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

59044

  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

ExperimenterUK
Mon Jan 07 2019, 09:01 AM
@REVOCATUS please post in the AVR forum
Mon Dec 24 2018, 02:55 PM
REVOCATUS MATEMU
sorry I mean referee boards for player substitution
Mon Dec 24 2018, 02:54 PM
REVOCATUS MATEMU
hi am.looking how to build referee by using Atmega 328 and its codes
Sat Dec 15 2018, 07:15 PM
Arslan ayoub
Hii ,, can I get the simulation of numeric keypad lock on proteus
ExperimenterUK
Mon Dec 03 2018, 10:47 PM
Please post questions in the forum. The chat box is for chat
Mon Dec 03 2018, 12:13 PM
help!me!
help! I don't understand busy flag!
Mon Dec 03 2018, 01:31 AM
ile
hello
Mon Nov 12 2018, 11:28 AM
Pavan_user
i have seen your replica of I2C programming using AT89C51 but i am unable to understand the "ack_bit" variable usage ...looks like it is always 1...can you elaborate how acknowledgment is working....
bgk3678
Tue Nov 06 2018, 08:06 PM
kindly any one give solution for my problem
ExperimenterUK
Tue Nov 06 2018, 03:18 AM
Pins high is the normal state. You need a program to set them low

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garfield0929
Sun Jan 20 2019, 12:48 AM
servprov
Thu Jan 17 2019, 06:44 AM
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Wed Jan 16 2019, 04:21 PM
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Wed Jan 16 2019, 04:04 PM
SONACHAI1234
Sun Jan 06 2019, 08:14 AM
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Tue Jan 01 2019, 07:58 AM
etech
Sun Dec 30 2018, 07:44 PM
NeilC
Sun Dec 23 2018, 07:39 PM

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Posted By ExperimenterUK
Sun Jan 06 2019, 10:37 PM
Which 8051 chip are you using ?
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Posted By SONACHAI1234
Sun Jan 06 2019, 08:21 AM
Hi,By mistakenly i burn rx program in my 8051 micr...
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Wed Dec 19 2018, 06:27 PM
Nobody knows?sifirsekizThe problem is that you are...
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Sun Dec 16 2018, 11:13 PM
Guys pleaseeeee :((
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Posted By sifirsekiz
Sat Dec 15 2018, 07:09 PM
HiThe pulse-sensor-amped has an analogue output.Th...
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Posted By ExperimenterUK
Sat Dec 15 2018, 07:01 PM
HiThe pulse-sensor-amped has an analogue output.Th...
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Sat Dec 15 2018, 09:02 AM
and ı have pulse sensor one out but anolog use 805...
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Sat Dec 15 2018, 08:56 AM
HiMembers can supply code and diagrams if they wan...
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