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

60036

  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

Thu Jun 11 2020, 06:27 AM
anudee
sir could please send the code for I2C and wifi interfacing with 8051
scena
Tue May 19 2020, 10:29 PM
Does anyone have microcontroller programming software for STC15F104W (core 8051, 4 k, 128 byte, 6 I/O pin, UART ... DIL8), that works?
Sat May 02 2020, 07:38 PM
Tamu Gurung
Hi I am looking for a assembly language program for a digital decimal counter. Time counts max limit of 2 mins starting from 2.00 mins and ending at 0.00. time is to be displayed on 4 7-segment LED displays. Edsim51 simulator to be used. Thanks
Wed Mar 25 2020, 01:39 PM
Tajammul
Sir kindly send the code file i2c for 8051
ExperimenterUK
Fri Mar 13 2020, 10:36 PM
@ Rohitnani,ABEBE..which project ?
Fri Mar 13 2020, 12:55 PM
ABEBE
how can get hadwere of this project
Rohitnani
Sat Mar 07 2020, 05:11 PM
Sir, Could you please send me the zip file input password....
Wed Feb 26 2020, 04:58 PM
Peter Parker
Is it possible to send multiple messages using only 1 GSM module?
Sat Feb 01 2020, 10:12 AM
Pearl Olin
Hello,
Wed Jan 22 2020, 06:16 PM
MINU CHAUDHARY
I m getting errors while simulation process during interfacing socket output and lcd... Can i get the report of ur project which is same as us.

Downloads

Comments

Mirza123
Thu Jun 25 2020, 03:46 PM
eunicelove124
Mon Jun 22 2020, 03:03 PM
cerouno
Tue Jun 16 2020, 05:10 PM
Marce
Sat Jun 13 2020, 09:43 PM
Davidthils
Thu May 21 2020, 12:44 PM
Jakeror
Thu May 21 2020, 01:28 AM
motorCar
Wed May 20 2020, 07:05 PM
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Wed May 20 2020, 11:52 AM

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