Beep Piezo Buzzer in Certain Invervals With Arduino Uno and Tone() Library.

This instruction is aimed to make you understand how a Piezo Buzzer works with an Arduino Uno. The result should be some varies tone generated by Arduino within defined intervals and goes to Piezo Buzzer.

Step 1: Materials

1. Piezo Buzzer

2. Two (2) jumper wires

Step 2: Wiring

1. Connect "+" Pin of Piezo Buzzer to Pin 8 of Arduino Uno

2. Connect "-" Pin of Piezo Buzzer to Pin GND of Arduino Uni

Step 3: Programming

const int buzzerPin = 8; //Where your '+' of Buzzer goes to
const int freq1 = 220; //Low Note A
const int freq2 = freq1 * 2; //Med
const int freq3 = freq1 * 3; //Hi
const int freq4 = freq1 * 4; //Very Hi
boolean play = true;
void setup() {
  pinMode(buzzerPin, OUTPUT);
}
void loop() {
  if (play == true) {
    makeBeep(1, 1, freq1); // Desc: in 1 second ahead beep an "A" note in 1 second length
    makeBeep(5, 1, freq1);
    makeBeep(5, 1, freq2);
    makeBeep(1, 1, freq3);
    makeBeep(1, 5, freq4);
    }
    play = false; //uncomment if you want to play over and over
}
void makeBeep(int intervalSeconds, int howlongSeconds, int freq) {
  delay(intervalSeconds * 1000);
  tone(buzzerPin, freq, howlongSeconds * 1000);
}