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

56257

  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.
  
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Conversation

Sat Aug 01 2015, 05:57 AM
ghulamqadir
i want to communitcate wifi module with android phone using pic18f4550. Any Suggestion????????
Sat Aug 01 2015, 05:56 AM
ghulamqadir
Slam
ExperimenterUK
Thu Jul 30 2015, 11:41 PM
@Muhammad Aarshad build what ?
Wed Jul 29 2015, 06:42 PM
Muhammad Aarshad
Hello I want to build it, but I don't know how can I program the micro controller. Can You send me the code of the IC? Thanks in advance My e-mail: [email protected]
Sat Jul 25 2015, 10:37 PM
Arnali
What does the cross means? The ones from pin 7,8,9,10 of the LCD?
Fri Jul 24 2015, 09:53 AM
HARSHAL PATIL
....
shyam
Thu Jul 23 2015, 01:42 PM
hi Ajay
ajay_bhargav
Mon Jul 20 2015, 04:38 AM
@Rohit Biradar, I am glad my tutorial helped
Thu Jul 16 2015, 06:19 PM
Rohit Biradar
Thanks a lot publisher of this tutorial. Everybody tells about the nibble sending methods and the command set for 4-wire lcd interface. You are the first to tell me about the most important part that is resetting the lcd. This thing got me all day. Now I can sleep in peace. Thanks once again. Million thanks.
Thu Jul 16 2015, 12:24 PM
Baby
my project is related to control the door in dam. by keil program how can i control the same.

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Comments

albatain
Fri Jul 31 2015, 02:58 AM
KDN
Wed Jul 29 2015, 05:14 AM
Tanvir.
Fri Jul 24 2015, 07:59 AM
erummumtaz
Thu Jul 23 2015, 10:47 PM
balvant
Thu Jul 16 2015, 03:56 PM
seoulmak
Mon Jul 13 2015, 01:21 PM
SHIVKHUMAR
Sat Jul 11 2015, 04:10 AM
Nals99
Fri Jul 03 2015, 08:33 AM

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Forum Activity
Mc_Comet32 Avatar
Posted By Mc_Comet32
Sun Jul 26 2015, 05:49 PM
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Jul 23 2015, 08:14 PM
Try this link.Basically find the tacho output pin...
seoulmak Avatar
Posted By seoulmak
Mon Jul 20 2015, 03:44 PM
ajay_bhargav Avatar
Posted By ajay_bhargav
Mon Jul 20 2015, 04:42 AM
Ok then, check if you did not mention "LCD_ClearSc...
ajay_bhargav Avatar
Posted By ajay_bhargav
Mon Jul 20 2015, 04:41 AM
I am assuming you're talking about the small CPU f...
ajay_bhargav Avatar
Posted By ajay_bhargav
Mon Jul 20 2015, 04:36 AM
Amit Kumar Das Avatar
Posted By Amit Kumar Das
Sun Jul 19 2015, 04:17 AM
Yes they are fine. I have included everything. Una...
seoulmak Avatar
Posted By seoulmak
Fri Jul 17 2015, 08:41 AM
yes, but i need more information to connect the f...
balvant Avatar
Posted By balvant
Thu Jul 16 2015, 04:07 PM
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed Jul 15 2015, 05:42 PM
Is this a project listed on this site ?