Simple Radar System Using Arduino and Ultrasonic Sensor

Simple Radar System Using Arduino and Ultrasonic Sensor

https://youtu.be/f-yGhTxBH-g

Program:

#define trigPin 10
#define echoPin 13
#define ledred 7
#define ledgreen 6


float duration, distance;

void setup() {
  Serial.begin (9600);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(ledred, OUTPUT);
  pinMode(ledgreen, OUTPUT);
}

void loop() {
 

  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
 
   duration = pulseIn(echoPin, HIGH);

      distance = (duration / 2) * 0.0343;
 
  Serial.print("Distance = ");
  if (distance >= 400 || distance <= 2) {
     Serial.println("Out of range");
     Serial.print(distance);
  }
  else {
    Serial.print(distance);
    Serial.println(" cm");
    delay(500);
    if (distance <= 15)
    {
      digitalWrite(ledgreen, LOW);
      digitalWrite(ledred, HIGH);
      delay(2000);                     
      digitalWrite(ledred, LOW);   
      delay(2000);                     
    }
    else
    {
      digitalWrite(ledred, LOW);
      digitalWrite(ledgreen, HIGH); 
      delay(2000);                     
      digitalWrite(ledgreen, LOW);   
      delay(2000);
    }
  }
  delay(500);
}