Basic Level     Skills: Not specified    
Author
Author email
[email protected]
Author website
www.8051projects.net

Description

Project tested and working perfectly

Digital Lock Using AT89C2051 with LCD and Keypad - Assembly

A Brief Description:
This project is a rewrite of previously made project "Digital Code Lock using keypad and LCD"
I got many requests from student's side who want this project in Assembly language. So i spent some time making this project.

You will find working of this project same as that of original project. Nothing has been changed as such.

Its 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 4x3 Keypad (please see the schematic for more information) and Display the user input 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.

User Side working:
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 (4x3) 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.

Download File Information:
LCD.asm - Project Code
LCD.hex - Final Hex file
Digital Code Lock Schematic - PDF file of orcad schematic

If any problem Please post in the forum
  Filesize

17.46 kB

  Downloads

55043

  Rating
 

Comments

nasima
30 Oct 2014: 11:54 AM
i want you to help me in a program for interfatcing hex key pad with8051 and then make a digital lock
Kindly guide me as to how to combine the two different programs. thanks
  
ajay_bhargav
02 Nov 2014: 07:10 AM
Just down the project and go through the code yourself. If you need help, just post a question. You can also look into our tutorial section for keypad tutorial.
  
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Conversation

ExperimenterUK
Thu Nov 20 2014, 06:00 PM
@Mehboob.. I don't think you can do that.
Sat Nov 15 2014, 06:41 AM
Mehboob
Pls can you send me code in c of PWM generation using UART/serial port in 8051.
Fri Nov 14 2014, 02:51 PM
mohammad aqil
NEED A BOOK ON MICROPROCESSOR AND INTERFACING BY D.V.HALL. RIGHT NOW, I SHALL BE VERY THANK FULL TO U....
Thu Nov 13 2014, 02:15 PM
m
please code hex project avr blood pressure monitor
Thu Nov 13 2014, 05:56 AM
Lambo
hi mate, whats the ajay-bhargav? tell us more pls
ExperimenterUK
Wed Nov 12 2014, 12:56 AM
@tmtm000.. have you been able to join ?
ExperimenterUK
Wed Nov 12 2014, 12:54 AM
@Alice..become a member,then send a PM to ajay_bhargav the site owner.
Tue Nov 11 2014, 03:58 AM
Abhishek Bansal
Thanks a lot for your informative tutorials!
Mon Nov 10 2014, 09:03 AM
Alice
Hello, This is Alice from a PCB rototype manufacturer. Our company is interested in your website contents, and wonder if we can advertise our company with payment on your website. There are two ways to advertise: first, if we an get a instant quote section on your main site columns; second, whether we can get a advertising section if you have any avaliable one. If any of above ways avaliable, please contact me with your detailed scheme and advertising charge. Thanks. Alice
Sat Nov 08 2014, 11:58 AM
Mohamed_123sd
Signals and Systems, 2nd Edition by Alan V. Oppenheim Alan S.willsky with S.Hamid Nawab?

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PsySc0rpi0n
Thu Nov 27 2014, 02:00 PM
hanifnoor
Thu Nov 27 2014, 09:42 AM
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Wed Nov 26 2014, 02:18 PM
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Tue Nov 25 2014, 05:13 PM
dodul
Mon Nov 24 2014, 10:08 PM
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Tue Nov 18 2014, 09:13 AM
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Sun Nov 16 2014, 11:13 PM
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Wed Nov 12 2014, 05:32 AM

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PsySc0rpi0n Avatar
Posted By PsySc0rpi0n
Thu Nov 27 2014, 02:30 PM
Hi...I'm new in forum and with programming 8051 co...
hanifnoor Avatar
Posted By hanifnoor
Thu Nov 27 2014, 09:45 AM
while(msg_array[i]!='\0') { if(msg_array[i]=...
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Posted By rearthur2003
Thu Nov 27 2014, 05:23 AM
there are two types of diodes ir rx which is coat...
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Posted By rearthur2003
Thu Nov 27 2014, 05:19 AM
First you will need to let us know what IDE you pl...
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Posted By engr1931
Thu Nov 27 2014, 05:18 AM
yes sir! i only know assembly, and still in proces...
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Posted By ExperimenterUK
Wed Nov 26 2014, 06:36 PM
I never tried sending SMS messages at a high rate,...
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Posted By ExperimenterUK
Wed Nov 26 2014, 06:23 PM
connected my modem with Laptop via serial2usb cabl...
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Posted By dodul
Wed Nov 26 2014, 04:30 PM
Hi,Thanks a lot for your reply. Yes i was referrin...
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Posted By nomi77
Wed Nov 26 2014, 07:30 AM
@ajayAnother option is this if i can do void stor...
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Posted By nomi77
Wed Nov 26 2014, 07:05 AM
@ajayI did same procedureconnected my modem with L...