Embedded Based Coin Mobile Phone Charger for Public Places

Abstract

This project is developed to control a load through coin box using microcontroller in a prepaid manner. It consists of a Coin box, Microcontroller unit, key pad and a LCD Display. The user can add the validity of their account by inserting coins in the coin box. Their account will be updated according to the number of coins added in the box. The charge value will be displayed in a LCD display. The user can use their mobile to charge up to the displayed limit. If the charge is over, it will be cut automatically. Again if he/she recharged through coins, user can use the charger. The Microcontroller programs are written in assembly language. This will be very useful in industries, houses, institutions etc.

Existing System

Proposed System

Architecture

BLOCK DIAGRAM