Created September 18, 2019

Ultrasonic Distance Sensor Using Arduino

We are going to use the HC-SR04 ultrasonic sensor which enables your robots to avoid obstacles and will move in different directions.

Intermediate42

Ultrasonic Distance Sensor Using Arduino

Things used in this project

Hardware components

Arduino UNO

Ultrasonic Sensor - HC-SR04 (Generic)

9V battery (generic)

connecting wires

Adafruit RGB Backlight LCD - 16x2

Software apps and online services

Arduino IDE

Story

Ultrasonic sensors are useful tools to measure distance without actual contact and utilized at various places like distance measurement, water level measurement, etc. This is an effective way to measure small distances accurately.

In this project, we have used an Ultrasonic Sensor to determine the distance of an obstacle from the sensor and then the device will display it on a screen.

Ultrasonic sensor HC-SR04 is utilized here to measure distance within the range of 2cm-400cm with an accuracy of 3mm. The sensor module includes an ultrasonic transmitter, receiver and control circuit.

In-circuit connections Ultrasonic sensor module’s “trigger” and “echo” pins are directly attached to pin 18(A4) and 19(A5) of Arduino. A 16x2 LCD with I2C is connected with Arduino in 4-bit mode. Control pins RS, RW and En are attached directly to Arduino pin 2, GND and 3. And data pin D4-D7 is connected to 4, 5, 6 and 7 of Arduino.

First of all, it is necessary to trigger the ultrasonic sensor module to transfer signals by using Arduino and then wait to receive ECHO. Arduino reads the time between triggering and Received ECHO. A 16x2 LCD is generally used for displaying distance.

so we can evaluate the distance by using the following formula:

Distance= (time/2) * speed of sound

Where speed of sound around 340m per second.

Learn more about Arduino and other IoT devices on IoT Training which will help you to build customized IoT Solutions

Run a program

#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);
 lcd.clear();
 lcd.print(" Circuit Digest");
 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);
}

Credits

hIOTron

78 projects • 2 followers

hIOTron is an internet of things based company that offers an IoT Platform, products, IoT Solutions, and IoT Training.

Ultrasonic Distance Sensor Using Arduino

Things used in this project

Hardware components

Software apps and online services

Story

Code

Run a program

Credits

hIOTron

Comments

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Ultrasonic Distance Sensor Using Arduino

Ultrasonic Distance Sensor Using Arduino

Things used in this project

Hardware components

Software apps and online services

Story

Code

Run a program

Credits

hIOTron

Comments

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