Arduino nano 購入記念 2/2

前回の続き。

Arduino nano 購入記念 1/2

2019.12.11

一緒に購入した小さくて取り回しのいいスピーカーを鳴らす。

Mini Oval Speaker – 8 Ohm 1 Watt

https://shop.pimoroni.com/products/mini-oval-speaker-8-ohm-1-watt

スケッチは、Arduinoのサンプルを利用した。

画像のように、GND と PIN8(D8) に配線すると、

ドソソラソ　シド というがっかり感のある曲が再生される

Build-in Example – 02.Digital – toneMelody

/*
  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.
}