noTone()

Description

Stops the generation of a square wave triggered by tone(). Has no effect if no tone is being generated.

Syntax

noTone(pin)

Parameter Values

  • pin: the Arduino pin on which to stop generating the tone

Return Values

  • Nothing

Example

Let's to play "Jingle Bells" song with Arduino.

Hardware Required

1×Arduino UNO or Genuino UNO
1×Piezo Buzzer
1×Breadboard
n×Jumper Wires
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Wiring Diagram

Arduino Piezo Buzzer Wiring Diagram

Image is developed using Fritzing. Click to enlarge image

Arduino Code

/* * Created by ArduinoGetStarted.com * * This example code is in the public domain * * Tutorial page: https://arduinogetstarted.com/reference/notone */ #include "pitches.h" // notes in the melody: 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 }; // note durations: 4 = quarter note, 8 = eighth note, etc, also called tempo: int noteDurations[] = { 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() { // iterate over the notes of the melody: int size = sizeof(noteDurations) / 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 / 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. }

For more detailed instruction, see Arduino - Piezo Buzzer

※ NOTES AND WARNINGS:

If you want to play different pitches on multiple pins, you need to call noTone() on one pin before calling tone() on the next pin.

See Also

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