}
void beep(unsigned char delayms){
analogWrite(9, 20); // Almost any value can be used except 0 and 255
// experiment to get the best tone
delay(delayms); // wait for a delayms ms
analogWrite(9, 0); // 0 turns it off
delay(delayms); // wait for a delayms ms
}
Exemple d’utilisation de la fonction Tone() avec un Buzzer Piezzo :
La résistance est de 100 Ohms
/*
Hardware connections:
Connect the positive pin to Arduino digital pin 9.
(Note that this must be a PWM pin.)
Connect the negative pin to GND.
*/
/*
This sketch uses the buzzer to play songs.
The Arduino's tone() command will play notes of a given frequency.
We'll provide a function that takes in note characters (a-g),
and returns the corresponding frequency from this table:
note frequency
c 262 Hz
d 294 Hz
e 330 Hz
f 349 Hz
g 392 Hz
a 440 Hz
b 494 Hz
C 523 Hz
For more information, see http://arduino.cc/en/Tutorial/Tone
*/
const int buzzerPin = 9;
const int songLength = 18;
// Notes is an array of text characters corresponding to the notes
// in your song. A space represents a rest (no tone)
char notes[] = "cdfda ag cdfdg gf "; // a space represents a rest
// Beats is an array of values for each note and rest.
// A "1" represents a quarter-note, 2 a half-note, etc.
// Don't forget that the rests (spaces) need a length as well.
int beats[] = {1,1,1,1,1,1,4,4,2,1,1,1,1,1,1,4,4,2};
// The tempo is how fast to play the song.
// To make the song play faster, decrease this value.
int tempo = 150;
void setup()
{
pinMode(buzzerPin, OUTPUT);
}
void loop()
{
int i, duration;
for (i = 0; i < songLength; i++) // step through the song arrays
{
duration = beats[i] * tempo; // length of note/rest in ms
if (notes[i] == ' ') // is this a rest?
{
delay(duration); // then pause for a moment
}
else // otherwise, play the note
{
tone(buzzerPin, frequency(notes[i]), duration);
delay(duration); // wait for tone to finish
}
delay(tempo/10); // brief pause between notes
}
// We only want to play the song once, so we'll pause forever:
while(true){}
// If you'd like your song to play over and over,
// remove the above statement
}
int frequency(char note)
{
// This function takes a note character (a-g), and returns the
// corresponding frequency in Hz for the tone() function.
int i;
const int numNotes = 8; // number of notes we're storing
// The following arrays hold the note characters and their
// corresponding frequencies. The last "C" note is uppercase
// to separate it from the first lowercase "c". If you want to
// add more notes, you'll need to use unique characters.
// For the "char" (character) type, we put single characters
// in single quotes.
char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
int frequencies[] = {262, 294, 330, 349, 392, 440, 494, 523};
// Now we'll search through the letters in the array, and if
// we find it, we'll return the frequency for that note.
for (i = 0; i < numNotes; i++) // Step through the notes
{
if (names[i] == note) // Is this the one?
{
return(frequencies[i]); // Yes! Return the frequency
}
}
return(0); // We looked through everything and didn't find it,
// but we still need to return a value, so return 0.
}
Voir aussi ROBOTPLAY : https://www.arduino.cc/en/Reference/RobotPlayMelody
Exemples de musique :
http://www.instructables.com/id/How-to-easily-play-music-with-buzzer-on-arduino-Th/
http://www.linuxcircle.com/2013/03/31/playing-mario-bros-tune-with-arduino-and-piezo-buzzer/
Références :
http://makezine.com/projects/miniature-beeping-circuit-prank/
http://jmdefais.pagesperso-orange.fr/techn_jm/cirum66.htm
http://www.mon-club-elec.fr/pmwiki_reference_arduino/pmwiki.php?n=Main.ExempleTone
AndroLogiciels 
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