Basic Level     Skills: Not specified    
Author
Author email
[email protected]
Author website
www.8051projects.net

Description

Project tested and working perfectly

Digital Code Lock with LCD and Keypad using AT89C2051

A Brief Description:
This project is written in C language. 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.C - 4-Bit LCD Drivers
LCD.H - LCD function prototypes and other declerations
Lock.C - code for lock functioning
LOCK.H - lock function declerations
KEYPAD.C - Keypad drivers
KEYPAD.H - Function declerations
DELAY.C - Delay Functions
DELAY.H - Function Prototypes only
MAIN.C - Main function!
Digital Code Lock Schematic - PDF file of orcad schematic

If any problem Please post in the forum
Tags Digital Code LockDigital door lock projectdoor lock keypadprogrammable door lock8051 door lock project8051 digital lock
  Filesize

20.16 kB

  Downloads

66473

  Rating
 

Comments

geethika
17 Jul 2014: 10:32 AM
Sir iam unable to run the code in proteus....after displaying "Enter Lock Code : " it is not taking the input from keypad and is doing nothing.
help me.
thanku and regards.
  
ajay_bhargav
21 Jul 2014: 05:20 AM
Geethika, can you post your problem in forum with proteus schematic?
  
sufiyan
28 Aug 2014: 16:38 PM
can you please tell me what type of lock activator i can use in place of led???
  
sufiyan
29 Aug 2014: 08:31 AM
please can you tell me which type of lock activator should i connect in place of LED? can i use selenoid lock actuator
  
ajay_bhargav
30 Aug 2014: 16:11 PM
You can make use of Solenoid lock.
  
vikshit
12 Sep 2014: 06:02 AM
Sir iam unable to run the code(lock.hex) in proteus....after displaying "Enter Lock Code : " it is not taking the input from keypad and is doing nothing.
help me.
  
breadman
16 Sep 2014: 06:03 AM
sorry but at89c2051 have <5kb flash. is it possible to install the lock.hex on this ic ? sorry for my bad english.
  
ajay_bhargav
17 Sep 2014: 05:02 AM
@Vikshit, Check your keypad connections. Try swapping Rows and Columns. If you still face issue post in forum.

@breadman, hex file always have more size than the actual binary code as hex is in ascii. Programmer software converts hex to binary before loading. You should not have any issue installing hex file in IC.
  
breadman
17 Sep 2014: 05:49 AM
ok, thanks for explaining. what compiler are you using for compiling main.c ?
  
ajay_bhargav
01 Oct 2014: 06:42 AM
Code is written for Keil.
  
breadman
06 Oct 2014: 10:20 AM
Thank you very much sir. The program was running very well on at89s51.
  
FARYAL
12 Nov 2014: 18:41 PM
the lcd is not showing the pasword i am entering plus is not doing anything after that
  
ajay_bhargav
14 Nov 2014: 05:16 AM
@FARYAL, check your keypad connections. if you have any doubts please post in forum.
  
sufyan
27 Dec 2014: 16:31 PM
can we use this code in AT89S52 instead of AT89C2051 ....
  
ajay_bhargav
06 Jan 2015: 04:39 AM
@sufyan, Yes you can use AT89S52. Just keep the same port pins.
  
haishbhat
12 Feb 2015: 11:16 AM
sir plz send the source code to my e mail.plzzzz
  
ajay_bhargav
13 Feb 2015: 04:45 AM
@haishbhat, please use the download button.
  
vinothkumar
25 Mar 2015: 12:40 PM
sir i want abstract for digital code lock using at89c2089.
  
ajay_bhargav
29 Mar 2015: 19:31 PM
@vinothkumar, I don't think it will be hard to write few words on the project as simple as a digital lock. Please do prepare an abstract and share it with us. We will add it to this project as your contribution.
  
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Conversation

Mon Mar 30 2015, 04:51 PM
Peter james
can any one provide me an assembly language program to interface with 16x2 LCD, 4X4 Keypad and a GSM Module to recieve message and display it.
ajay_bhargav
Mon Mar 23 2015, 04:22 AM
You can only simulate simple 8051. RD2 support is not there in proteus. However there are similar atmel varient which can be used instead.
Sun Mar 22 2015, 07:24 PM
Aryan Nath
How can i Simulate microcontroller project in Proteus that uses P89V51RD2
Thu Mar 19 2015, 02:45 PM
Peter Mann
I have tried to register on the site, but it keeps saying I've entered two different email adresses - but I haven't!
ajay_bhargav
Sun Mar 15 2015, 08:25 PM
I did not get new message indication.. strange..
ExperimenterUK
Sun Mar 15 2015, 08:18 PM
slight delay, my connection failed
ajay_bhargav
Sun Mar 15 2015, 08:08 PM
Atleast you chat on our website if not anywhere else
ajay_bhargav
Sun Mar 15 2015, 08:08 PM
Hi Phil..
ExperimenterUK
Sun Mar 15 2015, 08:05 PM
Hi Ajay
gsdvprasad
Fri Mar 13 2015, 04:20 PM
Can you help me how to change the text on led display in proteus simulation?

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Comments

harix
Sun Mar 29 2015, 07:11 PM
marti
Fri Mar 27 2015, 03:07 PM
iamalien
Thu Mar 26 2015, 07:27 AM
Ankit30
Wed Mar 25 2015, 02:35 PM
wai1023
Wed Mar 25 2015, 06:27 AM
StrangerDanger
Tue Mar 24 2015, 12:40 PM
vinayas9
Tue Mar 24 2015, 09:26 AM
ganesh1991
Tue Mar 24 2015, 08:22 AM

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Forum Activity
diana1234 Avatar
Posted By diana1234
Mon Mar 30 2015, 08:12 AM
Dear sir,How a resistor can be used as a current l...
ExperimenterUK Avatar
Posted By ExperimenterUK
Mon Mar 30 2015, 05:13 AM
The processor on the MCB2300 has a built in DAC.Cr...
iamalien Avatar
Posted By iamalien
Sun Mar 29 2015, 07:46 PM
yes either that or use the flash reprogrammable va...
ajay_bhargav Avatar
Posted By ajay_bhargav
Sun Mar 29 2015, 07:37 PM
Correct, you cannot change ROM, but you can still ...
iamalien Avatar
Posted By iamalien
Sun Mar 29 2015, 07:25 PM
i am using at89s52 i guess it is only isp not iap,...
ajay_bhargav Avatar
Posted By ajay_bhargav
Sun Mar 29 2015, 07:22 PM
Ianalien is right. But you can do this without usi...
ajay_bhargav Avatar
Posted By ajay_bhargav
Sun Mar 29 2015, 07:19 PM
EEPROM can be changed at runtime. Program memory c...
ajay_bhargav Avatar
Posted By ajay_bhargav
Sun Mar 29 2015, 07:11 PM
We have digital clock project with 4 line lcd. It ...
ajay_bhargav Avatar
Posted By ajay_bhargav
Sun Mar 29 2015, 07:07 PM
It may be possible that interrupt pin may be used ...
ajay_bhargav Avatar
Posted By ajay_bhargav
Sun Mar 29 2015, 06:58 PM
As per majoka, if you have installed the crack pro...