rodeoSiren

rodeoSiren.ino

//Reference: https://www.arduino.cc/en/Tutorial/ToneMelody?from=Tutorial.Tone
#define NOTE_C4  262
#define NOTE_F4  349

#define buzzerPin 3

void setup() {
  pinMode(buzzerPin, OUTPUT);
  pinMode(LED_BUILTIN, OUTPUT);
}

void play(unsigned int freq_Hz, unsigned long duration_ms) {
  tone(buzzerPin, freq_Hz, duration_ms);
  delay(duration_ms*1.10);
}

void loop() {
  digitalWrite(LED_BUILTIN, HIGH);
  play(NOTE_F4, 500);
  digitalWrite(LED_BUILTIN, LOW);
  play(NOTE_C4, 500);
}