Adruino Prgramming (Robotics)

Obstruction Sensor using Ultrasonic Sound

Circuit diagram:

Arduino Source Code

long duration;

int distance;

const int buzzer=13,echoPin=2,trigPin=3;

void setup() 

{

  pinMode (buzzer,OUTPUT);

  pinMode (trigPin,OUTPUT);

  pinMode (echoPin,INPUT);

}

void loop() 

{

  int i;

  //Clears the trig pin condition

  digitalWrite(trigPin,LOW);

  delayMicroseconds(2);

  //Set trigpin to high for 10 microseconds

  digitalWrite(trigPin,HIGH);

  delayMicroseconds(10);

  digitalWrite(trigPin,LOW);

  //gets the time taken by the sound wave to travel in echo pin

  duration=pulseIn(echoPin,HIGH);

  distance=duration*0.034/2;

  if (distance<=10)

  {

   for (i=0;i<100 div="" i="">

   {

    digitalWrite(buzzer,HIGH);

    delay(1);

    digitalWrite(buzzer,LOW);

    delay(1);

   }

  }

  

}