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02-02-2010, 10:06 PM
Post: #1
digital code lock full report

.doc  DIGITAL CODE LOCK.doc (Size: 98 KB / Downloads: 1503)


TITLE : DIGITAL CODE LOCK

INTRODUCTION

Here is a project called ˜Digital Code Lock using AT89C2051'. LCD is used for display and a keyboard is used to input the keys. This project source code is written in C.This a simple project with efficient hacking prevention from Brute Force etc. The basic user lock is of 5 Digits and Master Lock is of 10 digits so its not easy for an intruder to break the lock unless you keep the code simple.The input is taken from a 4×3 Keypad (please see the schematic for more information) and Display the user input on a 2×16 LCD. A pin is assigned as output for activating and deactivating the lock. For demonstration an LED is connected to that pin.The user has two options either he/she can use its own 5 digit code or use the default 5 digit code. If user has to do setup his own code, then he has to enter 12345 and press ˜#™. After this.. controller will ask for 10 Digit master password which is preprogrammed in the controller. Entering master lock, user can enter the new 5 digit code for the lock and press ˜#™ to save it.Keypad has 12 keys (4×3) starting from 1,2,3,4,5,6,7,8,9,*,0,# (please see the schematic for layout). Numeric keys are used for entering numbers. ˜*™ is used as the Cancel key and ˜#™ is used as the Enter key.

Submitted By:

Neha Sadavarte-25
Prerna Sarda-30
Radhika Gupta-32


PROJECT GUIDED BY:

Prof.M. Korde



CIRCUIT DIAGRAM

PIN DIAGRAM
WORKING
24-03-2010, 02:21 PM
Post: #2
RE: digital code lock full report
Niceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
30-03-2010, 05:02 PM
Post: #3
RE: digital code lock full report
Thank you, great to hear that you liked this report. For even more reports and projects visit this site. Please telll yor friends too.

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05-05-2010, 09:50 AM
Post: #4
WIRELESS DIGITAL CODE LOCK WITH A STATUS DISPLAY

.ppt  WIRELESS DIGITAL CODE LOCK WITH A STATUS DISPLAY.ppt (Size: 970.5 KB / Downloads: 664)

WIRELESS DIGITAL CODE LOCK WITH A STATUS DISPLAY

INDIVIDUAL PROJECT

Presented BY
R.KARTHIKMANOJ
31106106037
DONE AT K A INSPIRE SOFTWARE SOLUTIONS


PROJECT DESCRIPTION

In my project Wireless Digital Code Lock with a Status Display is used to protect the efficient hacking prevent from brute force etc.
The basic user lock is of 4 Digits and Master lock is of 1 digit so itâ„¢s not easy for an intruder to break the lock unless you keep the code simple.
The input is taken from a 4x3 Keypad
The user input is displayed on a 2x16 LCD
A pin is assigned as output for activating and deactivating the lock.
For demonstration i have connected an LED to that pin.



HARDWARE REQUIREMENTS

MICROCONTROLLER(AT89S51) UNIT
POWER SUPPLY
KEYPAD UNIT
BUZZER UNIT
SOFTWARE REQUIREMENTS
EMBEDDED C
KEIL COMPILER


SOFTWARE IMPLEMENTATION

The software used for this project is KEIL, FLASH Programmer, OrCAD and Visual Basic6.0.
Keil is used to develop the program for AT89S51 microcontroller.
Flash programmer is used to download the program into the AT89S51 microcontroller.
OrCAD software is used to design the PCB layout.

BLOCK DIAGRAM:

TRANSMITTER SECTION
BLOCK DIAGRAM:
RECIEVER SECTION
CIRCUIT DIAGRAM


MICROCONTROLLER

The AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory.


POWER SUPPLY

Power supply is a reference to a source of electrical power. A device or system that supplies electrical or other types of energy to an output load or group of loads is called a power supply unit or PSU.


STEP DOWN TRANSFORMER

The transformer is transferring the electrical voltage or current from one circuit into another circuit without changing the frequency. When (0-220V) AC is applied at the primary winding, it will step down the power supply voltage and given as(0-6V) AC in the secondary winding as an output.


ENCODER (HT12E)

The 212 encoders are a series of CMOS LSIs for remote control system applications. They are capable of encoding information which consists of N address bits and 12_N data bits.

DECODER (HT12D)

The 212 decoders are a series of CMOS LSIs for remote control system applications. They are paired with Holtek_s 212 series of encoders.
The decoders receive serial addresses and data from a programmed 212 series of encoders that are transmitted by a carrier using an RF or an IR transmission medium.


TRANSMITTER MODULE (STT433)

The transmitter operates from a 1.5-12V supply, making it ideal for battery-powered applications. The transmitter employs a SAW-stabilized oscillator, ensuring accurate frequency control for best range performance.


RECEIVER MODULE (STR433)

The STR-433 is ideal for short-range remote control applications where cost is a primary concern. The receiver module requires no external RF components except for the antenna.


LCD DISPLAY (16x2)

LCD module have 8-bit data interface and control pins. One can send data as 8-bit or in pair of two 4-bit nibbles.To display any character on LCD micro controller has to send its ASCII value to the data bus of LCD. LCD display used here is having 16x2 size. It means 2 lines each with 16 character.


KEYPAD SWITCHES

The key board here we are interfacing is a matrix keyboard. This key board is designed with a particular rows and columns. These rows and columns are connected to the microcontroller through its ports of the micro controller 8051. We normally use 8*8 matrix key board.

BUZZER

Buzzer is an electromagnet that automatically connects and disconnects many times per minute. This will cause the vibration of the armature and creation of a buzzing sound.

APPLICATIONS

Itâ„¢s used to prevent from hacking.
It can be used in any device.
It protects any device and is very secured.

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06-05-2010, 04:14 PM
Post: #5
RE: digital code lock full report
thats not a full report at all
Confused
07-05-2010, 01:25 PM
Post: #6
RE: digital code lock full report
We posted all the information we got . We will try to make it complete by adding more information.

Please Use Search http://seminarprojects.com/search.php wisely To Get More Information About A Seminar Or Project Topic
14-07-2010, 02:39 AM
Post: #7
RE: digital code lock full report
hey plzz forward this project to me. i need it.
01-10-2010, 09:52 AM
Post: #8
Smile RE: digital code lock full report

.zip  digilock.zip (Size: 20.16 KB / Downloads: 165)

INTRODUCTION

This a simple project with efficient hacking prevention from Brute Force etc. The basic user lock is of 5 Digits and Master Lock is of 10 digits so its not easy for an intruder to break the lock unless you keep the code simple.
The input is taken from a 4×3 Keypad (please see the schematic for more information) and Display the user input on a 2×16 LCD. A pin is assigned as output for activating and deactivating the lock. For demonstration i have connected an LED to that pin.
FROM USER SIDE:
The user has two options either he/she can use its own 5 digit code or use the default 5 digit code. If user has to do setup his own code, then he has to enter “12345″ and press ‘#’. After this.. controller will ask for 10 Digit master password which is preprogrammed in the controller. Entering master lock, user can enter the new 5 digit code for the lock and press ‘#’ to save it.
USING THE KEYPAD:
Keypad has 12 keys (4×3) starting from 1,2,3,4,5,6,7,8,9,*,0,# (please see the schematic for layout). Numeric keys are used for entering numbers. ‘*’ is used as the Cancel key and ‘#’ is used as the Enter key.

[Image: clockskt.jpg]
12-10-2010, 02:44 PM
Post: #9
RE: digital code lock full report
I have a free report on Password Protected Electronic Code Lock. Download this pdf file for FREE!
Click below link to download
How to make a password protected electronic code lock
14-10-2010, 01:19 PM
Post: #10
RE: digital code lock full report

.doc  SELECTED PROJECT.doc (Size: 42 KB / Downloads: 163)
Wireless electronic code locking system

Wireless electronic code locking system for industrial applications

Security is a prime concern in our day-today life. Everyone wants to be as much secure as possible. An access control over devices forms a vital link in a security chain. The project deals with a design of a simple microcontroller based system as digital lock for Devices. This system can be a control system that allows only authorized persons to access switching; the system is fully controlled by the 8 bit microcontroller AT89C51 which has internal ROM for the program memory. The pre-defined password is stored in the microcontroller.

Existing System:
Current system consists of wired device control, and it’s an unsafe procedure where any foreign body can tamper the wire physically, existing process is still far away from flaw.

Proposed System:
We are making use of RF signal for secure processing in use for safety purpose so it will be free of physical errors and it will lead us to proper communication. The keypad is provided so that the password can be entered through it. Once the key is pressed, the microcontroller at the transmitter part detects that and transmits that through the RF signal. The receiver waits for transmitter to transmit the key press signal four times. Then according to the received data it process upon it and if it finds correct password then device is unlocks else alarm go on. This will lead to a significant development in the wireless device locking technology.
07-01-2011, 08:48 PM
Post: #11
RE: digital code lock full report
sir please send digital code lock full report
08-01-2011, 07:58 PM
Post: #12
RE: digital code lock full report
can you send me its working and pin diagram with details.

Please send it to my mail dhiraj.pathania90[at]gmail.com
10-01-2011, 11:14 AM
Post: #13
RE: digital code lock full report
previous pages are containing diagram and full report on digital code lock. please check it out.
05-02-2011, 10:10 PM
Post: #14
RE: full report on digital code lock
please send me a full report on digital code lock
please send me digital code lock working and pin diagram with details basedon AT89c2051

Please send it to my mail mohan123.sharma[at]gmail.com
12-06-2011, 08:08 PM
Post: #15
RE: digital code lock full report
hey can any of u plzz give me complete report on digital code lock....
25-06-2011, 08:37 PM
Post: #16
RE: digital code lock full report
hey, can u mail me the details (report) of this project tomorrow?...
thanks...

my email ad: leyn_sy25[at]yahoo.com
30-08-2011, 03:14 PM
Post: #17
RE: digital code lock full report

.zip  digilockasm.zip (Size: 17.46 KB / Downloads: 34)
This a simple project with efficient hacking prevention from Brute Force etc. The basic user lock is of 5 Digits and Master Lock is of 10 digits so its not easy for an intruder to break the lock unless you keep the code simple.
The input is taken from a 4×3 Keypad (please see the schematic for more information) and Display the user input on a 2×16 LCD. A pin is assigned as output for activating and deactivating the lock. For demonstration i have connected an LED to that pin.
30-08-2011, 03:36 PM
Post: #18
RE: digital code lock full report

.pdf  Digital Code Lock Schematic.pdf (Size: 19.25 KB / Downloads: 226)
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 digital lock for Doors 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.
11-12-2011, 07:07 PM
Post: #19
RE: digital code lock full report
I am in need of full document for digital code lock using AT89C2051
30-01-2012, 01:57 PM
Post: #20
RE: digital code lock full report
digital code lock


.ppt  batch 9 madhukar.ppt (Size: 812.5 KB / Downloads: 93)
.LCD:-


LCD is finding wide spread use replacing LEDs (seven segment LEDs or other multi segment LEDs)

A model described here is for its low price and great possibilities most frequently used in practice. It is based on the microcontroller and can display messages in two lines with 16 characters each


Features

Diffused Junction
Low Forward Voltage Drop A
High Current Capability
High Reliability
High Surge Current Capability B
Ideal for Printed Circuit Boards


voltage regulator

The MC78XX series of three terminal positive regulators are available in the TO-220/D-PAK package and with several fixed output voltages, making them useful in a wide range of applications.

4 Matrix Keyboard

4*4 matrix keyboard is used to enter password and to control devices, 4*4 matrix keyboard requires only 8 I/O lines, where as the line keyboard requires 16 I/O lines






digital code lock


.ppt  batch 9 madhukar.ppt (Size: 812.5 KB / Downloads: 93)
.LCD:-


LCD is finding wide spread use replacing LEDs (seven segment LEDs or other multi segment LEDs)

A model described here is for its low price and great possibilities most frequently used in practice. It is based on the microcontroller and can display messages in two lines with 16 characters each


Features

Diffused Junction
Low Forward Voltage Drop A
High Current Capability
High Reliability
High Surge Current Capability B
Ideal for Printed Circuit Boards


voltage regulator

The MC78XX series of three terminal positive regulators are available in the TO-220/D-PAK package and with several fixed output voltages, making them useful in a wide range of applications.

4 Matrix Keyboard

4*4 matrix keyboard is used to enter password and to control devices, 4*4 matrix keyboard requires only 8 I/O lines, where as the line keyboard requires 16 I/O lines
18-02-2012, 04:42 PM
Post: #21
RE: digital code lock full report
to get information about the topic digital code lock full report ppt and related topic refer the link bellow

http://www.seminarprojects.com/Thread-di...ull-report

http://www.seminarprojects.com/Thread-di...ort?page=2

http://www.seminarprojects.com/Thread-di...ort?page=3

http://www.seminarprojects.com/Thread-di...?pid=16689
26-02-2012, 11:18 AM
Post: #22
Wink RE: digital code lock full report
i want a ppt about this title "digital code lock full report"
05-03-2012, 10:17 AM
Post: #23
RE: digital code lock full report
to get information about the topic digital code lock full report ppt and related topic refer the link bellow

http://seminarprojects.com/Thread-digita...ull-report

http://seminarprojects.com/Thread-digita...ort?page=2

http://seminarprojects.com/Thread-digita...ort?page=3

http://seminarprojects.com/Thread-digita...ort?page=4

http://seminarprojects.com/Thread-microc...ock--21479
19-03-2012, 12:33 PM
Post: #24
RE: digital code lock full report
please send us full project report on digital control system micro controller based 8051.
thank youSmile
please send full project report on digital code lock system
19-03-2012, 03:48 PM
Post: #25
RE: digital code lock full report
digital code lock


.docx  DIGITAL CODE LOCK.docx (Size: 735.65 KB / Downloads: 54)

INTRODUCTION

A digital code lock is a device which has a digital control assembly attached to it by using AT89C51 microcontroller. They are provided with an access control system. This system allows the user to unlock the device with a password. The password is entered by making use of a keypad. The user can also set his password to ensure better protection.
A 4x3 matrix keypad and a 16x2 LCD have been used here. Keypad and LCD are very commonly used input & output devices, respectively. A four digit predefined password needs to be specified the user. This password is stored in the system.
While unlocking, if the entered password from keypad matches with the stored password, then the lock opens and a message is displayed on LCD. Also an output pin is made high to be used for further purpose.



POWER SUPPLY
Power supply is used to give 5v regulated constant power to our microcontroller. The main supply is 230v AC which firstly passed through step down transformer. And then after bridge circuit convert it in to DC voltage. Then after voltage regulating IC7805 is used to take 5v constant.
Capacitors are joined parallel to circuit to provide more stable DC. And this section is connected to giving a 5v supply for Digital Code Lock.


MICROCONTROLLER MODULE
I have used AT89C51 IC in this project. And programming is done in assembly language. For assembly programming command prompt is used. And as based on password detector we can use it as security purpose.
The connections in the circuit are as following: port P3 of microcontroller AT89C51 is used as data input port which is connected to data pins (7-14) of LCD. P2.5, P2.6 and P2.7 pins of microcontroller are connected to control pins RS, RW and EN of LCD. Port P1.0/3 & p2.0/3 is used to take input from keypad.
As the program starts, string ‘Enter New Password’ is displayed on LCD. The keypad is scanned for pressed digits one by one. Every time, row and column of the key pressed is detected and digit is displayed on LCD corresponding to the entered number. After the four digits are entered, the user is prompted to ‘Enter Password’ and again the input is taken through LCD. If the passwords do not match, a message is displayed to indicate ‘Incorrect; otherwise the user is prompted to unlock the device.
To unlock, user needs to ‘Enter Password’ through keypad. Again the keypad is scanned for pressed keys and corresponding digits are identified. The passkey is displayed on the LCD screen. After the four digits are entered, they are compared with the pre-set password. If all the four digits match with set password, LCD displays ‘Hi Sir’ and the lock output pin goes high. If the security code is wrong, ‘Incorrect’ is sent to be displayed on LCD and give massage that, how much trial left. The system gets locked if more than three attempts are made with wrong password to open the electronic lock and ‘-CODE BLOCKED-‘massage will display on screen. The system needs to be reset in such a case.



REGULATING IC7805


The L78xx Series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition, internal short-circuit protection that limits the maximum current the circuit will pass, and output transistor safe-area compensation that reduces the output short-circuit current as the voltage across the pass transistor is increased. However, it is recommended that the regulator input be bypassed with capacitor if the regulator is connected to the power supply filter with long lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high frequency characteristics to insure stable operation under all load conditions. A 0.33 μF or larger tantalum, Mylar or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulators input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead. The addition of an operational amplifier allows adjustment to higher or intermediate values while retaining regulation characteristics. The minimum voltage obtained with the arrangement is 2 V greater than the regulator voltage.
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Marked Categories : working of digital code lock, abstract for electronic code lock circuit, abstract digital lock code with lcd, electronic code lock with user defined password, project report on code lock, wireless keypad full report, ppt digital code lock with lcd and keypad using at89c2051 ppt, digital code lock, digital code locking system, coding for digital code lock using 8051, project report on digital lock code, project on digital lock, digital code lock project report pdf, wireless digital code lock with a status display project, report of digital code lock project, simple low cost digital code lock, digital lock project, abstract of 8 digit code lock for application,

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