Project VIII Presentation

8/8/2019 Project VIII Presentation

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Microcontroller BasedDigital Code Lock

Presenters:

Ravi Ponnaiah

Muhammad Asim


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Presentation Agenda

introduction

design

verification

conclusion

Introduction of the Project

Feature & Benefit

Project Design

Main Components

Components

Accomplishment

Ethical Consideration


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Introduction of the Project

Security is a prime concern in our

day-today life.

An access control forms a vital link ina security chain.

This is Microcontroller based project

as a security barrier. Can be utilized as door lock or other

security barrier.

An access control system that allows


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Features & Benefit

Features: Security for a little price

Easy to implement

Benefits: Peace of mind.

Convenient security monitoring system.

Can be modified as needed easily.


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Harvard Architecture

Uses separate memories forprogram and data with theirindependent address and data

buses. Because of two different streams

of data and address, there is noneed to have any time division

multiplexing of address and databuses.

Supports parallel buses foraddress and data

Allows a different internalor anization such that instruction

CPU

Program

Memory

Data

Memory

Program

Memory

Data

Memory


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Programs and data share the

same memory space.

Allows storing or modifying theprograms easily.

The code storage may not be

optimal and requires multiplefetches to form the instruction.

Program and data fetches are

done using time division

multiplexing which affect the

Von Neumann Architecture

CPU

Memory


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Logic Gates

Boolean Algebra

Map Specification Combinational Circuits (Registers,

Counters)

Flip-Flops

Sequential Circuits

Memory Components

(ROM,PROM,EPROM)

Integrated Circuits (VLSI, CMOS)

heory Behind Project Development


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Data Types

Complements (1s, 2s)

Fixed Point Representations Floating Point Representations

Other Binary Codes (BCD,GRAY

CODE) Error Detection Codes (Even and

Odd Parity)

Data Representation


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Register Transfer & Micro-Operations

Register TransferLanguage (ShiftLoad Clear Increment)

Register Transfer(R f (R, R)

Bus and Memory Transfers

Arithmetic Microoperations

Logic Microoperations

Shift Microoperations

Arithmetic Logic Shift Unit


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Basic Computer Organization & Design

Instruction Codes

Computer Registers

Computer Instructions

Timing and Control Instruction Cycle

Memory Reference Instructions

Input-Output and Interrupt

Complete Computer Description

Design of Basic Computer

Design of AccumulatorLogic


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Introduction

Machine Language

Assembly Language

Assembler

Program Loops

Programming Arithmetic and LogicOperations

Subroutines Input-Output Programming

Programming the Basic Computer


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Project Design

This system uses a

programmable microcontroller

which is programmed for 3different functionalities.

Unlock the door by matching

the security code entered bythe user.

Allows to set our own security

code.


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Project Design

The system comprises a number keypad and thekeypads are connected to the 8 bit microcontroller

AT89C2051(Atmel). This is one of the popularMicrocontroller. It has only 20 pins and there are15 input/output lines. The microcontroller has aprogram memory of 2 Kilobytes.

The circuit works with the Microcontroller 89C2051and a ROM 24C08. Other components includeCapacitors, Resistors, LEDs, Push Buttons, Rileyand a crystal Oscillator. The basic working and

operation is done through a Keypad that takesinput sends it to 89C2051 where thismicrocontroller process the input through aProgram stored into it.

The circuit responds to the input as either a correctcode or a false code.

In case of a correct code a voltage output is been


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Project Design - flowchart

CHECKTHEPASSWORD

READKEYPAD

START

DOOR OPEN

CHECKIF WRONGPASSWORDENTERED

3 X

ALARM ON

CORRECT

WRONG

3 PASSWORD ATTEMPT

NOTE:1. Change Password

2. Manual Open


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KEYPAD

EEPROM

MICRO

CONTROLLER

AT89C2051

RELAY DRIVER

&

RELAYS

MOTOR

Project Design block diagram


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Project Design circuit diagram

10k

G

D

5

8

6

7

123

SDA

VCC

SCL

WP

A0A1A2

16Vdc

LM7805C

D1

4007

1000u

10u

10k

390

LS1

Relay SPDT

35

412

1

2

D1

4007

100u

C828

30p

1

2

24C0B

AT89C2051

1

20

54

1213141516171819

23678911

RST

VPP

VCC

XTAL1XTAL2

P1.0/AI

0P1.1/AI

1P1.2P1.3P1.4P1.5P1.6P1.7

P3.0/RXDP3.1/TXD

P3.2/I

T0P3.3/I

T1P3.4/T0P3.5/T1

P3.7

D1

4007

30p

220n

10k

220n

10k

100

D1

4007

1 2

390

390

10k


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Conclusion

Accomplishment:

Board design which is pact and simple.

The invasive design gives the prototype model to

use easily and can be implemented to make it towork with cell phone to open the lock remotely.

Furthermore use of AT89C2051 give us flexibilityto work around with other components in a costeffective way.

Ethical Consideration:

Created a device that is user friendly

Eliminate the risk of PCB board replaced visible

wire usage.

Project VIII Presentation

Documents

Transcript of Project VIII Presentation