Password and Smart Card Password and Smart Card based Door Lock based Door Lock
Contents:Contents:
IntroductionIntroduction Need of Micro-controllersNeed of Micro-controllers Pin Description of 8051 Pin Description of 8051 Project IdeaProject Idea Circuit DiagramCircuit Diagram Components UsedComponents Used Final ProjectFinal Project ApplicationsApplications
Why do we need to learn Why do we need to learn Microcontrollers?Microcontrollers?
The microcontroller is the core of computer systems.
Nowadays many communication, digital entertainment, portable devices, are controlled by them.
Provides high Performance and Reliability.Way to Robotic Generation.Playing vital role in Medical sector.
Different aspects of a microcontroller
Hardware: Interface to the real world
Software : Order how to deal and control
the Inputs
Pin Description of the 8051Pin Description of the 8051
1234567891011121314151617181920
4039383736353433323130292827262524232221
P1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7RST
(RXD)P3.0(TXD)P3.1
(T0)P3.4(T1)P3.5
XTAL2XTAL1
GND
(INT0)P3.2(INT1)P3.3
(RD)P3.7(WR)P3.6
VccP0.0(AD0)P0.1(AD1)P0.2(AD2)P0.3(AD3)P0.4(AD4)P0.5(AD5)P0.6(AD6)P0.7(AD7)EA/VPPALE/PROGPSENP2.7(A15)P2.6(A14)P2.5(A13)P2.4(A12)P2.3(A11)P2.2(A10)P2.1(A9)P2.0(A8)
8051(8031)
Password and Smart Card Password and Smart Card based Door Lock based Door Lock
Security is a prime concern in our
day-today life. Everyone wants to be as much secure as possible. An access control for doors forms a vital link in a security chain. The micro-controller and punch card based Door locker is an access control system that allows only authorized persons to access a restricted area.
Project Idea!Project Idea!
The system has a Keypad consisting of 12 keys by which the password can be entered through it. When the entered password equals with the password stored in the memory then 7-segment display gives the signal to punch the card and if right card is punched door is unlocked.If wrong password is entered or wrong card is punched fail signal is given by 7-segment display.
Circuit DiagramCircuit Diagram
Components UsedComponents Used
Atmel Microcontroller 7-segment display Opto-couplers (sensors) Voltage Regulator
7-Segment Displays7-Segment Displays
It is used as a numerical indicator on many equipments
It is an assembly of light emitting diodes which can be powered individually.
The one shown is a common anode display since all anodes are joined together and go to the positive supply.
Resistors must be placed in series with each diode to limit the current through each diode to a safe value.
.
OptocouplerOptocoupler
Optocoupler is an interaction between Optics and Circuitry. Optocouler is basically a sensor and receiver within a close
environment. These are commonly used when two devices need to
communicate but must not transfer any volt.,current etc. from one circuit to another.
Voltage RegulatorVoltage Regulator
A device or circuit that maintains a load voltage nearly constant over a range of variations of input voltage and load current.
It has three pins for input,output and
ground. 78-series for positive voltage supply. 79-series for negative voltage supply.
Final Project-How does it Final Project-How does it WorkWork
Voltage supply is connected. Project PCB is then connected to CPU card. Now Software designed for the project is programmed on Microcontroller Chip. Press 4 digit password and then confirm it by pressing the Enter key on the keypad. If password is wrong ‘F’ will be displayed on 7- segment display. If password is right ‘0’ will be displayed. In case Password is correct punch the smart card. If right card is punched then ‘P’ will be displayed on 7- segment display. Otherwise ‘F’ will be displayed.
ApplicationsApplications
Home Security Systems. Bank Lockers. Computer Systems and Laptops. Automobiles. ATM machines.
THANX
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