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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

54693

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Conversation

ExperimenterUK
Sat Sep 13 2014, 04:34 PM
jaimin1212,Pimpalkhare Create a thread for your question
jaimin1212
Sat Sep 13 2014, 06:35 AM
i want to make self balancing robot using MPU6050 using atmega8.. please help to get data of gyro and accelerometer from this sensor through atmega8.
Thu Sep 11 2014, 01:00 PM
Sunil Pimpalkhare
Hello sir, I am trying to make Wearfin project https://www.youtube.com/watch?v=iZ6PVBvQf-g so can u help me in teaching how to built the program???
Thu Sep 11 2014, 06:21 AM
hariom panday
plz hlp me in my project
iec.naga
Tue Sep 09 2014, 05:19 AM
spi
Mon Sep 08 2014, 12:14 PM
fameem
water changing in fish tank automatically using microcontoller with timer. send idea to me
dexter_a
Sat Sep 06 2014, 03:09 PM
hello guys
Sat Sep 06 2014, 02:10 PM
munaxa
plx guide me
Sat Sep 06 2014, 02:09 PM
munaxa
hi i want to buy plx guie me
ajay_bhargav
Sat Sep 06 2014, 07:10 AM
@Ben, Its hard to undrstand the context like this. If you can post in forum with some example code we might answer you better.

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Comments

engwas
Tue Sep 30 2014, 12:42 PM
zsachico
Tue Sep 30 2014, 04:18 AM
evergreencare
Sat Sep 27 2014, 07:39 AM
Agnoor
Thu Sep 25 2014, 06:39 AM
fouadzeyad
Tue Sep 23 2014, 09:04 AM
deepbhadani
Fri Sep 19 2014, 05:08 PM
desaiakshay92
Fri Sep 19 2014, 04:45 AM
Fiddu
Thu Sep 18 2014, 06:28 AM

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Sat Sep 20 2014, 04:35 AM
Hello All,I want to connect normal speaker (as a s...
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Wed Sep 17 2014, 04:59 AM
I think its important to list out the features of ...
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Wed Sep 17 2014, 04:45 AM
you need to put a wait condition in ISR till the s...
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which compiler are you using? I suggest XC8 with M...
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