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Author email
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Description

Combination Lock with LCD and Keypad using pic16f628A:

A Brief Description:

This project is written in C language. The basic user lock is of 2 Digits.
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.


How combination lock works:

1. Turn switch on (5V DC voltage power supply)
2. A message name “Combination Lock” will display on LCD at first row,
3. Second row display “Enter Pass:” it asked you to enter password for open doors.
4. In this lock design it has three doors. These are the code locks to open doors “door1=05, door2=28, door3=82, door1 & door2 = 33”.
5. If you entered one of the codes in step 4 then press enter key that door will open. For example, you enter 05 for door 1 it’s then open and close door 1 after 5 seconds.
6. If codes you entered are not matched one of the code in step 4 then led door is not turn on.
7. If your first attempt failed the message “invalid code’ display on screen.
8. Then you pressed any key to clear and you can try for second attempt.

After you have reached three attempts but you have not entered correct password. Next Any Keys press alarm will activate for 5 seconds.

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:

Flowchart.jpg
Combination_lock.c
Diagram bitmap.bmp
Lock_EBES_MODEL.DSN ( Using Proteus to run this file)
Combination_Lock.hex
Tags PIC digital lockpic microcontroller combination lockcombination lock projectPIC microcontroller digital lockdigital lock using pic micro
  Filesize

70.27 kB

  Downloads

62058

  Rating
 

Comments

hasitha
21 Jul 2014: 19:30 PM
what compiler use to write this project codes? How can i edit this code?
  
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Conversation

Sat Jan 31 2015, 11:17 AM
Pradeep Singh
I'm using 8051 microcontroller and want to configure HC-06 with it but I'm not able to find out what problem is occuring as my blueethooth is getting connected but no communication between blwutooth and pc/andriod phone
sachinmm
Sat Jan 31 2015, 05:23 AM
hello sir,i ask the question related to 7 segment display plz help me.
Thu Jan 29 2015, 11:24 AM
durai
I found discussion relevant to my problem (link:http://www.8051projects.net/t59199/gsm-cdma-discussion/flashing-new-firmware-in-sim900-modem.htm) but i could not find the project mentioned in that discusion
Thu Jan 29 2015, 11:21 AM
durai
Hi i am using a SIM/900A GSM modem, I want to send email with an attachement using a microcontroller but when i try to use AT_Email commands it gives me error,I think modem doesnot support those commands,is there any other way to send mail using that modem??
ajay_bhargav
Thu Jan 29 2015, 06:54 AM
@gaurav, please mail me message you're trying to post.
ExperimenterUK
Thu Jan 29 2015, 01:17 AM
bhagyesh.bhavasar/gaurav.k I can post with Firefox. Can you try other browsers ?
naqirizvi
Wed Jan 28 2015, 08:08 AM
the web theme is too much buggy and heavy , admin please change it to simple theme, so that user can browse quickly
naqirizvi
Wed Jan 28 2015, 08:07 AM
some one please share software name or ebooks related to avr
bhagyesh.bhavasar
Tue Jan 27 2015, 11:06 AM
i want to share my project but there is problem occurred during postng
bhagyesh.bhavasar
Tue Jan 27 2015, 05:58 AM
@ExperimentalUK i have used that purple button but same as previous it takes me to blank page

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sachinmm
Thu Jan 29 2015, 07:09 AM
nawfel
Sat Jan 17 2015, 07:27 AM
Rohi123
Sat Jan 10 2015, 11:00 AM
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Fri Jan 09 2015, 08:55 PM
Nikita_Pinjare
Thu Jan 08 2015, 03:10 PM
mayank058
Wed Jan 07 2015, 05:43 AM
Overeating
Tue Jan 06 2015, 05:56 AM
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Sun Jan 04 2015, 07:42 AM

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Forum Activity
sankalp_s Avatar
Posted By sankalp_s
Fri Jan 30 2015, 05:40 PM
you need to remove jump statements from main progr...
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Posted By mayank058
Fri Jan 30 2015, 07:02 AM
dear sir, please tell me how to do t...
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Posted By ExperimenterUK
Thu Jan 29 2015, 10:41 PM
T he P89V51RD2 P1.5, P1.6, P1.7 has extra curren...
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Posted By ExperimenterUK
Thu Jan 29 2015, 06:45 PM
@naqirizviAs you already have a thread running I t...
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Posted By naqirizvi
Thu Jan 29 2015, 02:11 PM
Circuit diagram i am following i am not sure is it...
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Posted By naqirizvi
Thu Jan 29 2015, 02:11 PM
Circuit diagram i am following i am not sure is it...
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Posted By naqirizvi
Thu Jan 29 2015, 02:11 PM
Circuit diagram i am following i am not sure is it...
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Posted By naqirizvi
Thu Jan 29 2015, 01:50 PM
Hi,I am new to programming got some issues in RFID...
sachinmm Avatar
Posted By sachinmm
Thu Jan 29 2015, 07:21 AM
hello sir, plz tell me the circuit diagram interfa...
ajay_bhargav Avatar
Posted By ajay_bhargav
Thu Jan 29 2015, 06:28 AM
Moreover I see the segment Anode is connected via ...