Episode 3 -Piezo Sounder Alarm

 

Komponen 

// Project 11 - Piezo Sounder Alarm

float sinVal;

int toneVal;

void setup() {

 pinMode(8, OUTPUT);

}

void loop() {

 for (int x=0; x<180; x++) {

 // convert degrees to radians then obtain sin value

 sinVal = (sin(x*(3.1412/180)));

// generate a frequency from the sin value

 toneVal = 2000+(int(sinVal*1000));

 tone(8, toneVal);

 delay(2);

 }

}