Adaptive Screen Brightness using LDR and Python script

Every wondered how useful is the automatic brightness feature on phones, quickly adapting screen’s brightness according to the surrounding light intensity.

In this project I try to create something similar for any PC or Laptop running on Linux(preferably Ubuntu 14.04).
My goal was to keep it cheap and simple as much as possible.
So to make a prototype of it I used LDR to measure light intensity and an arduino communicate with my machine. On my machine I used a python script to communicate over USB with arduino and to edit the file which is responsible for the brightness of screen.

This project cost around Rs 300 just because of microcontroller that is being used(needless to say it’s a prototype).
It has got very high utility specially for PC users.