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

59281

  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 Jul 20 2019, 05:38 AM
charmdatexvo
cooking
ExperimenterUK
Thu Jul 11 2019, 07:55 PM
@ramos https://www.theengineeringprojects.com/2017/09/l298-motor-driver-library-proteus.html
ExperimenterUK
Thu Jul 11 2019, 07:44 PM
@praveen123. Can you give a link to the project ?
Thu Jul 11 2019, 04:47 PM
ramos
buenos dias alguien podria ayudarme necesito saber como descargar la libreria del l298n para proteus
Thu Jul 11 2019, 11:11 AM
praveen123
anyone can help me
Thu Jul 11 2019, 11:11 AM
praveen123
i need source code for 8051 -smart trolley rfid
Thu Jul 11 2019, 11:10 AM
praveen123
hii
ExperimenterUK
Thu Jun 27 2019, 09:14 PM
Hi.. good to see you again
۞ TPS ۞
Thu Jun 27 2019, 07:31 AM
Hello
AdiGhazi
Tue Jun 18 2019, 11:21 AM
Hlo Dear , I've to program AT89C51AC3 RT-LUM using flip but I'm getting time out error for RS232. Will you please suggest me which programmer will be supportable to program this Chip.

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Comments

rpels7707
Fri Jul 19 2019, 11:31 AM
ameya123
Fri Jul 19 2019, 07:36 AM
anhsieuno
Thu Jul 18 2019, 11:39 AM
zxcvbnm1234
Sat Jul 13 2019, 07:09 AM
surajghayal
Wed Jul 10 2019, 01:17 PM
figureyang
Fri Jul 05 2019, 04:25 AM
mousompal
Sat Jun 29 2019, 05:02 PM
AdiGhazi
Tue Jun 18 2019, 11:15 AM

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Forum Activity
ameya123 Avatar
Posted By ameya123
Fri Jul 19 2019, 07:42 AM
Hello,Please share 8051 Assembly language code for...
figureyang Avatar
Posted By figureyang
Fri Jul 05 2019, 04:37 AM
here is the source code prepared for you download ...
figureyang Avatar
Posted By figureyang
Fri Jul 05 2019, 04:30 AM
Cheap_Flash_FS(Normal Version)--Embedded FAT16/32 ...
wimac Avatar
Posted By wimac
Sat Jun 22 2019, 01:26 PM
I’ve use the AT89C51ED2 which has a similar progra...
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Jun 20 2019, 10:08 PM
baud rate is 9600 at stop bits of 2. AdiGhaziThe u...
AdiGhazi Avatar
Posted By AdiGhazi
Thu Jun 20 2019, 05:24 AM
Dear,I'm using RS232 serial port cable to use flip...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Jun 18 2019, 10:19 PM
Okay.. I have never programmed the AT89C51AC3 or ...
AdiGhazi Avatar
Posted By AdiGhazi
Tue Jun 18 2019, 11:20 AM
Hlo Dear ,I've to program AT89C51AC3 RT-LUM using ...
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu May 30 2019, 08:32 PM
It occurs to me that although the P89LPC921 and P8...
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed May 29 2019, 09:05 PM
I would suggest a fresh approach.The Keil compile...