17-03-2014, 09:21 PM
Abstract—The memory cards are widely used in several
applications. This paper is intended to design and construct
of the encrypted card reader. The basic building block in
this design is the card reader, amplifier, multiplexer, and PC
parallel port. This card can be used in license, passport,
credit card, ID card, bank card, health care, travel and
entertainment cards and etc. In this paper, data on a card
can be protected against unauthorized viewing.
Key words: Card Information; IR Sensors; IR Detectors;
Multiplexer; Parallel Port; Optocoupler
I. INTRODUCTION
Card readers are simple devices that are very helpful
for anyone who uses any type of card media. With all
different devices using so many different types of
memory cards it is a pain to have card readers for each
different type of card. That is why card readers have
become very popular. They can use many different types
of memory cards. They are easy to use and travel with [9].
The card has emerged during the past decade as a
remarkable technical solution to a variety of card system
applications. Electronics cards have been developed for
such traditional card uses as credit cards and banking
applications as well as prepaid, throw-away cards, such as
telephone cards. In addition, a great many novel
applications have been propose which genuinely exploit
the electric data processing available in the card [10].
II. OVERVIEW OF THE SYSTEM
The paper emphasizes on the encrypted data with the
card and PC parallel port. The data based on the incoming
card information. This data is used in this design. To
simplify the hardware design, 5V power supply is decided
to be used for the system. Thus, all components must be
worked on 5V power supply. The card data and PC are
used as the main of the system because the encrypted data
stored in the card and PC.
A. Computerized Control Portion of the System
Among the I/O ports of the computer system, parallel
interfacing is applied in this system to input the data and
to output the display.
The standard parallel port uses three contiguous
addresses, usually in one of these ranges:
3BCh, 3BDh, 3BEh
378h, 379h, 37Ah
278h, 279h, 27Ah
The first address in the range is the port’s base address,
also called the Data register or the port address. Among
the Data pins of the parallel port, whose IO address is
0x378h, the D0 pin is used for select pin to the
multiplexer. The second address is the port’s Status
register, the third is the Control register.