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

58783

  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
  
(Required; Min length 5)
(Required; will not be displayed)

Conversation

Sun May 20 2018, 10:01 AM
justinb
how to write and execute a program that read the keypad button and display the number on 7 segment on intel8051 at89s52 in assembly language?
Thu May 17 2018, 06:36 AM
HAMZA TAJ
sir iwant to ask about controller of three phase supply by using back to back thyristor instead of triac....will u give me some guideline?
Sat Apr 28 2018, 12:54 PM
ashutosh jain
IR Remote Switch using TV remote (RC5 Protocol) is not working properly. opp1 & opp2 is in problem.plz help
ExperimenterUK
Fri Apr 27 2018, 08:09 PM
@kaiserslautern Post in forum
Wed Apr 25 2018, 07:09 AM
kaiserslautern
Hello everyone, using software uart is a very good idea for a second serial port. Thank you so much. I would kindly like to know how to connect this port to the PC?
ExperimenterUK
Sat Apr 21 2018, 07:50 PM
This is a community site. Feel free to help anyone needing advice
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

Downloads

Comments

bdmehta
Tue May 22 2018, 02:30 AM
kmag1953
Sun Apr 29 2018, 07:09 PM
udiwonder
Sat Apr 28 2018, 12:41 PM
pirpiri
Sat Apr 21 2018, 03:35 PM
Pater
Fri Apr 20 2018, 02:38 PM
jamiel
Sat Apr 14 2018, 12:47 AM
akrepkral76
Wed Apr 04 2018, 07:51 PM
samanthaeaves
Mon Apr 02 2018, 06:27 AM

Online

Guests: 52, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 05:37 AM

Members: 37998
Newest member: bdmehta
Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Sat Jun 16 2018, 11:33 PM
hi sir sorry for the late reply sir can we control...
LAMBO Avatar
Posted By LAMBO
Sat Jun 16 2018, 07:15 AM
hi sir sorry for the late reply sir can we control...
ExperimenterUK Avatar
Posted By ExperimenterUK
Mon May 14 2018, 10:17 PM
So the main problem is that I am not getting Analo...
ExperimenterUK Avatar
Posted By ExperimenterUK
Mon May 14 2018, 09:40 PM
Hi sir after checking all the connection i...
Pater Avatar
Posted By Pater
Mon May 14 2018, 05:36 PM
Basically my project is based on Data Acquisition ...
LAMBO Avatar
Posted By LAMBO
Sun May 13 2018, 02:13 PM
Hi sir after checking all the connection i...
ExperimenterUK Avatar
Posted By ExperimenterUK
Mon May 07 2018, 07:27 PM
This design should be fine.Choose a frequency betw...
Pater Avatar
Posted By Pater
Mon May 07 2018, 01:28 PM
Sorry for late reply as exams were on,Based on my ...
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu May 03 2018, 03:32 PM
If the circuit works with a light bulb, the probl...
LAMBO Avatar
Posted By LAMBO
Thu May 03 2018, 08:04 AM
Hi sir as u mentioned above everthing is working...