COIN BASED MOBILE CHARGING SYSTEM

Abstract

The usage of mobile phones has been increased a
lot in last few decades. In this generation mobile phones have
become a part of life. When we are in public places all of sudden
our mobile battery gets drain off at that situation, we don’t have
an alternative to charge phone. This project aims to develop a
smart mobile charging system that can be used in public places.
The system consists of a coin recognition module, Arduino, a
power supply section, and an LCD display. When a user inserts a
coin, the coin acceptor module recognizes whether the coin is
valid or not. If a valid coin is detected, it signals the Arduino to
start the mobile charging mechanism, providing a 5V supply to
the mobile phone. The Arduino also starts a reverse countdown
timer to display the charging time on the LCD screen. If the user
inserts another coin within the remaining charging time, the
microcontroller adds the time to the currently remaining
charging time and starts the reverse countdown again. This
project provides a simple, efficient, and secure way for people to
charge their mobile phones in public places.