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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?
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Mon Nov 23 2015, 06:32 PM
طريقة عمل مشروع dtmf على الماتلاب بالتفصيل
Mon Nov 23 2015, 02:26 PM
Muhammad Naveed kayani
principal of Electrical circuits 8th Edition, by Thomas L. Floyd , Prentice Hall please send me ... ??
Sun Nov 22 2015, 03:20 AM
@Naresh Jain ..hex file for what ?
Thu Nov 19 2015, 04:16 PM
Naresh Jain
can u arrange hex file
Thu Nov 19 2015, 04:14 PM
Naresh Jain
where is PCB file ? there is error.
Thu Nov 19 2015, 02:25 PM
hello all
Thu Nov 19 2015, 03:31 AM
@Bhaveen Lodaya.. can you rejoin as a new user
Wed Nov 18 2015, 03:39 PM
Bhaveen Lodaya
@Ajay... I forgot my username and password as I haven't used this site for a very long time. Please help me reset it. I am not receiving the password reset emails too.
Sun Nov 15 2015, 04:31 AM
@Phil, please check my PM and reply.
Thu Nov 12 2015, 08:50 PM
@Ajay.. PM sent.. just routine stuff



Sat Nov 21 2015, 09:19 PM
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Wed Nov 11 2015, 09:02 PM
Wed Nov 11 2015, 09:20 AM
Tue Nov 10 2015, 11:12 PM
Thu Nov 05 2015, 06:27 PM
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