Ultrasonic sensor

Ultrasonic distance measuring

Components:

1-ِArduino

2- Ultrasonic sensor

3-Buzzer

4- wires

Connections:

pin : pin

pin : pin

pin : pin

Code:

// Define the ultrasonic sensor pins
#define trigPin 2
#define echoPin 3

// Define the buzzer pin
#define buzzerPin 4

void setup() {
  // Set the ultrasonic sensor pins as input/output
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);

  // Set the buzzer pin as output
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  // Send a pulse to the ultrasonic sensor to start a distance measurement
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Measure the duration of the pulse from the ultrasonic sensor
  long duration = pulseIn(echoPin, HIGH);

  // Calculate the distance in centimeters
  int distance = duration / 58;

  // Check if the distance is less than 50 centimeters (half a meter)
  if (distance < 50) {
    // Turn on the buzzer
    digitalWrite(buzzerPin, HIGH);
  } else {
    // Turn off the buzzer
    digitalWrite(buzzerPin, LOW);
  }

  // Wait for a short period oftime before taking another measurement
  delay(100);
}