Measuring Distance and displaying it on LCD




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How it works?

Hello,
This project is basically, based  on displaying the distance on a LCD display with the help of  an  HC-SRO4 ultrasonic sensor . The HC-SRO4 Ultrasonic distance sensor consist of two Ultrasonic transducers . In which one acts as a Transmitter and other as a Receiver . Transmitter converts electrical signals into 40KHz ultrasonic sound pulses. the receiver listens for the transmitted pulse (when bounces back) .If it receives them it produces an output pulse whose width can be used to determine the distance the pulse travelled .
This sensor offers an excellent range of 2 to 400cm with an accuracy of 3mm . and luckily it operates on 5 volts , so we can directly hooked to an Arduino Uno or any other 5V logic microcontrollers.  

How to connect?

Hello,
In this project I am going to show you how to connect the HC-SRO4 with  an "Arduino Uno" and print the distance on LCD display(16*2)
First of all connect the LCD display with Arduino Uno.
Now connect the HC-SRO4 with Arduino too.

*you can use any digital pin in connection. As per your choice .
*In this project I have used  pins (12, 11, 10, 9, 5, 4, 3, 2).


Connecting LCD with Arduino-:

VSS   pin  to  GND
VDD/VCC  pin to +5volt
VO   pin through  1k resistor to  ground
RS    pin to  Digital pin(12)
RW   pin to  GND
E      pin to   Digital pin(11) 
D4    pin to  Digital pin(5)
D5    pin to  Digital pin(4)
D6    pin to  Digital pin(3)
D7    pin to  Digital pin(2)
A      pin to  +5volt
K      pin to  GND
  

Connecting HC-SRO4 with Arduino-:

VCC            pin to    +5 volts
TRIGGER   pin  to  Digital pin (9)
ECHO         pin  to   Digital pin (10)
GND           pin to     GND

Arduino Code


#include<NewPing.h>
#include<LiquidCrystal.h>
int contrast=0;
LiquidCrystal lcd (12,11,5,4,3,2); //RS, ENABLE, d4, d5, d6, d7

const int trigPin=9;
const int echoPin=10;

long duration;
int distance;


void setup() {


Serial.begin(9600); 
pinMode(trigPin,OUTPUT);
pinMode(echoPin,INPUT);

lcd.begin(16,2);// interface of the lCD display
}



void loop() {
//trigerpin
 digitalWrite(trigPin, LOW);
 delayMicroseconds(2);

 digitalWrite(trigPin, HIGH);
 delayMicroseconds(10);
digitalWrite(trigPin, LOW);

 duration = pulseIn(echoPin, HIGH);// measure the response form the HC-SRO4 Echo Pin
 distance = duration*0.034/2;// use 340 m/s as speed of sound 
 
  
lcd.setCursor(0,0);// prints "Distance" on the first row of lcd
lcd.print("Distance: ");
lcd.print(distance);
lcd.print(" cm");


delay(2000);//delay of 2seconds
}

For any queries contact me on  -:tombriddle28@gmail.com

YouTube Channel-: Omnific{If this post helps you please do subscribe my               
            YouTube channel too ,It's only a click for you but it means a lot to me.}

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