Distance Measurement Using Ultrasonic Sensor and Arduino

Project Description

In this project, we have used the HC-SR04 Ultrasonic Sensor with Arduino to determine the distance of an obstacle from the sensor. The basic principle of ultrasonic distance measurement is based on ECHO. When sound waves are transmitted in the environment then waves return back to the origin as ECHO after striking on the obstacle. So, we only need to calculate the traveling time of both sounds means outgoing time and returning time to origin after striking on the obstacle. As the speed of the sound is known to us, after some calculation we can calculate the distance. We are going to use this same technique for this Arduino distance measurement project.

Pin Connections

The HC-SR04 sensor attach to the Breadboard

The Sensor VCC connect to the Arduino Board +5V

The Sensor GND connect to the Arduino Board GND

The Sensor Trig connect to the Arduino Board Digital I/O 9

The Sensor Echo connect to the Arduino Board Digital I/O 10

LCD Display Connection

LCD VSS pin to Arduino GND

LCD VDD pin to Arduino 5V

LCD VO pin to 10k Potentiometer center pin

LCD RS pin to digital pin 1

LCD RW pin to Arduino GND

LCD Enable pin to digital pin 2

LCD D4 pin to digital pin 4

LCD D5 pin to digital pin 5

LCD D6 pin to digital pin 6

LCD D7 pin to digital pin 7

The 10k Potentiometer’s other legs connect to +5V and GND

For the backlight of the display, pin 15 (A+) and 16 (K-) of the LCD connect to +5V and GND

Circuit Diagram

Package Include

1. Arduino Uno
2. Uno cable
3. Ultrasonic Sensor
4. 16*2 LCD Display
5. 10K Potentiometer
6. Breadboard
7. Male – Female Jumper Wires
8. 9V battery
9. Battery snapper connector