An embedded system is a combination of hardware and software, designed
for a specific application.
As the only way you’d have access to cash before June 27 1967 was to visit your local bank
when it was open, some would have to travel miles to their nearest town!
SO
The emergence of automated teller machines (ATMs) has revolutionized
banking and changed the way banks interact with their customers. People
began to identify themselves by the bank's brand, rather than by the
individual branch. ATMs enhanced the all-encompassing nature of banking, as
banking services were not tied to a branch or a person, were available 24/7,
and could be accessed through machines, and later through mobile phones
and laptops.
❖ ATM stands for automated teller machine. It is an electronic device that is used by only
bank customers to process account transactions.
❖ (ATM) allows customers to perform banking transactions anywhere and at anytime
without the need of human teller.
❖ By using a debit or ATM card at an ATM, individuals can withdraw cash from checking or
savings accounts, make a deposit or transfer money from one account to another or
perform other functions.
❖ You can also get cash advances using a credit card at an ATM.
consists of mainly two input devices and four output devices.
display
screen
card reader
receipt Output cash
Input devices printer device depositor.
keypad
speaker
keypad card reader
The card reader is an input device that reads
The card is recognized after the machine asks
data from a card. The card reader is part of
for further details like your identification
the identification of your particular account
number, withdrawal, and your balance
number and the magnetic strip on the
inquiry Each card has a unique PIN so that
Input backside of the ATM card is used for
there is little chance for some else to
connection with the card reader. The card is
withdraw money from your account. There devices swiped or pressed on the card reader which
are separate laws to protect the PIN code
captures your account information i.e. the
while sending it to the host processor. The
data from the card is passed on to the host
PIN is mostly sent in encrypted form. The
processor (server). The host processor thus
keyboard contains 48 keys and is interfaced to
uses this data to get the information from the
the processor.
cardholders.
The display screen displays the transaction
information. Each step of withdrawal is
shown by the display screen. A CRT screen or
LCD screen is used by most of the ATMs.
display screen he cash dispenser is the heart of the
ATM. This is a central system of the
The receipt printer prints all the ATM from where the required
details recording your withdrawal, money is obtained. From this
receipt Output cash
date and time, and the amount of portion, the user can collect the
printer device depositor.
withdrawal and also shows the balance money. The cash dispenser must
of your account in the receipt. count each bill and give the required
amount. If in some cases the money
speaker is folded, it will be moved to another
section and becomes the reject bit.
All these actions are carried out by
The speaker provides audio high precision sensors. A complete
feedback when a particular key record of each transaction is kept by
is pressed. the ATM with the help of an RTC
device.
❖ The Ram memory requirement is 256 MB (Minimum) / 512 MB (Recommendable)
❖ The Hard Disk free space requirement is 200 MB
❖ Pentium 4 processor 1Ghz.
In the following pictures we have the internal structure of two different type of ATM machine.
And also it can be divided into two different parts:
- Upper Unit
- Lower Unit
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In the upper unit it has the CPU that processes and validates customer details by connecting
to the bank computer after customer has entered ATM card.
This ATM has few layered boxes in the lower unit of it. These boxes are called currency boxes
or cassettes where currencies are kept for withdrawal or the deposited money to be kept.
A rubber roller is there to check if more than one banknote is moving and also sensor to see
that more than one banknote or bill stuck together or not when cash is dispensing.
There is a receipt printer as we see in the figure to print current statistics of the cardholder’s
account or every times cardholder withdraws cash.
❖ The Operating System on which this software can run easily,
Windows XP/Vista/7
❖ The Front End of the software is Java
❖ The Back End of this software is Microsoft MS ACCESS
➢ The users access their accounts through a special type of plastic card that is encoded with
user information on a magnetic strip.
➢ The strip contains an identification code that is transmitted to the bank’s central computer by
modem.
➢ The users insert the card into ATMs to access the account and process their account
transactions.
