Small Passive buzzer module (KY-006) [D023]
VIDEO
https://www.youtube.com/watch?v=ASjVjjn9aGs
* GitHub : https://github.com/rdiot/rdiot-d023.git
* Specs
Buzzer: The Buzzer is an integrated electronic Xiangqi structure, with a DC power supply, widely used in computers, printers, photocopiers, alarms, electronic toys, automotive electronics, telephones, timers, etc. electronic products for sound devices.
Buzzer Category: divided into piezoelectric buzzer and magnetic buzzer
Buzzer circuit pattern symbol: buzzer in the circuit by the letter "H" or "HA" (the old standard with the "FM", "LB", "JD", etc.) respectively.
* Contents
- Connect
S ----- D2
middle ----- 5V
- ----- GND
- Key Code
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4); // LCD2004
int S = 2 ;// connect the I/O pin on the buzzer to this
// TONES ==========================================
// Start by defining the relationship between
// note, period, & frequency.
#define m_c 3830 // 261 Hz
#define d 3400 // 294 Hz
#define e 3038 // 329 Hz
#define f 2864 // 349 Hz
#define g 2550 // 392 Hz
#define a 2272 // 440 Hz
#define b 2028 // 493 Hz
#define C 1912 // 523 Hz
// Define a special note, 'R', to represent a rest
#define R 0
// MELODY and TIMING =======================================
// melody[] is an array of notes, accompanied by beats[],
// which sets each note's relative length (higher #, longer note)
int melody[] = { g, g, a, a, g, g, e, g, g, e, e, d };
int beats[] = { 16, 16, 16, 16, 8, 8, 32, 16, 16, 8, 8, 16 };
int MAX_COUNT = sizeof(melody) / 2; // Melody length, for looping.
// Set overall tempo
long tempo = 40000; //10000
// Set length of pause between notes
int pause = 1000; //1000
// Loop variable to increase Rest length
int rest_count = 100; //<-BLETCHEROUS HACK; See NOTES
// Initialize core variables
int tone_ = 0;
int beat = 0;
long duration = 0;
// PLAY TONE ==============================================
// Pulse the speaker to play a tone for a particular duration
void playTone() {
long elapsed_time = 0;
if (tone_ > 0) { // if this isn't a Rest beat, while the tone has
// played less long than 'duration', pulse speaker HIGH and LOW
while (elapsed_time < duration) {
digitalWrite(S, HIGH);
delayMicroseconds(tone_ / 2);
// DOWN
digitalWrite(S, LOW);
delayMicroseconds(tone_ / 2);
// Keep track of how long we pulsed
elapsed_time += (tone_);
}
}
else { // Rest beat; loop times delay
for (int j = 0; j < rest_count; j++) { // See NOTE on rest_count
delayMicroseconds(duration);
}
}
}
void setup()
{
lcd.init(); // initialize the lcd
lcd.backlight();
lcd.print("start LCD2004");
pinMode(S, OUTPUT);
delay(1000);
lcd.clear();
}
void loop()
{
lcd.setCursor(0,0);
lcd.print("D023:KY006PassiveBuz");
for (int i = 0; i<MAX_COUNT; i++) {
tone_ = melody[i];
beat = beats[i];
duration = beat * tempo; // Set up timing
lcd.setCursor(0,1);
lcd.print("melody[" + (String)i + "] = " + (String)tone_ + " ");
lcd.setCursor(0,2);
lcd.print("beat[" + (String)i + "] = " + (String)beat + " ");
lcd.setCursor(0,3);
lcd.print("durati[" + (String)i + "] = " + (String)duration + " ");
playTone();
// A pause between notes...
delayMicroseconds(pause);
}
}
