ELECTRONICS MESURING TAPE

Hello everyone;

I am Amey, welcome to my channel 

Today, I am building another cool project which is Measuring tape with the help of ultrasonic sensor and Arduino. So lets' make it

Components: -

1.     Arduino Uno

2.     ultrasonic sensor (HC-SR04)

3.     16 x 2 lcd

4.     I2C module for LCD (Optional)

5.     Laser

6.     7805

7.     9v Battery

Working: -

This project is really simple. I am using an ultrasonic sensor (HC-SR04) which work on principle of doppler effect

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

Circuit Diagram: -

coding:-

without i2c module

#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(2000);

}
 
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);
}

with i2c module

#include <Wire.h> 

#include <LiquidCrystal_I2C.h>

#define trigger 18

#define echo 19

LiquidCrystal_I2C lcd(0x27, 16, 2);

lcd.begin();

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(2000);

}

 

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);

}

video

https://youtu.be/fQnw5ieuMY8