Grove - Buzzer

Grove - Buzzer

The Grove - Buzzer module has a piezo buzzer as the main component. 

The piezo can be connected to digital outputs, and will emit a tone when the output is HIGH. 

Alternatively, it can be connected to an analog pulse-width modulation output to generate various tones and effects.

Hardware Required

- Intel® Edison Module

- Arduino* expansion board

- Grove Base Shield v2

- Grove Buzzer

Circuit

Schematic

Code 

Example Noize

/*

   Project Four - Noise maker

*/

const int buzzerPin =  6;      // the number of the LED pin

void setup()

{

  pinMode(buzzerPin, OUTPUT);

}

void loop()

{

  digitalWrite(buzzerPin, HIGH);

  delay(analogRead(0));

  digitalWrite(buzzerPin, LOW);

  delay(analogRead(0));

}

Example Melody

/* Melody

 * (cleft) 2005 D. Cuartielles for K3

 *

 * This example uses a piezo speaker to play melodies.  It sends

 * a square wave of the appropriate frequency to the piezo, generating

 * the corresponding tone.

 *

 * The calculation of the tones is made following the mathematical

 * operation:

 *

 *       timeHigh = period / 2 = 1 / (2 * toneFrequency)

 *

 * where the different tones are described as in the table:

 *

 * note  frequency  period  timeHigh

 * c          261 Hz          3830  1915  

 * d          294 Hz          3400  1700  

 * e          329 Hz          3038  1519  

 * f          349 Hz          2864  1432  

 * g          392 Hz          2550  1275  

 * a          440 Hz          2272  1136  

 * b          493 Hz          2028 1014 

 * C         523 Hz         1912  956

 *

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

 */

  

int speakerPin = 6;

int length = 15; // the number of notes

char notes[] = "ccggaagffeeddc "; // a space represents a rest

int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };

int tempo = 300;

void playTone(int tone, int duration) {

  for (long i = 0; i < duration * 1000L; i += tone * 2) {

    digitalWrite(speakerPin, HIGH);

    delayMicroseconds(tone);

    digitalWrite(speakerPin, LOW);

    delayMicroseconds(tone);

  }

}

void playNote(char note, int duration) {

  char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };

  int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };

  

  // play the tone corresponding to the note name

  for (int i = 0; i < 8; i++) {

    if (names[i] == note) {

      playTone(tones[i], duration);

    }

  }

}

void setup() 

{

  pinMode(speakerPin, OUTPUT);

}

void loop() {

  for (int i = 0; i < length; i++) {

    if (notes[i] == ' ') 

{

      delay(beats[i] * tempo); // rest

    } 

else 

{

      playNote(notes[i], beats[i] * tempo);

    }

    

    // pause between notes

    delay(tempo / 2); 

  }

}

See  Also

 

Reference sites