arduino based distance sensor using arduino

Here  is a simple tutorial to build a Distance sensor which will show the distance from the distance sensor HC-SR04 ( Or any other compatible devices) to the wall or obstacles in front of the sensor in CentiMeters.

This project uses a HCR-SR04 distance sensor and atmega 328 or any other atmega chip which is programmed using a arduino programming kit, SO the project is based on arduino. But our final Circuit will be a standalone circuit without attached arduino programmer.

arduino based distance sensor

Hardware Used:

It is a simple Ultrasonic ranging module.

With Specifications:power supply :5V DC
quiescent current : <2mA
effectual angle: <15°
ranging distance : 2cm – 500 cm

sequence chart

We can send a short ultrasonic pulse at t1 , and if any obstacles is there the received ultrasonic signal is converted to an electrical signal as Echo.  If a 10μs width trigger pulse is sent to the signal pin, the Ultrasonic module will  output eight 40kHz ultrasonic signal and detect the echo back. The measured distance is proportional to the echo pulse width and can be calculated by the formula above. If no obstacle is detected, the output pin will give a 38ms high level signal.

2> Arduino

Either a Arduino Board or a Arduino IC( Atmgea 328 , Atmega 128 , Atmega 8 etc ) with a programmer is used. To know more about Arduino visit the official arduino site

3> 16*2 LCD

arduino based distance sensor


SO If you are going to use arduino board then please connect devices as following:


* 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 ground
* 10Komhs Variable resistor   with two ends to +5v and ground and the middle wipper ti LCD pin VO.

For more detail: arduino based distance sensor

About The Author

Ibrar Ayyub

I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.

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