About the Project

This project measures a person’s height using an ultrasonic sensor.

The ultrasonic sensor is fixed at a height of 200 cm from the floor and faces downward. When a person stands below the sensor, it measures the distance from the sensor to the person’s head.

Then Arduino calculates the height using this formula:

Human Height = Sensor Fixed Height - Distance from Sensor to Head

Example:

Sensor fixed height = 200 cm
Distance from sensor to head = 45 cm

Human height = 200 - 45 = 155 cm

This project helps students learn:

How ultrasonic sensor measures distance
How to use sensor values in calculation
How Arduino can measure real-world objects
Basic formula-based automation

It is a useful project for learning distance measurement, height calculation, and sensor-based projects.

Components Required

Arduino Nano / Uno – 1
Ultrasonic Sensor HC-SR04 – 1
Breadboard – 1
Jumper Wires
USB Cable
Measuring tape / scale