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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

70126

  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.
  
srikar
09 Apr 2015: 01:40 AM
hello sir can u please help me i need proteus code for this digital code lock
vl u pls mail me
  
ajay_bhargav
10 Apr 2015: 18:22 PM
@Srikar, code is provided in the zip file. there is no separate code for proteus. Post in forum for further questions.
  
astro
26 Jul 2015: 01:40 AM
Should I just be burning the main.c function onto the microcontroller? What are the other files for?
  
krizza
24 Aug 2015: 02:34 AM
could you pleas help me to create this project for our final grading @ AT89C2051
  
ajay_bhargav
27 Aug 2015: 07:16 AM
@krizza, Please download the project and build it. I have also provided hex file incase you do not have compiler.
  
tabrej
22 Sep 2015: 08:14 AM
admin sir please send me the source code of password based door lock system...i m trying from 2 month. still not get success on it.
so please help me sir
  
ajay_bhargav
29 Sep 2015: 21:53 PM
@tabrej, Click on the download file button to get the zip file containing code and schematic. Post in forum if you need any help.
  
h-shahsavar
23 Nov 2015: 04:59 AM
its very interesting
thanks
  
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Conversation

Fri Feb 05 2016, 08:33 AM
SANJYOT JADHAV
sir did we have to use Gsm modem for testing the circuit on proteus
Tue Feb 02 2016, 11:17 AM
upendra kumar
i want information about 3-phase motor control using gsm technology
Sat Jan 16 2016, 05:33 PM
Kenneth Etuk
Hi everyone, I need help with a project involving MCU,rttc, and DC motor. I will pay for it. please reply to my mail [email protected] if you are interested. thanks
ExperimenterUK
Sat Jan 16 2016, 02:08 AM
@Kabona Log in and create a thread. Tell us what you want to do
Tue Jan 12 2016, 08:24 PM
Kabona
how can I make my pc be input and output device for the microcontroller
Sat Jan 09 2016, 07:04 AM
Ravz
Thank u..... one more doubt Will ultrasonic sensor HC-SR04 works with aurdino board in operating system linux
Tommy.Kofisterix
Fri Jan 08 2016, 08:50 PM
I know it detects also the mud on rear bumper, this means other obstacles will
Tommy.Kofisterix
Fri Jan 08 2016, 08:48 PM
Hey hi, hello
Tue Jan 05 2016, 03:03 PM
Ravz
Anybody here????
Tue Jan 05 2016, 02:52 PM
Ravz
Will ultrasonic sensors detect obstacles when cloth or any other objects covers the sensor????

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Comments

designAAA
Sat Jan 30 2016, 08:49 AM
syavash_kasraeee
Sat Jan 16 2016, 05:54 AM
hamudi
Thu Jan 07 2016, 04:40 AM
Spandan89
Tue Jan 05 2016, 04:06 PM
siimao
Thu Dec 24 2015, 04:00 PM
moinabbasqureshi
Thu Dec 17 2015, 03:35 PM
dodo
Tue Dec 15 2015, 11:36 AM
embeddedashish
Thu Dec 10 2015, 12:50 PM

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Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Feb 04 2016, 04:10 AM
Sir I didn't understand that. Could you explain ab...
sankalp_s Avatar
Posted By sankalp_s
Tue Feb 02 2016, 07:26 PM
but good use of sub routines will save a lot of ...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Feb 02 2016, 12:25 AM
after removing ALLON instruction it's working fine...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Feb 02 2016, 12:14 AM
Which micro controller are you using ?.Does it hav...
sankalp_s Avatar
Posted By sankalp_s
Sat Jan 30 2016, 07:40 PM
You need to explain exactly what you want the code...
ExperimenterUK Avatar
Posted By ExperimenterUK
Sat Jan 30 2016, 06:57 PM
>sir can you code this in any other method?You nee...
sankalp_s Avatar
Posted By sankalp_s
Sat Jan 30 2016, 06:47 PM
CALL ALLONCLR L1CLR L2CLR L3CLR L4CALL DELAY ;del...
designAAA Avatar
Posted By designAAA
Sat Jan 30 2016, 10:03 AM
I have used to timer 2 external pin for other purp...
designAAA Avatar
Posted By designAAA
Sat Jan 30 2016, 09:00 AM
Hello,I am building the dotmatrix display, where I...
ExperimenterUK Avatar
Posted By ExperimenterUK
Sat Jan 30 2016, 12:40 AM
ok sir but what is solution for it. will i have to...