Published January 15, 2023

Wireless distance measurement using ultrasonic sensor

Using ultrasonic sensors to measure distance and display the result on an LCD.

IntermediateFull instructions provided674

Wireless distance measurement using ultrasonic sensor

Things used in this project

Hardware components

Arduino UNO

Rotary potentiometer (generic)

Breadboard (generic)

Ultrasonic Sensor - HC-SR04 (Generic)

RGB LCD Shield Kit, 16x2 Character Display

Arduino UNO

Jumper wires (generic)

Alphanumeric LCD, 16 x 2

Breadboard (generic)

Software apps and online services

Arduino IDE

Story

INTRODUCTION:

The distance measurement project is a very helpful project, which can be used in cars to avoid accidents, or in any distance monitoring systems in the industry, and also can be used in liquid level indicators like fuel tanks in planes.

There are also many more examples of robots that work in this principle we want them to activate mechanisms when something or someone gets close to them or sends a message according to the distance, the most common use of this sensor ( ultrasonic sensor) is in the car garage.

One of the simplest, cheapest, and most accurate ways to measure distances is by using ultrasonic sensors. Their working principle is based on the fact that sound is reflected upon most objects and materials. These sensors have a transmitter that sends a short ultrasonic burst and a receiver that senses the ultrasound upon its return. Knowing the speed of the sound in the air (approximately 343 m/sec), we can calculate the distance it traveled, if we measure the time passed for the ultrasound to return to the sensor.

WORKING PRINCIPLE:

ULTRASONIC SENSOR :

Ultrasonic sensors work by

emitting sound waves at a frequency too high for humans to hear

. They then wait for the sound to be reflected back, calculating distance based on the time required. This is similar to how radar measures the time it takes a radio wave to return after hitting an object.

If you need to measure the specific distance from your sensor, this can be calculated based on this formula:

Distance = ½ T x C

(T = Time and C = the speed of sound).

From wameedh Scientific club

and this picture shows the simplest code of this sensor :

From wameedh Scientific club

LCD display :

also called liquid crystal display:

A liquid crystal display (LCD) has liquid crystal material sandwiched between two sheets of glass.

Without any voltage applied between transparent electrodes, liquid crystal molecules are aligned in parallel with the glass surface.

Connecting the Sensor to Arduino and :

ULTRASONIC:

Step1: VCC, that is connected to 5V.
Step2: GND, that is connected to Ground,
Step3: TRIG (Trigger), that is connected to the transmitter to send the ultrasonic burst,
Step4: ECHO, that is connected to the receiver.

There are two ways to connect the sensor to Arduino:

Connect TRIG and ECHO to different digital pins and make all the hard work and calculations in our program,
Connect TRIG and ECHO to the same digital pin and use a library to make all the calculations.

LCD DISPLAY:

To wire your LCD screen to your board, connect the following pins:

LCD RS pin to digital pin 12
LCD Enable pin to digital pin 11
LCD D4 pin to digital pin 5
LCD D5 pin to digital pin 4
LCD D6 pin to digital pin 3
LCD D7 pin to digital pin 2
LCD R/W pin to GND
LCD VSS pin to GND
LCD VCC pin to 5V
LCD LED+ to 5V through a 220 ohm resistor
LCD LED- to GND

REMARK:

I could have used the I2C module to avoid this 11 pins into 4 pins but I wanted to show the real principe working of an LCD.

THIS VIDEO SHOWS THE FINAL RESULT..

DONT FORGT TO SUBSECRIBE SUCH THAT YOU WILL LEARN MORE ABOUT ROBOTICS

Schematics

Code

The code of this project is shown below

#include <LiquidCrystal.h> // including the librery

// identifing the pins 

int rs=7;
int en=8;
int d4=9;
int d5=10;
int d6=11;
int d7=12;
int distance;
LiquidCrystal lcd(rs,en,d4,d5,d6,d7);

int tpin=2;
int epin=3;
double ptt;

int sval;
 

void setup() {
lcd.begin(16,2); //16,2 is a fix numbers shows the speed of an lcd 
pinMode(tpin,OUTPUT);
pinMode(epin,INPUT);
pinMode(spin,INPUT);

  
Serial.begin(9600);
}

void loop() {

lcd.setCursor(0,0); // controlling the lone and the columb of lcd





while(sval)
{
digitalWrite(tpin,LOW);
delay(2);
digitalWrite(tpin,HIGH);
delay(10);
digitalWrite(tpin,LOW);
ptt=pulseIn(epin,HIGH);

distance= 0.034*ptt/2;
lcd.print(distance); // printing the distance 

delay(50);



}
}

Credits

akssil-ga

5 projects • 5 followers

wameedh scientific club

Wireless distance measurement using ultrasonic sensor

Things used in this project

Hardware components

Software apps and online services

Story

INTRODUCTION:

WORKING PRINCIPLE:

Connecting the Sensor to Arduino and :

Custom parts and enclosures

The code of this project is shown below

Schematics

The circuit diagram

Code

The code of this project is shown below

Credits

akssil-ga

Comments

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Wireless distance measurement using ultrasonic sensor

Wireless distance measurement using ultrasonic sensor

Things used in this project

Hardware components

Software apps and online services

Story

INTRODUCTION:

WORKING PRINCIPLE:

Connecting the Sensor to Arduino and :

Custom parts and enclosures

The code of this project is shown below

Schematics

The circuit diagram

Code

The code of this project is shown below

Credits

akssil-ga

Comments

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