Finger Print Based ATM and locker system

weedyhospitalΗλεκτρονική - Συσκευές

25 Νοε 2013 (πριν από 4 χρόνια και 5 μήνες)

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Finger Print Based ATM and locker system

Description:

An embedded system is a special
-
purpose system in which the computer is completely encapsulated by or
dedicated to the device or system it controls. Unlike a general
-
purpose computer, such as a
personal computer,
an embedded system performs one or a few pre
-
defined tasks, usually with very specific requirements. Since the
system is dedicated to specific tasks, design engineers can optimize it, reducing the size and cost of the product.
Embedded s
ystems are often mass
-
produced, benefiting from economies of scale.



Biometrics:



What is Biometrics?


The study of automated identification, by use of physical or behavioral traits.



Physical vs. Behavioral:




Physical





Fingerprint




Iris





Ear




Face




Retina




Hands



Behavioral




Signature




Walking gait




Typing patterns



Both




Voice



Why go for Biometrics?



. Authentication


the process of verifying that a user requesting a network resource is who he, she, or it claims to
be,
and vice versa.


.
Conventional authentication methods


• something that you have


key, magnetic card or smartcard


• something that you know


PIN or password


.
Biometric authentication uses personal features


• something that you are



Advantages:



Bi
ometrics has no risk of



• Forgetting it


• Loosing it


• Getting it stolen


• Getting it copied


• Being used by anyone else.



Essential Properties of a Biometric



• Universal




Everyone should have the characteristic


• Uniqueness




No two persons
have the same characteristic


• Permanence




Characteristic should be unchangeable


• Collectability




Characteristic must be measurable



Pattern Recognition



• Description and classification of measurements taken from physical or mental processes


• E
xamination of pattern characteristics



• Formulation of the recognition system


• Important part of any biometric system



Why Fingerprint biometry?



. High Universality


. A majority of the population (>96%) have legible fingerprints


. More than the number of people who possess passports, license and IDs



. High Distinctiveness


. Even identical twins have different fingerprints (most biometrics fail)


. Individuality of fingerprints established through empirical evidence


. High Perm
anence


. Fingerprints are formed in the fetal stage and remain structurally unchanged through out life.


. High Performance


. One of the most accurate forms of biometrics available


. Best trade off between convenience and security


. High Acceptability


. Fingerprint acquisition is non intrusive. Requires no training.




Advantages:



• Uniqueness


• Surety over the Cards and Keypads


• Against to Cards Duplication, misplacement and improper disclosure of password


• No excuses for RF/Magnetic Cards forg
et ness


• No need to further invest on the Cards Cost


• No need to further manage the Cards Writing Devices



Fingerprint Patterns



• Loops




Ridge lines enter from one side and curve around to exit from the same side




60
-
65% of population


• Whorls




Rounded or circular ridge pattern




30
-
35% of population


• Arches




Ridge lines enter from one side of print and exit out the other




5% of population



POWER SUPPLY



A variable regulated power supply, also called a variable bench power supply, is
one where you can continuously
adjust the output voltage to your requirements. Varying the output of the power supply is the recommended way
to test a project after having double checked parts placement against circuit drawings and the parts placement
guid
e. This type of regulation is ideal for having a simple variable bench power supply. Actually this is quite
important because one of the first projects a hobbyist should undertake is the construction of a variable regulated
power supply. While a dedicated
supply is quite handy e.g. 5V or 12V, it's much handier to have a variable supply
on hand, especially for testing. Most digital logic circuits and processors need a 5 volt power supply. To use
these parts we need to build a regulated 5 volt source. Usually

you start with an unregulated power supply
ranging from 9 volts to 24 volts DC (A 12 volt power supply is included with the Beginner Kit and the
Microcontroller Beginner Kit.). To make a 5 volt power supply, we use a LM7805 voltage regulator IC.


The LM78
05 is simple to use. You simply connect the positive lead of your unregulated DC power supply
(anything from 9VDC to 24VDC) to the Input pin, connect the negative lead to the Common pin and then when
you turn on the power, you get a 5 volt supply from the
Output pin.



Finger Print Scanner:



A fingerprint sensor is an electronic device used to capture a digital image of the fingerprint pattern. The captured
image is called a live scan. This live scan is digitally processed to create a biometric template (a

collection of
extracted features) which is stored and used for matching.


It supports wide range of fingerprint sensor interoperability giving you a freedom to select suitable sensor that
most fits to your application. Furthermore, the fingerprint data fo
r enrollment and verification are compatible
among different sensors, even if they are based on different technologies. This feature of unification presents
application manufacturers and system integrators with much more flexibility than ever before.



MAX
-

232



To allow compatibility among data communication equipment made by various manufactures, an interfacing
standard called RS232 was set by the Electronic Industries Association (EIA).This RS
-
232 standard is used in
PCs and numerous types of equipment
.However, since the standard was set long before the advent of the TTL
logic family, its input and output voltage levels are not TTL compatible. In RS
-
232 ,a 1 is represented by
-
3 to
-
25V,while a 0 bit is +3 to +25V,making
-
3 to +3 undefined. For this rea
son, to connect any RS
-
232 to a
microcontroller system we must use voltage converters such as MAX232 to convert the TTL logic levels to the
RS
-
232 voltage levels and vice versa.


So here we are using this MAX
-
232 to have compatibility between the Finger Pr
int Scanner and microcontroller.



Microcontroller:



A Micro controller consists of a powerful CPU tightly coupled with memory RAM, ROM or EPROM), various I / O
features such as Serial ports, Parallel Ports, Timer/Counters, Interrupt Controller, Data Acqu
isition interfaces
-
Analog to Digital Converter (ADC), Digital to Analog Converter (ADC), everything integrated onto a single Silicon
Chip.


It does not mean that any micro controller should have all the above said features on chip, Depending on the
need an
d area of application for which it is designed, The ON
-
CHIP features present in it may or may not include
all the individual section said above.


Any microcomputer system requires memory to store a sequence of instructions making up a program, parallel
por
t or serial port for communicating with an external system, timer / counter for control purposes like generating
time delays, Baud rate for the serial port, apart from the controlling unit called the Central Processing Unit



KEYPAD:



In this project we
are using two types of keypads, one is the matrix keypad and the other is the normal key for
selecting the mode of operation.


Here we are doing all the transactions regarding bank like deposit, withdraw, etc. for this transactions and for
entering the pas
sword we are using the 4X4 Matrix keypad.


Using the normal keypad we are going to select the mode which we are going to perform.



LCD:



This is the widely used output device to indicate the status. Here the transaction details are clearly displayed on
t
he LCD.



Buzzer:



This is the output device which we are using to indicate the unauthorized person.



LOCKER SYSTEM:



Here we are demonstrating a DC motor as the Locker for the authorized persons in the Locker system mode.



EEPROM:



This is the additi
onal memory which we are using for the storage of the data for a particular person.