Published September 15, 2020 © GPL3+

How to make digital distance meter

In this tutorial I will show you how to make digital distance meter with arduino, ultrasonic sensor and lcd display

BeginnerFull instructions provided7,674

Things used in this project

Hardware components

Arduino Nano R3

Ultrasonic Sensor - HC-SR04 (Generic)

Alphanumeric LCD, 16 x 2

Jumper wires (generic)

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Wire Stripper & Cutter, 18-10 AWG / 0.75-4mm² Capacity Wires

Story

Introduction

Ultrasonic distance meter works on a principle similar to radar or sonar which evaluates attribution of a target by interpreting the echoes from radio or sound waves respectively. Ultrasonic sensors generate high frequency sound waves and evaluate the echo which is received back by the sensor. Sensors calculate the time interval between sending the signal and receiving the echo to determine the distance to an object.

About Device

The system consists of only one main component, a microcontroller unit which acts as the brain of the system. Input and output components such as transmitter unit, receiver circuit, temperature control and LCD modules are connected to the system brain.The transmitter generates a 40 kHz signals and begin the transmission time together with the process of sending signals. While the signals begin to transmit through ultrasonic transducer, the microcontroller will capture the starting point of transmission time and hold it until the receiver gets the echo signal back. The signal will contact with any obstacle ahead and will bounce back to the receiver circuit. When the signal is back, the receiver must detect the echo signal, process & send to the microcontroller. The microcontroller will stop the transmission time immediately and will calculate the range using the transmission time and display the range on LCD modules. If the transmit signal cannot touch any obstacle in front it, or the time is very fast, the system will display error message on the LCD modules, indicate the range is not suitable for the system.

Formula used:- (speedofsound*time)/2

Speed of sound = 340m/s

Advantages

• Not affected by color or transparency of objects.

• Can be used in dark environments.

• Low-cost option.

• Not highly affected by dust, dirt, or high-moisture environments.

• They have greater accuracy than many other methods at measuring thickness and distance to a parallel surface.

• Their high frequency, sensitivity, and penetrating power make it easy to detect external or deep objects.

• Our ultrasonic sensors are easy to use and not dangerous during operation to nearby objects, people or equipment.

• Our sensors easily interface with microcontrollers or any type of controller.

Demo video

Plzz like, share, comment, and subscribe.Watch full video for sure that how it works

Project images

Distance measurement

Project images

Circuit Diagram

I hope you all enjoyed my project.

Code

Arduino source code

#include <LiquidCrystal.h>
 
#define trigger 18
#define echo 19
 
LiquidCrystal lcd(2,3,4,5,6,7);
 
float time=0,distance=0;
 
void setup()
{
 lcd.begin(16,2);
 pinMode(trigger,OUTPUT);
 pinMode(echo,INPUT);
 lcd.print(" Ultra Sonic ");
 lcd.setCursor(0,1);
 lcd.print(" Distance Meter ");
 delay(8000);
 lcd.clear();
 lcd.print(" Shashwat__Raj ");
 delay(5000);
}
 
void loop()
{
 lcd.clear();
 digitalWrite(trigger,LOW);
 delayMicroseconds(2);
 digitalWrite(trigger,HIGH);
 delayMicroseconds(10);
 digitalWrite(trigger,LOW);
 delayMicroseconds(2);
 time=pulseIn(echo,HIGH);
 distance=time*340/20000;
 lcd.clear();
 lcd.print("Distance:");
 lcd.print(distance);
 lcd.print("cm");
 lcd.setCursor(0,1);
 lcd.print("Distance:");
 lcd.print(distance/100);
 lcd.print("m");
 delay(1000);
}

Credits

Shashwat Raj

7 projects • 12 followers

My name is Shashwat Raj. I love doing projects with arduino and Raspberry Pi. You want to view more please subscribe to my YouTube Channel.

How to make digital distance meter

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

Circuit Diagram

Code

Arduino source code

Credits

Shashwat Raj

Comments

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How to make digital distance meter

How to make digital distance meter

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

Circuit Diagram

Code

Arduino source code

Credits

Shashwat Raj

Comments

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