LITERATURE REVIEW
2.1
History
I key is the automatic fingerprint recognition system will be used
now and can be called intelligent systems. Generally, it is defined as the
systems that upgrade something that exists already. In the I-key system,
fingerprint reader is used to replace the conventional key at the vehicle as a
starter. This system is designed to overcome problems in the previous product.
For the past few years fingerprint scanners were considered to be
a very costly and high end technology. We have seen it only in thriller and
science fiction movies. But now, these devices have been popping up in almost
all places like offices, cell phone and our laptops. For example, suppose you
have fingerprint scanners enabled laptop. You need to visit a site which you
haven’t seen for a long time. You even forgot the password, thus you need to
get a new password for entering the site. These entire problems can be solved
by using a password storing fingerprint reader.
2.2 Present Work
In
this project, the I-key is done by using the fingerprint reader. The
fingerprint reader is used as the input component which read a data. In order
to process the data, the microcontroller (PIC) is used as the processing
mechanisms. For the display output, the motor and LED indicator are used. Each
PIC has different characteristic and specification. Therefore, the PIC 16F788A
is selected to use as the processor component in this project. It is because
PIC 16F788A has many advantages like have many ports, high speed, large memory
and other else. For output, the DC motor is used in this project. It is because
in this project the motor will show the real situation.
For
this project, I-key for vehicle have be upgraded from the previous design. This
project attempts to overcome the problem faced by consumer. This project use a
new system that can prevent the vehicle from be stolen. This system has
fingerprint reader and key as an input. But if the key is duplicates by others,
the vehicle cannot be start. Other else, when the vehicle needs to send to the
mechanic, the principal owner can disable the fingerprint system. Then the
vehicle can use key as a starter. This system also has its own power source,
means when the vehicle battery is disconnect, but the system can run normally.
The data stored not is lost. The data can be saved up to five pairs different
fingerprint.
2.2.1 Current Microcontroller (PIC16F877A)
The
Microcontroller that will be used is PIC16F877A. This microcontroller is act as
the main component that will be interface with the reader in order to save or
store the data from the level sensor which is will be sent to the PC to be
store. The features of PIC16F877A as follows:
·
256 bytes of EEPROM data memory
·
Self programming
·
ICD (In Circuit Debugging function)
·
2 Comparators
·
8 channels of 10-bit Analog-to-Digital (A/D) converter
·
2 capture/compare/PWM functions
·
The synchronous serial port can be configured as either
3-wire Serial Peripheral Interface (SPI™) or the 2-wire Inter-Integrated
Circuit (I²C™) bus.
·
Universal Asynchronous Receiver Transmitter (USART)
The software for PIC 16F877A can be written using
·
Assembly Language
·
C programming
2.3 Summary of Chapter
This chapter
basically to open the idea from the history of the safety vehicle. So in this
chapter describe the previous and present method that will be used to design
and how to produce the safety system for vehicle. To explain the history used
some references such as books, journals and internet. By having the information
clearly explained to develop the idea to create the device that lower cost and
time in people society might as well get more new knowledge to be applied in
their life. This fingerprint reader can
be used in any application. By applying fingerprint reader in vehicle system,
the vehicle can be more safety and sophisticated. By study about these
fingerprint reader, we can understand how its function and to apply it in any
application.
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