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

58684

  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

hareeshchamiyar
Thu Mar 29 2018, 10:47 AM
please help me for the configuration bits for dspic30f2010
hareeshchamiyar
Thu Mar 29 2018, 10:45 AM
can any one using dspic30f2010.
Thu Mar 29 2018, 06:03 AM
Neena
can anybody give solar tracking in 8051 using proteus and keil to mail [email protected]
ExperimenterUK
Mon Mar 19 2018, 07:33 PM
sorry bedo.. maybe next time
Sun Mar 18 2018, 07:48 AM
Mourya Manojkumar
Please send me circuit diagram and PCB diagram
Thu Mar 01 2018, 05:49 AM
Felixc
May you please help me with a code for programmable load shedding controlling 4 loads
Sun Feb 25 2018, 08:29 PM
ezeoke.charles
i need of it
Sat Feb 24 2018, 03:35 AM
Aaquib
I want help for digital ic tester
ExperimenterUK
Tue Feb 20 2018, 04:01 PM
Join up.. and post your problem
Mon Feb 19 2018, 11:17 AM
ashishkumar
i needs help for my project

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Pater
Fri Apr 20 2018, 02:38 PM
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Sat Apr 14 2018, 12:47 AM
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Sat Mar 31 2018, 02:11 PM
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Mon Mar 26 2018, 07:17 AM
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Sat Mar 24 2018, 12:31 PM
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Tue Mar 20 2018, 09:51 AM

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Fri Apr 20 2018, 02:40 PM
Actually I want to transmit 3 bits serially using ...
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Mon Apr 16 2018, 08:49 PM
On the diagram, a diode feeds a rectified sine wav...
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Hi sir i haven't connected any serial connec...
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I assume you are doing this project.http://www.805...
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hii sir,I am working on ac motor controller .I hav...
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The lpc214x has a 32-bit prescaler , so I would ...
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Hi,I'm generating constant frequency of 1hz and va...
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I have used diptrace.I think ı have recevied from ...
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You will need to say which software you are using,...
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I have drawed many PCB board. But it is still not ...