Arduino Projects Ideas - Ultrasonic Distance Meter

 Arduino Projects Ideas - Ultrasonic Distance Meter

Components:
HC-SR04 Ultrasonic sensor
Arduino UNO

Wiring:
VCC → 5V
GND → GND
Trig → Pin 9
Echo → Pin 10

Code:

long duration;
int distance;

void setup() {
  pinMode(9, OUTPUT);
  pinMode(10, INPUT);
  Serial.begin(9600);
}

void loop() {
  digitalWrite(9, LOW);
  delayMicroseconds(2);
  digitalWrite(9, HIGH);
  delayMicroseconds(10);
  digitalWrite(9, LOW);

  duration = pulseIn(10, HIGH);
  distance = duration * 0.034 / 2;
 
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
  delay(500);
}