Report on Door Lock System

Microcontroller Based Door Locking System

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CHAPTER – 1

INTRODUCTION

ECE DEPARTMENT, MIT MANDSAUR Page 1


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Chapter 1 1.1 Introduction 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

microcontroller based Door locker is an access control system that allows only authorized persons to access a restricted area. The system is fully controlled by the 8 bit microcontroller AT89C2051 which has a 2Kbytes of ROM for the program memory. The password is stored in the EPROM so that we can change it at any time. The system has a Keypad by which the password can be entered through it. When the entered password equals with the password stored in the memory then the relay gets on and so that the door is opened. If we entered a wrong password for more than three times then the Alarm is switched on. The default password is 1111 and you can change the password by dialing 1234, old password, new password #button. for example if you want to change the password from the default to 4523 then dial 123411114523# after dialing you can hear a beep sound which confirm the operation goes successful. There are two relays one to open the door and other to close the door. There is an button which should be placed inside the door so that the person inside can open/close the door. The passwords are stored on the EEPROM chip. The EEPROM works on I2C technology.

1.2 Literature Survey Other Door Locks System Available There are lots of security systems in the market nowadays. These systems are studied in order to obtain some idea for the project that was built. Although the system in the market nowadays is suite with new technology and more advanced the idea must still need to be obtain through the literature review. The literature review works help to expose and generate skills of searching for information from a various sources. These skills are very important in order to solve the problems that encountered or will face in the future. ECE DEPARTMENT, MIT MANDSAUR Page 2


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PARADOX Security System This security system is from the Paradox Company. The system has many kinds of modules. One of them is wireless expansion module that act as receiver from the wireless sources such as mobile phone. This gives the idea for this project by using a mobile telephone. It is quite complex system because have many ways to activate the control panel. For this project, the idea of using a wireless communication is adapted to build the system.

MICROENGINE System This door lock security system is from the Micro engine manufacturer. It consists of the input part, controller part and the output part. The input is using the smart card that use to activate the door. Next for the controller it uses the XP-M1000X as a controller. Then for the output it haves push button, emergency break glass and the door lock circuit. The door lock circuit is using the electromagnetic principle .So for the project that will be builds; the concept of the electromagnetic principle will be use in the project.



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CHAPTER - 2

OBJECTIVE OF STUDY



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Chapter 2 OBJECTIVE OF STUDY 2.1 Components Details Resistor

Resistor is a component that resists the flow of direct or alternating electric circuit. Resistors can limit or divide the current, reduce the voltage, protect an electric circuit, or provide large amounts of heat or light. An electric current is the movement of charged particles called electrons from one region to another. Resistors are usually placed in electric circuits. Physicists explain the flow of current through a material, such as a resistor, by comparing it to water flowing through a pipe. Resistors are designed to have a specific value of resistance. Resistors used in electric circuits are cylindrical. They are often color coded by three or four color bands that indicate the specific value of resistance. Resistors obey ohm’s law, which states that the current density is directly proportional to the electric field when the temperature is constant.

Capacitor

Capacitor or electric condenser is a device for storing an electric charge. The simplest form of capacitor consists of two metal plates separated by a non touching layer called ECE DEPARTMENT, MIT MANDSAUR Page 5


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the dielectric. When one plate is charged with electricity from a direct current or electrostatic source, the other plate have induced in it a charge of the opposite sign; that is, positive if the original charge is negative and negative if the original charge is positive. The electrical size of the capacitor is its capacitance. Capacitors are limited in the amount of electric charge they can absorb; they can conduct direct current for only instances but function well as conductors in alternating current circuits. Fixed capacity and variable capacity capacitors are used in conjunction with coils as resonant circuits in radios and other electronic equipment. Capacitors are produced in a wide variety of forms. Air, Mica, Ceramics, Paper, Oil, and Vacuums are used as dielectrics depending on the purpose for which the device is intended.

Relay

A relay is a simple electromechanical switch made up of an electromagnet and a set of contacts. Current flow through the coil of the relay creates a magnetic field which attracts a lever and changes the switch contacts. The coil current can be ON or OFF so relay have two switch positions and they are double throw (changeover) switches. Relays allow one circuit to switch a second circuit which can be completely separate from the first. For example a low voltage battery circuit can use a relay to switch a 230V AC mains circuit. There is no electrical connection inside the relay between the two circuits; the link is magnetic and mechanical. The coil of a relay passes a relatively large current, typically 30mA for a 12V relay, but it can be as much as 100mA for relays designed to operate from lower voltages. Most ICs (chips) cannot provide this current and a transistor is ECE DEPARTMENT, MIT MANDSAUR Page 6


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usually used to amplify the small IC current to the larger value required for the relay coil. Relays are usually Single Pole Double Throw (SPDT) or Double Pole Double Throw (DPDT) but they can have many more sets of switch contacts, for example relays with 4 sets of changeover contacts are readily available.

Relay Driver (ULN 2003) The ULN2003 are high voltage, high current Darlington arrays each containing seven open collector Darlington pairs with common emitters. Each channel rated at 500mA and can withstand peak currents of 600mA. Suppression diodes are included for inductive load driving and the inputs are pinned opposite the outputs to simplify board layout. Features: 1. Seven Darlington per package 2. Output current 500ma per driver (600ma peak) 3. Output voltage 50v 4. Integrated suppression diodes for inductive loads 5. Outputs can be paralleled for higher current 6. TTL/CMOS/PMOS/DTL compatible inputs 7.

Inputs pinned opposite outputs to simplify layout

Pin Diagram



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The AT24C02 provides 2048 bits of serial electrically erasable and programmable readonly memory (EEPROM) organized as 256words of 8 bits each. The device is optimized for use in many industrial and commercial applications where low-power and lowvoltage operation are essential. The AT24C02 is available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead MAP, 5-lead SOT23 (AT24C02) and 8-lead TSSOP packages and is accessed via a 2-wire serial interface. In addition, the entire family is available in 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 5.5V) versions.

Features: 1. Low-voltage and Standard-voltage Operation •

2.7 (VCC = 2.7V to 5.5V)

2. Internally Organized 128 x 8 (1K), 256 x 8 (2K), 3. 2-wire Serial Interface 4. Schmitt Trigger, Filtered Inputs for Noise Suppression 5. Bi-directional Data Transfer Protocol 6. 100 kHz (1.8V, 2.5V, 2.7V) and 400 kHz (5V) Compatibility 7. Write Protect Pin for Hardware Data Protection 8. 8-byte Page (1K, 2K), 16-byte Page (4K, 8K, 16K) Write Modes 9. Partial Page Writes are Allowed 10. Self-timed Write Cycle (10 ms max) 11. High-reliability •

Endurance: 1 Million Write Cycles

•

Data Retention: 100 Years

12. Automotive Grade, Extended Temperature and Lead-Free Devices 13. 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead MAP, 5-lead SOT23 and 8-lead 14.

TSSOP Packages



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Pin Description

Pin Diagram



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2.2 Interfacing Of Components The microcontrollers reads user's programs and executing the expected task as per instructions stored there in. Its primary elements are an 8 bit Arithmetic Logic Unit (ALU), Accumulator (Acc), few more 8 bit registers, B register, Stack Pointer (SP), Program Status Word (PSW) and 16 bit registers, Program Counter (PC) and Data Pointer Register (DPTR). The ALU (Acc) performs arithmetic and logic functions on 8 bit input variables. Arithmetic operations include basic addition, subtraction, multiplication and division. Logical operations are AND, OR, Exclusive OR as well as rotate, clear, complement and etc. Apart from all the above, ALU is responsible in conditional branching decisions, and provides a temporary place in data transfer operations within the device. B register is mainly used in multiply and divide operations. During execution, B register either keeps one of the two inputs and then retains a portion of the result. For other instructions, it can be used as another general purpose register.

Features of AT89C2051 1. Compatible with MCS-51 Products 2. 2 Kbytes of Reprogrammable Flash Memory 3. Endurance: 1,000 Write/Erase Cycles 4. 2.7 V to 6 V Operating Range 5. Fully Static Operation: 0 Hz to 24 MHz 6. Two-Level Program Memory Lock 7.

128 x 8-Bit Internal RAM

8. 15 Programmable I/O Lines 9. Two 16-Bit Timer/Counters 10. Six Interrupt Sources 11. Programmable Serial UART Channel ECE DEPARTMENT, MIT MANDSAUR Page 10


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12. Direct LED Drive Outputs 13. On-Chip Analog Comparator 14.

Low Power Idle and Power Down Modes

Description The AT89C2051 is a low-voltage, high-performance CMOS 8-bit microcomputer with 2 Kbytes of Flash Programmable and erasable read only memory (PEROM). The device is manufactured using Atmel’s high density nonvolatile memory technology and is compatible with the industry Standard MCS- 51Ô instruction set and pinout. By combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel AT89C2051 is a powerful microcomputer which provides a highly flexible and cost effective solution to many embedded control applications.

PIN Configurations



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Block Diagram



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PIN DESCRIPTION OF AT89C2051



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2.3 Software Details The layout is made by using EAGLE software. This software convert the schematic diagram into board form which is the actual layout of circuit diagram. EAGLE is an EDA program by CadSoft for creating printed circuit board. The name is an acronym formed from Easy Gnzuwendender rafischer Layout A Editor. CadSoft Eagle and company in September 2009, premier farnell sells, a supplier of electronic components. The software consist of several of components Layout Editor, Schematic Editor, Auto router and an extensible component database. It is for the platform Microsoft Windows , Linux and Mac OS X erhältlich. It is for the platforms Microsoft Windows , Linux and Mac OS X available. LED1 EQU P3.0 LED2 EQU P3.1

SWITCH

EQU P3.2

SDA EQU P3.4

;SDA=PIN5

SCL EQU P3.3

;SCL=PIN6

WTCMD EQU

10100000B

;WRITE DATA COMMAND Note 3

RDCMD EQU

10100001B

;READ DATA COMMAND Note 3

ALRM EQU P3.5

OPEN EQU P3.7 CLOSE

EQU P1.0

KEYS EQU P1

ROW1 EQU P1.1 ROW2 EQU P1.2 ECE DEPARTMENT, MIT MANDSAUR Page 14


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ROW3 EQU P1.3 ROW4 EQU P1.4 COL3 EQU P1.5 COL2 EQU P1.6 COL1 EQU P1.7

DSEG

; This is internal data memory

ORG

20H

; Bit addressable memory

KEY: DS

1

N1:

DS

1

N2:

DS

1

N3:

DS

1

N4:

DS

1

COUNT:

DS

1

PASS0:

DS

1

PASS1:

DS

1

CHANGE:

DS

1

CSEG

; Code begins here

; ---------==========----------==========---------=========--------; Main routine. Program execution starts here. 8889 ; ---------==========----------==========---------=========--------ORG

00H

; Reset

MOV SP,#60H

CLR ALRM SETB LED1 SETB LED2 ECE DEPARTMENT, MIT MANDSAUR Page 15


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CLR OPEN CLR CLOSE ;RESET THE PASSWORD TO 1111 FOR THE FIRST TIME MOV

A,#WTCMD

;LOAD WRITE COMMAND TO SEND

ADDRESS CALL OUTS MOV

;SEND IT A,#00H

;GET LOW BYTE ADDRESS

CALL OUT

;SEND IT

CALL CREAD

;GET DATA BYTE

CJNE R1,#0FFH,PASS_OKG MOV

A,#WTCMD

CALL OUTS MOV

;SEND IT

A,#00H

;GET BYTE ADDRESS

CALL OUT MOV

;LOAD WRITE COMMAND

;SEND IT

A,#11H

;GET DATA

CALL OUT

;SEND IT

CALL

;SEND STOP CONDITION

STOP

CALL DELAY CALL DELAY MOV

A,#WTCMD

CALL OUTS MOV

A,#01H

CALL OUT MOV

A,#11H

;LOAD WRITE COMMAND

;SEND IT ;GET BYTE ADDRESS ;SEND IT ;GET DATA

CALL OUT

;SEND IT

CALL


STOP

CLR LED1 SETB ALRM ECE DEPARTMENT, MIT MANDSAUR Page 16


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CALL DELAY1 CALL DELAY1 SETB LED1 CLR ALRM

PASS_OKG: MOV CHANGE,#0FFH MOV R3,#01H MOV COUNT,#00H

KEYBOARD: MOV KEY,#00H SETB COL1 SETB COL2 SETB COL3 K11:

CLR ROW1 CLR ROW2 CLR ROW3 CLR ROW4 MOV A,KEYS ANL A,#11100000B CJNE A,#11100000B,K11

K2:

ACALL DEALAY

;check till all keys released ;call 20 msec delay

MOV A,KEYS ANL A,#11100000B

;see if any key is pressed ;mask unused bits

CJNE A,#11100000B,OVER

;key pressed, await closure

SJMP K2 OVER:

ACALL DEALAY

MOV A,KEYS ECE DEPARTMENT, MIT MANDSAUR Page 17


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ANL A,#11100000B CJNE A,#11100000B,OVER1 SJMP K2 OVER1:

MOV A,KEYS

ORL A,#11111110B MOV KEYS,A CLR ROW1 MOV A,KEYS ANL A,#11100000B CJNE A,#11100000B,ROW_1 MOV A,KEYS ORL A,#11111110B MOV KEYS,A CLR ROW2 MOV A,KEYS ANL A,#11100000B CJNE A,#11100000B,ROW_2 MOV A,KEYS ORL A,#11111110B MOV KEYS,A CLR ROW3 MOV A,KEYS ANL A,#11100000B CJNE A,#11100000B,ROW_3 MOV A,KEYS ORL A,#11111110B MOV KEYS,A CLR ROW4 MOV A,KEYS ANL A,#11100000B ECE DEPARTMENT, MIT MANDSAUR Page 18


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CJNE A,#11100000B,ROW_4 LJMP K2

ROW_1:

RLC A

JC MAT1 MOV KEY,#01H AJMP K1 MAT1:

RLC A JC MAT2 MOV KEY,#02H AJMP K1

MAT2:

RLC A JC K1 MOV KEY,#03H AJMP K1

ROW_2:

RLC A



MAT4:



Microcontroller Based Door Locking System ROW_3:

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RLC A



MAT6:


ROW_4:

RLC A

JC MAT7 MOV KEY,#0AH MOV COUNT,#00H MOV CHANGE,#0FFH CLR OPEN CLR CLOSE SETB LED1 SETB LED2 MOV R3,#01H AJMP KEYBOARD MAT7:

RLC A JC MAT8 MOV KEY,#0BH

;for 0

AJMP K1 MAT8:

RLC A JC K1



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MOV KEY,#0FH

K1: CLR LED2 CALL DELAY SETB LED2

CJNE R3,#01H,G1 INC R3 MOV N1,KEY AJMP KEYBOARD G1:

CJNE R3,#02H,G2 INC R3 MOV N2,KEY AJMP KEYBOARD

G2:

CJNE R3,#03H,G3 INC R3 MOV N3,KEY AJMP KEYBOARD

G3:

CJNE R3,#04H,G4 MOV R3,#01H MOV N4,KEY

G4:

MOV A,N1 SWAP A ORL A,N2 MOV N2,A

;HIGHER DIGITSS IN N2

MOV A,N3 ECE DEPARTMENT, MIT MANDSAUR Page 21


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SWAP A ORL A,N4 MOV N4,A

;LOWER DISITS IN N4

; ---------==========----------==========---------=========--------;CHECK WITH PASSWORD STORED IN MEMORY ; ---------==========----------==========---------=========--------MOV

A,#WTCMD

CALL OUTS MOV

;LOAD WRITE COMMAND TO SEND ADDRESS

;SEND IT

A,#00H

;GET LOW BYTE ADDRESS

CALL OUT

;SEND IT

CALL CREAD

;GET DATA BYTE

MOV PASS0,R1 MOV

A,#WTCMD

CALL OUTS MOV

A,#01H

CALL OUT CALL CREAD

;LOAD WRITE COMMAND TO SEND ADDRESS

;SEND IT ;GET LOW BYTE ADDRESS ;SEND IT ;GET DATA BYTE

MOV PASS1,R1

MOV A,N2 CJNE A,PASS0, BV1 MOV A,N4 CJNE A,PASS1,BV1

MOV A,CHANGE

;Chk for Change Password

CJNE A,#0FFH,DFD1 ECE DEPARTMENT, MIT MANDSAUR Page 22


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CLR ALRM MOV COUNT,#00H CLR LED1 SETB OPEN

;Switch on open motor

CALL DELAY4 CLR OPEN SETB LED1

SETB SWITCH JB SWITCH,$

;Chk for SWITCH FOR CLOSING DOOR

JNB SWITCH,$ CLR LED1 SETB CLOSE CALL DELAY4 CLR LED1 CLR CLOSE

SETB SWITCH JB SWITCH,$

;Chk for SWITCH FOR OPENING DOOR

JNB SWITCH,$ CLR LED1 SETB OPEN CALL DELAY4 SETB LED1 CLR OPEN


Microcontroller Based Door Locking System CLR ROW4

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;chk * for door closing

SETB COL1 JB COL1,$ CLR LED1 SETB CLOSE CALL DELAY4 SETB LED1 CLR CLOSE

AJMP KEYBOARD ; ---------==========----------==========---------=========--------DFD1: MOV CHANGE,#0AAH CLR ALRM MOV COUNT,#00H AJMP KEYBOARD ; ---------==========----------==========---------=========--------BV1: MOV A,N2

;CHANGE PASSWORD

CJNE A,#12H, BV2 MOV A,N4 CJNE A,#34H,BV2 MOV CHANGE,#00H CLR ALRM MOV COUNT,#00H AJMP KEYBOARD ; ---------==========----------==========---------=========--------;

STORE NEW PASSWORD

; ---------==========----------==========---------=========---------


Microcontroller Based Door Locking System BV2: MOV A,CHANGE

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;Chk for Change Password

CJNE A,#0AAH,DFD2 MOV CHANGE,#0FFH

MOV

A,#WTCMD

CALL OUTS MOV

;LOAD WRITE COMMAND

;SEND IT

A,#00H

;GET BYTE ADDRESS

CALL OUT

;SEND IT

MOV

;GET DATA

A,N2

CALL OUT

;SEND IT

CALL


STOP

CALL DELAY CALL DELAY

MOV

A,#WTCMD

CALL OUTS MOV

A,#01H

;LOAD WRITE COMMAND

;SEND IT ;GET BYTE ADDRESS

CALL OUT

;SEND IT

MOV

;GET DATA

A,N4

CALL OUT

;SEND IT

CALL


STOP

CLR LED1 SETB ALRM CALL DELAY1 CALL DELAY1 SETB LED1 CLR ALRM AJMP KEYBOARD ECE DEPARTMENT, MIT MANDSAUR Page 25


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; ---------==========----------==========---------=========--------DFD2: INC COUNT MOV A,COUNT CJNE A,#03H,HH1 SETB ALRM CLR LED1 MOV CHANGE,#0FFH MOV COUNT,#00H HH1: AJMP KEYBOARD

;(((((((((((((((((((((((((((((((( DEALAY: MOV R1,#50 REPP2:

NOP DJNZ R1,REPP2 RET

;(((((((((((((((((((((((((((((((( ;*********************************************************************** ; THIS ROUTINE SENDS OUT CONTENTS OF THE ACCUMULATOR ; to the EEPROM and includes START condition. Refer to the data sheets ; for discussion of START and STOP conditions. ;***********************************************************************

OUTS: MOV

R2,#8

;LOOP COUNT -- EQUAL TO BIT COUNT

SETB SDA

;INSURE DATA IS HI

SETB

;INSURE CLOCK IS HI

NOP

SCL

;NOTE 1

NOP ECE DEPARTMENT, MIT MANDSAUR Page 26


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NOP NOP

;NOTE 1

NOP NOP CLR

SDA

;START CONDITION -- DATA = 0

NOP NOP

;NOTE 1

NOP NOP

;NOTE 1

NOP NOP CLR

SCL

OTSLP: RLC JNC SETB JMP

;CLOCK = 0

A

;SHIFT BIT

BITLS SDA

;DATA = 1

OTSL1

BITLS: CLR

;CONTINUE

SDA

OTSL1: SETB

;DATA = 0

SCL

NOP

;CLOCK HI ;NOTE 1

NOP NOP NOP

;NOTE 1

NOP NOP CLR

SCL

DJNZ

R2,OTSLP

SETB

SDA

NOP

SETB

;CLOCK LOW ;DECREMENT COUNTER ;TURN PIN INTO INPUT ;NOTE 1

SCL

;CLOCK ACK


Microcontroller Based Door Locking System NOP

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;NOTE 1

NOP NOP NOP

;NOTE 1

NOP NOP

CLR

SCL

RET

;********************************************************************** ; THIS ROUTINE SENDS OUT CONTENTS OF ACCUMLATOR TO EEPROM ; without sending a START condition. ;**********************************************************************

OUT: MOV

R2,#8

OTLP: RLC

A

JNC

;SHIFT BIT

BITL

SETB JMP

;LOOP COUNT -- EQUAL TO BIT COUNT

SDA OTL1

BITL: CLR

SDA

OTL1: SETB

SCL

NOP

;DATA = 1 ;CONTINUE ;DATA = 0 ;CLOCK HI ;NOTE 1

NOP NOP

;NOTE 1

NOP NOP NOP

CLR

SCL

;CLOCK LOW


Microcontroller Based Door Locking System DJNZ

R2,OTLP

SETB

SDA

NOP

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;DECREMENT COUNTER ;TURN PIN INTO INPUT

;NOTE 1

SETB

SCL

NOP

;CLOCK ACK ;NOTE 1

NOP NOP NOP

;NOTE 1

NOP NOP CLR

SCL

RET

STOP: CLR

SDA

NOP

;STOP CONDITION SET DATA LOW ;NOTE 1

NOP NOP NOP

;NOTE 1

NOP NOP SETB

SCL

NOP

;SET CLOCK HI ;NOTE 1

NOP NOP NOP

;NOTE 1

NOP NOP SETB

SDA

;SET DATA HIGH



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RET

;******************************************************************* ; THIS ROUTINE READS A BYTE OF DATA FROM EEPROM ; From EEPROM current address pointer. ; Returns the data byte in R1 ;******************************************************************* CREAD: MOV

A,#RDCMD

CALL OUTS CALL

IN

MOV

R1,A

CALL

STOP

;LOAD READ COMMAND

;SEND IT ;READ DATA ;STORE DATA ;SEND STOP CONDITION

RET

;********************************************************************** ; THIS ROUTINE READS IN A BYTE FROM THE EEPROM ; and stores it in the accumulator ;**********************************************************************

IN:

MOV SETB

INLP: CLR NOP

R2,#8 SDA SCL

;LOOP COUNT ;SET DATA BIT HIGH FOR INPUT ;CLOCK LOW ;NOTE 1

NOP NOP NOP

;NOTE 1

NOP NOP NOP ECE DEPARTMENT, MIT MANDSAUR Page 30


SETB

SCL

CLR

C

JNB

SDA,INL1

CPL

C

INL1: RLC

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;CLOCK HIGH ;CLEAR CARRY ;JUMP IF DATA = 0 ;SET CARRY IF DATA = 1

A

;ROTATE DATA INTO ACCUMULATOR

DJNZ

R2,INLP

CLR

SCL

;DECREMENT COUNTER ;CLOCK LOW

RET

;********************************************************************* ; This routine test for WRITE DONE condition ; by testing for an ACK. ; This routine can be run as soon as a STOP condition ; has been generated after the last data byte has been sent ; to the EEPROM. The routine loops until an ACK is received from ; the EEPROM. No ACK will be received until the EEPROM is done with ; the write operation. ;********************************************************************* ACKTST: MOV

A,#WTCMD

;LOAD WRITE COMMAND TO SEND

ADDRESS MOV CLR

R2,#8 SDA

NOP

;LOOP COUNT -- EQUAL TO BIT COUNT ;START CONDITION -- DATA = 0 ;NOTE 1

NOP NOP NOP NOP NOP CLR SCL AKTLP: RLC A JNC AKTLS

;NOTE 1

;CLOCK = 0 ;SHIFT BIT



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SETB SDA ;DATA = 1 JMP AKTL1 ;CONTINUE AKTLS: CLR SDA ;DATA = 0 AKTL1: SETB SCL ;CLOCK HI NOP ;NOTE 1 NOP NOP NOP ;NOTE 1 NOP NOP CLR SCL ;CLOCK LOW DJNZ R2,AKTLP ;DECREMENT COUNTER SETB SDA ;TURN PIN INTO INPUT NOP ;NOTE 1 SETB SCL ;CLOCK ACK NOP ;NOTE 1 NOP NOP NOP ;NOTE 1 NOP NOP JNB SDA,EXIT ;EXIT IF ACK (WRITE DONE) JMP ACKTST ;START OVER EXIT: CLR SCL ;CLOCK LOW CLR SDA ;DATA LOW NOP ;NOTE 1 NOP NOP NOP ;NOTE 1 NOP NOP SETB SCL ;CLOCK HIGH NOP NOP NOP ;NOTE 1 NOP NOP SETB SDA ;STOP CONDITION RET DELAY: INLOP:

MOV R0,#0FH MOV R1,#0FFH DJNZ R1,$ DJNZ R0,INLOP



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RET DELAY1: INLOP1:

MOV R0,#0FFH MOV R1,#0FFH DJNZ R1,$ DJNZ R0,INLOP1 RET

DELAY4: INLO2: INLO1:

MOV R5,#12H CPL LED1 MOV R0,#0FFH MOV R1,#0FFH DJNZ R1,$ DJNZ R0,INLO1 DJNZ R5,INLO2 RET

END



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Chapter 3

DETAILS OF TECHNOLOGY



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Chapter 3 Details Of Technology 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 microcontroller based Door locker is an access control system that allows only authorized persons to access a restricted area. The system is fully controlled by the 8 bit microcontroller AT89C2051 which has a 2Kbytes of ROM for the program memory. The password is stored in the EPROM so that we can change it at any time. The system has a Keypad by which the password can be entered through it. When the entered password matches with the password stored in the memory then the relay gets on and so that the door is opened. If we entered a wrong password for more than three times then the Alarm is switched on. And this Alarm can be turned off only after entering a valid User Access Code. This function thwarts any attempt by ‘hackers’ to quickly try a large number of codes in a sequence. The major components used in this system are:

Microcontroller Relay Alarm Keypad The microcontroller used here is a common 8 bit Atmel microcontroller AT89C2051.It is a low power, high-performance CMOS 8-bit microcontroller with12K bytes of In-System Programmable (ISP) Flash program memory and 2K bytes of EEPROM data memory. It has 32 programmable input output lines .The resulting architecture is more code efficient. Outputs from port pins of the microcontroller are fed to inputs IN1 through IN4 and enable pins of motor driver respectively, to drive geared motors.



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Chapter 4

PROBLEM FORMATION AND METHOLOGY



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Chapter 4 4.1 Problem formation and Methology The main and very basic need of security was fulfilled by using the mechanical or electrical locks which are very heavy and designed for only one key. Therefore a large number of locks of required for locking a large industries there are many keys for different locks (i.e. a very tedious task to arrange these keys). These locks are not so much protective and could be broken by using some mechanical tools. All these problems could be solved if we use electronic locking system in place of these electrical & mechanical locks. There are also some more features are available in these electronic locking system The electronic security system are very light, flexible, reprogrammable, lower cost, more accurate, highly secure and required less power. In this way due to the introduction of the electronic security system the security need and fulfilled to a great extent and we could protect a whole industry or company very easily and rapidly.

4.2 Definition (a) Block diagram



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(b) Circuit diagram

(c) Details The Main Part of the above Circuit diagrams is the Microcontroller AT89C2051. The Keypad was the input device and it was connected in a matrix format so that the numbers of ports needed are reduced. The Microcontroller reads a four-digit password through the Keypad. Then the Microcontroller compares the four digit password with the number ECE DEPARTMENT, MIT MANDSAUR Page 38


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which is preprogrammed and if it is equal then the Microcontroller will switch on the motor for the door and if we enter the wrong password for more than three times then an alarm will be switched on until a right password was pressed through the Keypad. The Password was stored in the EEPROM and the password can be changed at any time using the same keypad. To change the password dial 1234 –Old password- New Password. The power supply section is the important one. It should deliver constant output regulated power supply for successful working of the project. A 0-12V/500 Ma transformer is used for our purpose the primary of this transformer is connected in to main supply through on/off switch& fuse for protecting from overload and short circuit protection. The secondary is connected to the diodes convert from 12V AC to 12V DC voltage. Which is further regulated to +5v.

(d) Flowchart



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(e) Design Specification In this age of digital technology, every device and operation has become digital based. Now with digital based door lock systems, it is easier to control the door movement. The new automated door lock system does not need a key to lock or unlock the door. This digital door entry system is in fact controlled by keypad that is installed on the side wall of the door. The keyless door is an electronic circuit based device. The working of this locking system is very simple. It works on the entry number. The authenticated person has to enter the unique code using keypad. You can install a keyless entry system in your house as well as in buildings and offices. With this system, you will never be in tension of leaving the sensitive areas out of your supervision.

(f) Component List 1. Resister : 10 k ohm(qty 3) 56 k ohm (1) 330E (2) 2. Capacitor :electrolytic (1 micro farad / 12 v)(1 qty) Ceramic (33pf, qty 2) 3. ICS

:AT89C2051 (with burn, qty 1) IC 24co2 (qty 1|) IC – ULN2003 (qty 1)

4.Crystal Oscillator (12MHZ, qty 1) 5 Buzzer (qty 1) 6 Relay (12 volts, qty 2) 7 Keypad (Switch Matrix, qty 1) 8 Motor (open and close switch or electronics lock, qty 2) ECE DEPARTMENT, MIT MANDSAUR Page 40


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9 Led (1 red and 1 blue) 10 push button (qty 2) 11 Resistor networks (10k, qty 1) 12 Battery (12v, 5v (5 ki 2)) 13 transformer (12v) 14 IC 7805



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Chapter 5

SIMULATION AND RESULT



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Chapter 5 Simulation and Result 5.1 Layout

5.2 Flowchart of process



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5.3 Actual hardware diagram



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Chapter 6

APPLICATION AND LIMITATION



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Chapter 6 Applications, Advantages and Limitation

Applications For security purpose For locking purpose

Advantages

The main advantages of this device are as follows:

Highly secure Flexible & Reprogrammable Wide operating range & wide operating area Less power consumption Remotely controlled ECE DEPARTMENT, MIT MANDSAUR Page 46


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Cost effective & Easily available Limitation Difficult to implement Source code is comparatively complex

Scope of future work Electrical devices such us Lights, Computer etc can be controlled by using separate passwords. The system can be easily connected to the personal computer for further control.

Conclusion Our electronic door lock performed as expected. We were able to implement all of the functions specified in our proposal. The biggest hurdle we had to overcome with this project was interfacing the micro controller with the hardware components. We feel that this electronic door lock is very marketable because it is easy to use, comparatively inexpensive due to low power consumption, and highly reliable. This door lock is therefore particularly useful in applications such as hotel room door locks, residential housing, and even office buildings.

REFERENCES www.scibd.com ECE DEPARTMENT, MIT MANDSAUR Page 47


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www.bing.com www.ehow.com www.8051projects.info www.howstuffworks.com www.answer.com


Report on Door Lock System

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