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

59589

  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.
  
navig
24 Apr 2015: 18:24 PM
sir in the above shown program where are you going to dtore new password.
as you have not shown any memory ic
  
ajay_bhargav
29 Apr 2015: 18:55 PM
@navig, This project does not store password in non-volatile memory. It just stores the password in RAM and if controller resets password also resets. You can add an EEPROM to add saving password to EEPROM.
  
Muhammad Ahmad
05 May 2016: 11:50 AM
Sir. kindly upload the proteus file. i want to complete schematic diagram. thank you
  
SULTHAN
17 Dec 2017: 16:24 PM
HOW TO CHANGE THE LOCK CODE
  
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Conversation

Sat Jan 18 2020, 08:49 AM
Elma
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Sat Jan 18 2020, 07:24 AM
Charles Halfey
Kind Regards,
Tue Jan 14 2020, 07:08 AM
shubham kharade
when i am trying to simulate the program in Proteus 8 professional, I am getting some errors as cannot find module file dhtxx.md can u help me
Tue Dec 17 2019, 01:44 PM
Devangi
hello..i am programming industrial timer using 8051 with 24lc64 eeprom. i have query in storing the 3 diff value in eeprom with enter button. can anyone share c code ?
Tue Dec 17 2019, 10:30 AM
Andrius
Hello. Can anyone share the code in Bascon and scheme in Proteus?
Thu Nov 21 2019, 12:30 PM
raj2555
how to interface 8051 microcontroller with NRF24L01+ module
ExperimenterUK
Sat Oct 12 2019, 10:23 PM
Log in.. then post your code in the 8051 forum
Sat Oct 12 2019, 10:18 AM
Bhadra Sajikumar
i am doing a countdown timer with 8051 for my project, unfortunately our professor had to take a leave of absence before he could teach us most of it.. can someone explain the .asm code of it for me?
Mon Sep 23 2019, 07:37 AM
Nathaniel
I am doing a project for my schools wireless security system with cameras,sensors and spot lights using 8051 micro controller, could you help me out with the design and its source code.
Wed Sep 18 2019, 08:48 PM
Caryn Kover
Thank you for your time,

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Comments

usb5962
Sat Jan 11 2020, 10:42 AM
elt
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Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Fri Jan 17 2020, 10:24 PM
We will need the circuit diagram.A Proteus simulat...
Billz Avatar
Posted By Billz
Sat Jan 11 2020, 05:43 PM
hi everyone please attached files are my c code fo...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Jan 07 2020, 08:18 PM
Not a stupid question.Setting up "Eclipse" can be...
elt Avatar
Posted By elt
Tue Jan 07 2020, 07:06 PM
So i have just began learning programming micros a...
Billz Avatar
Posted By Billz
Mon Jan 06 2020, 09:22 PM
I think it would be better if you guys try to come...
ExperimenterUK Avatar
Posted By ExperimenterUK
Mon Jan 06 2020, 12:22 AM
Can you post a circuit diagram and any code you ha...
Billz Avatar
Posted By Billz
Sun Jan 05 2020, 08:17 PM
Need help regarding C code (specifically for PIC 1...
ExperimenterUK Avatar
Posted By ExperimenterUK
Mon Dec 30 2019, 06:42 PM
Can you give more details of your problem.
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Posted By Rupeshpatil
Fri Dec 27 2019, 06:21 PM
How to copy program my old microcontroller to new ...
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Posted By ilylily07
Thu Dec 12 2019, 02:26 PM
wil do.thank you for your advice!