Human Posture monitoring using Flex Sensor & Arduino “Arduino biomedical project”

(Last Updated On: February 13, 2020)

Human posture monitoring


Human posture monitoring- This Tutorial, is about the Human Posture monitoring using a Flex sensor or Bend sensor and Arduino. Before you watch this tutorial, first I recommend you should watch my previous tutorial on Flex sensor or Bend sensor getting started. This tutorial completely explains all the basics related with the flex sensor.


 As this is my first tutorial on Human Posture Monitoring so I am gonna call this version 1. While in version 2 of Human Posture monitoring I will make use of wireless communication to send the Posture data to the computer application where it can be displayed on a chart for post-analysis.

The components and tools used in this project can be purchased from Amazon, the components Purchase links are given below:

Arduino Uno:
Mega 2560:
Flex sensor with the best price:
5v buzzer:
lm7805 Voltage Regulator:
330-ohm resistors pack:
5v 2A adaptor:
2n2222 NPN transistors:
10k Resistor:
lm7805 Voltage Regulator:
330-ohm resistors pack:
female DC power jack socket:
470uf capacitors:
5×7 cm Vero board:
female headers:
connection wires:
Super Starter kit for Beginners:
Jumper Wires:
Bread Board:
12v Adaptor:
PCB plate:
Variable Supply:
Digital Multimeter:
Vero Board / stripboard:
Soldering iron kit: “best” You guys should definitely purchase this:
Solder wire:
Wire Stripper:
PCB small portable drill machine:


Please Note: these are affiliate links. I may make a commission if you buy the components through these links. I would appreciate your support in this way!

Let’s start with a question

What is the posture?
Posture is not a position, but a dynamic pattern of reflexes, habits, and adaptive responses to anything that resists you being more or less upright and functional.

Human posture monitoring

Forward head and flat back is a poor posture,

Forward head, sway back and rounded shoulders is of course a poor posture.

Human posture monitoring

Poor posture soon results in Sciatica problem.

Sciatica is a term that describes symptoms of pain, numbness, and weakness that radiate along the sciatic nerve from the lower back to the buttocks and leg. Most commonly, sciatica is caused by a disc problem, such as a herniated disc that is pressing against a nerve root.

Human posture monitoring

Circuit Diagram:

Human posture monitoring

The flex sensor connection with Arduino is exactly the same as explained in my previous tutorial. As you can see a10k resistor is connected in series with the flex sensor… A 5v from Arduino is connected with the flex sensor and the ground is connected with the 10k resistor. This flex sensor and 10k resistor make a voltage divider…a wire from the middle is connected with the Analog pin A0 of the Arduino. the buzzer’s  S pin is connected with pin number 5 of the Arduino which is the PWM pin and the minus pin is connected with the ground.


as you know my friends, every Arduino and the mega program has at least two functions, which are the void setup and void loop functions. Void means that this function is not returning any value and the empty parenthesis means that this function is not taking any arguments as the input.

Watch Video Tutorial:

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About the Author: Engr Fahad

My name is Shahzada Fahad and I am an Electrical Engineer. I have been doing Job in UAE as a site engineer in an Electrical Construction Company. Currently, I am running my own YouTube channel "Electronic Clinic", and managing this Website. My Hobbies are * Watching Movies * Music * Martial Arts * Photography * Travelling * Make Sketches and so on...

1 Comment

  1. Hey, a very nice job. And please when is the version 2 of this project going to be ready, I have a project similar to that I will really appreciate your help. Thank you

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