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Coin Operted Mobile Phone

The document outlines a project for a coin-operated mobile charger using the AT89S52 microcontroller, aimed at providing charging services in public places. It describes the system's components, including an IR sensor for coin detection and the ability to switch between charging and water filling. The project emphasizes its advantages such as simplicity, cost-effectiveness, and low power consumption.

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Nikhith Reddy
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75 views4 pages

Coin Operted Mobile Phone

The document outlines a project for a coin-operated mobile charger using the AT89S52 microcontroller, aimed at providing charging services in public places. It describes the system's components, including an IR sensor for coin detection and the ability to switch between charging and water filling. The project emphasizes its advantages such as simplicity, cost-effectiveness, and low power consumption.

Uploaded by

Nikhith Reddy
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
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COIN OPERATED MOBILE CHARGER USING AT89S52

MICROCONTROLLER

ABSTRACT

Introduction:

With mobile phones becoming the major source of business/personal


communication, the mobile phone business is currently worth billion of dollars, and
supports millions of phones. The need to provide a public charging service is essential.
Many critics argued that a public mobile phone charging service is not a lucrative
business because most users can charge their phones at home, in their office or in their
cars. The objective of this project is inserting the coin using charge for your mobile
phone in public places.

Scope:
This project is very useful to people who are all using mobile phone without
charging condition in pubic places.

Explanation:
In this project, who are all using mobile phones in outside of home are office
without charging condition. The coin based mobile phone charger is very useful to that
person for using coin to charge for that mobile. The IR (infrared) transmitter is used to
transmit IR signal in the transmitter side. The IR receiver is used to receive the IR signal
in the receiver side. This IR sensor will detects the coin then we need to select the
optional switch either mobile charge or water filling system.
Depending upon the selection of switch certain relay will on to activate charger or
water filling system, then we will use charger to charge for our mobile phone and also to
fill the water. This project uses AT89S52 Microcontroller is used as heart of the project.
This project uses regulated 5V, 500mA power supply. 7805 three terminal voltage
regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify
the ac out put of secondary of 230/12V step down transformer.
BLOCK DIAGRAM :

Contrast
Coin Box
Control

IR SENSOR

16X2 LCD

Switch 1
8052
Micro controller
Switch 2
Driver Relay Mobile
CRT charger

Crystal

Reset
circuit

Step Bridge
down Filter Power supply to all sections
Rectifier Circuit Regulator
T/F
Advantages:

The main merits of this are:

Simple and hand efficient.

Less expensive.

Reduced man power.

Low power consumption.

Application:

The coin based mobile phone charger and water filling system is very useful to
public for using coin to charge for the mobile phone in any places.

Step
down Bridge Filter
T/F Rectifier Circuit Regulator Power supply to all sections

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