/* Lab7 Buzzer 程式碼1*/

/* Buzzer接線方式

+  -->  pin8

-  -->  GND

*/

int buzzerpin = 8;

void setup(){

  pinMode(buzzerpin, OUTPUT);

}

void loop(){

  for(int i=200; i<=800; i=i+1){    //頻率從200HZ增加到800HZ

    tone(buzzerpin, i);

    delay(5);

  }

  delay(3000);

  for(int i=800; i>=200; i=i-1){    //頻率從800HZ減少到200HZ

    tone(buzzerpin, i);

    delay(5);

  }

  delay(3000);

} 

/* Lab7 Buzzer 程式碼2*/

/* Buzzer接線方式

+  -->  pin8

-  -->  GND

*/

int buzzerpin = 8;

int C = 262;

int D = 294;

int E = 330;

int F = 349;

int G = 392;

int A = 440;

int B = 493;

int note[]     = {C,C,G,G,A,A,G,F,F,E,E,D,D,C};    //音調

int duration[] = {1,1,1,1,1,1,2,1,1,1,1,1,1,2};    //節奏

int BetweenNotes;

void setup(){

  pinMode(buzzerpin, OUTPUT);

}

void loop(){

  for (int i=0; i <= 13; i=i+1) {

    tone(buzzerpin, note[i], duration[i]*100);

    BetweenNotes =  duration[i]*200;

    delay(BetweenNotes);

 }

}