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