Basic Level     Skills: Not specified    
Author email
[email protected]


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:

Diagram bitmap.bmp
Lock_EBES_MODEL.DSN ( Using Proteus to run this file)
Tags PIC digital lockpic microcontroller combination lockcombination lock projectPIC microcontroller digital lockdigital lock using pic micro

70.27 kB





21 Jul 2014: 19:30 PM
what compiler use to write this project codes? How can i edit this code?
(Required; Min length 5)
(Required; will not be displayed)


Fri Apr 16 2021, 08:49 AM
Maria Campbell
It looks like you've misspelled the word "temprature" on your website. I thought you would like to know . Silly mistakes can ruin your site's credibility. I've used a tool called in the past to keep mistakes off of my website.-Maria
Thu Apr 15 2021, 11:47 PM
Rachel Cohen
Wed Apr 14 2021, 07:42 PM
Wed Apr 14 2021, 05:05 PM
Thank you for some other excellent article. Where else may anyone get that type of info in such a perfect manner of writing? I have a presentation subsequent week, and I'm on the search for such info. viagra otc
Wed Apr 14 2021, 03:56 PM
Hello, i think that i noticed you visited my web site thus i came to return the prefer?.I am attempting to in finding issues to improve my website!I assume its good enough to make use of a few of your ideas!! Katja



Thu Jun 25 2020, 03:46 PM
Mon Jun 22 2020, 03:03 PM
Tue Jun 16 2020, 05:10 PM
Sat Jun 13 2020, 09:43 PM
Thu May 21 2020, 12:44 PM
Thu May 21 2020, 01:28 AM
Wed May 20 2020, 07:05 PM
Wed May 20 2020, 11:52 AM


Guests: 84, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 05:37 AM

Members: 38215
Newest member: Mirza123