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

59386

  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

Sun Oct 13 2019, 03:02 AM
Aline Hutchinson
Hey there,
ExperimenterUK
Sat Oct 12 2019, 11:23 PM
Log in.. then post your code in the 8051 forum
Sat Oct 12 2019, 11:18 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, 08:37 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, 09:48 PM
Caryn Kover
Thank you for your time,
ExperimenterUK
Mon Aug 05 2019, 08:09 PM
@Ismail ..post in forum, give details
Mon Aug 05 2019, 05:33 PM
Ismail balghmi
Hello. Please I won't download
ExperimenterUK
Wed Jul 24 2019, 01:47 AM
@BUSTER123 Please post in the forum
Tue Jul 23 2019, 07:13 PM
BUSTER123
hello! newbie here. i am kind of a guy who hates using ready - made existing libraries, so this helped a lot as i was trying to control and write to a character lcd display. however, i can't figure out how to set the cursor position. for example, i want to set it to the 5th column in the first row, so position 5. so according to the table, i am sending 10000101 on the 8 data lines of the lcd (register select pulled low). the cursor does not move there however. and i cant move the cursor left or right too. is it something wrong that i am doing? thank you.
ExperimenterUK
Thu Jul 11 2019, 08:55 PM
@ramos https://www.theengineeringprojects.com/2017/09/l298-motor-driver-library-proteus.html

Downloads

Comments

ilylily07
Tue Oct 15 2019, 04:32 PM
hientran123
Tue Oct 15 2019, 02:27 AM
Sat Oct 05 2019, 02:38 PM
zexalo
Thu Oct 03 2019, 09:53 AM
thanhle12345
Thu Oct 03 2019, 07:37 AM
ramon_vsc
Fri Sep 20 2019, 04:53 PM
youssoufba
Thu Sep 19 2019, 11:57 AM
Taiphan000
Tue Sep 17 2019, 04:21 AM

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Forum Activity
s_dinesh40@yahoo.com Avatar
Posted By [email protected]
Thu Oct 17 2019, 09:38 PM
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Oct 17 2019, 08:35 PM
Do you understand how this code works?If so, addin...
s_dinesh40@yahoo.com Avatar
Posted By [email protected]
Thu Oct 17 2019, 09:30 AM
i want to scroll message more than 2 dot matrix di...
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed Oct 16 2019, 09:58 PM
What do you mean by "message scroll vertically" ?...
s_dinesh40@yahoo.com Avatar
Posted By [email protected]
Wed Oct 16 2019, 07:38 AM
s_dinesh40@yahoo.com Avatar
Posted By [email protected]
Wed Oct 16 2019, 07:13 AM
message scroll vertically, please share code.
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed Oct 16 2019, 01:10 AM
Which camera ?What do you want the micro to do ?
ilylily07 Avatar
Posted By ilylily07
Tue Oct 15 2019, 04:43 PM
i need help.i don't know how to do it.is it possib...
ExperimenterUK Avatar
Posted By ExperimenterUK
Sun Oct 13 2019, 06:10 PM
This code does some scrolling.You will need to fin...
ExperimenterUK Avatar
Posted By ExperimenterUK
Sat Oct 12 2019, 10:19 PM
This code does not scroll, that will be complicate...