Ultrasonic Measuring Device:
(for information on this sensor, click
Things needed:-
1) Arduino
2) Ultrasonic Sensor(in this project HC SR04 model is used)
Connections:-
There are 4 pins on this Ultrasonic sensor.
Connect VCC to arduino 5V
GND to arduino GND
ECHO to arduino pin 12
TRIGGER to arduino pin 13
[Note:- These sensor pins arrangement is for HC SR04 model. The pins may vary for some models.]
Coding:-
/*
HC-SR04 Ping distance sensor]
VCC to arduino 5v GND to arduino GND
Echo to Arduino pin 13 Trig to Arduino pin 12
More info at: http://inlovetech.ucoz.com
*/
#define trigPin 13
#define echoPin 12
void setup() {
Serial.begin (9600);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}
void loop() {
long duration, distance;
digitalWrite(trigPin, LOW); // Added this line
delayMicroseconds(2); // Added this line
digitalWrite(trigPin, HIGH);
// delayMicroseconds(1000); - Removed this line
delayMicroseconds(10); // Added this line
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
if (distance >= 200 || distance <= 0){
Serial.println("Out of range");
}
else {
Serial.print(distance);
Serial.println(" cm");
}
delay(500);
}
