//Park Sensörü yapımı
#define buzzer 13
#define ec 9
#define tr 8
int sure;
int maxRange=50;
int minRange=0;
void setup() {
  // put your setup code here, to run once:
pinMode(buzzer, OUTPUT);
pinMode(ec, INPUT);
pinMode(tr, OUTPUT);
Serial.begin(9600);
}


void loop() {
int olcum = mesafe(maxRange, minRange);
melodi(olcum *10 );

}
int mesafe(int maxrange, int minrange){
  long duration, distance;
  digitalWrite(tr, LOW);
  delayMicroseconds(2);
  digitalWrite(tr, HIGH);
  delayMicroseconds(10);
  digitalWrite(tr, LOW);

  duration = pulseIn(ec, HIGH);
  distance = duration /58.2;
  delay(50);

  if(distance >= maxrange || distance <= minrange)
  return 0;
  return distance;
}
int melodi(int dly){
  tone(buzzer, 440);
  delay(dly);
  noTone(buzzer);
  delay(dly);
}