HARDWARE REQUIRED

SOFTWARE REQUIRED

Arduino IDE 1.8.5 (Programmable Platform for Arduino Boards)
Click to download the software: https://www.arduino.cc/en/Main/Software

PIN DESCRIPTION

HC SR04 ULTRASONIC SENSOR

**16*2 LCD DISPLAY**

10K POTENTIOMETER

CIRCUIT DESCRIPTION

Connection for LCD 16*2 Display with Arduino uno

*LCD 16 2**	Arduino
VSS	GND
VCC	5V
RS	PIN 11
R/W	PIN 10
E	PIN 9
DB4	PIN 2
DB5	PIN 3
DB6	PIN 4
	PIN 5
LED+ (A)	5V
LED- (K)	GND

Connection for HC SR-04 Ultrasonic Sensor with Arduino UNO

Ultrasonic Sensor	Arduino
VCC	5V
GND	GND
ECHO	Pin 12
TRIG	Pin 13

Connection for the potentiometer with LCD 16*2 and Breadboard

Potentiometer	LCD	Breadboard
Pin 1 (left)		5v
Pin 2(mid)	Pin 3
Pin 3 (right)		Gnd

CODE

Before coding, you have to install new ping library

https://drive.google.com/open?id=11gy_6v61-Eq0sAz8RJF_sn5Tl0g7z8Cj

Sketch > Include library > Manage Library > Search NEWPING library > download it

Or you download NewPing Library from other site.

https://drive.google.com/open?id=107vaWoBXZ8t6xtLExf7GQPetTcTP6glO

HC-SR04 Ultrasonic Sensor with LCD display

HC-SR04 Ultrasonic Sensor

VCC to Arduino 5V

GND to Arduino GND

Echo to Arduino pin 12

Trig to Arduino pin 13

LCD Display –

VSS to Arduino GND

VCC to Arduino 5V

VEE to Arduino GND

RS to Arduino pin 12

R/W to Arduino pin gnd

E to Arduino pin 11

DB4 to Arduino pin 10

DB5 to Arduino pin 9

DB6 to Arduino pin 8

DB7 to Arduino pin 7

LED+ to Arduino 5V

LED- to Arduino GND

#include <LiquidCrystal.h> //Load Liquid Crystal Library

LiquidCrystal LCD(12, 11, 10, 9, 8, 7); //Create Liquid Crystal Object called LCD (rs=12 E=11 D4=10 D5=9 D6=8 D7=7)

//Assigning pins of Arduino board to some variable

#define trigPin 2 //Sensor Echo pin connected to Arduino pin 13

#define echoPin 3 //Sensor Trip pin connected to Arduino pin 12

/* The setup() function is called when a sketch starts. It is used to initialize variables, pin modes,

start using libraries, etc. This function will only run once,

after each power up or reset of the Arduino board. */

void setup(){

pinMode(trigPin, OUTPUT); // OUTPUT means the “trigPin” which is actually pin no 13 is directed to give output instruction form the arduino.

pinMode(echoPin, INPUT); // OUTPUT means the “echoPin” which is actually pin no 12 is directed to give output instruction form the arduino.

LCD.begin(16, 2); //Tell Arduino to start your 16 column 2 row LCD

LCD.setCursor(0, 0); //Set LCD cursor to upper left corner, column 0, row 0

LCD.print(“Target Distance:”); //Print Message on First Row

}

void loop() {

long duration, distance;

digitalWrite(trigPin, LOW); // digitalWrite is used to write a HIGH or a LOW value to a digital pin (LOW is the voltage level).

delayMicroseconds(2);

digitalWrite(trigPin, HIGH); // digitalWrite is used to write a HIGH or a LOW value to a digital pin (HIGH is the voltage level).

delayMicroseconds(10);

digitalWrite(trigPin, LOW); // digitalWrite is used to write a HIGH or a LOW value to a digital pin (LOW is the voltage level).

duration = pulseIn(echoPin, HIGH);

distance = (duration / 2) / 29.1;

LCD.setCursor(0, 1); //Set cursor to first column of second row

LCD.print(” “); //Print blanks to clear the row

LCD.setCursor(0, 1); //Set Cursor again to first column of second row

LCD.print(distance); //Print measured distance

LCD.print(” cm”); //Print your units.

delay(250); //pause to let things settle

}

RUN SKETCH AND VERIFY OUTPUT

After compiling, uploading and running it

As far as the object goes far from the ultra-sonic sensor, Distance will be vary and measured distance will be show in LCD

in the Serial Monitor (Tools -> Serial Monitor or Ctrl + Shift + M) the sensor was sending correct data

Note: Must Set the baud Rate to 115200

Ping: 36 cm or the value shown in the serial monitor depends on the object distance from the ultra-sonic sensor.

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