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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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Tue Oct 13 2015, 06:08 AM
Can anyone please help me solve these problems?
Tue Oct 06 2015, 08:22 AM
HI you looking for ideas or you have solution
Fri Oct 02 2015, 03:39 PM
poojitha: projects on wireless communication between two microcontrollers
Thu Oct 01 2015, 04:38 PM
hey! i wanted to simulate my circit using proteus. i have a sugar cube relay in my circuit....but i dont know which one is that in the device libraries of the software. any help? thankyou.
Tue Sep 29 2015, 09:40 PM
@Michal, that rocket is too heavy for itself and trust is not enough unless afterburners are fed with fuel properly.
Sat Sep 26 2015, 08:19 PM
Hello, its possible to make a amateur rocket with this engine, or something simillar, which be able to flight?
Thu Sep 24 2015, 10:38 AM
Ir Switch sir.
Wed Sep 23 2015, 01:10 AM
@engr1931 which project ?
Tue Sep 22 2015, 11:57 AM
Hello sir, is it ok to use 12.000MHz oscillator in IRswitch, because the requirement written in the post is 11.059MHz. And i use PIC1018 as an Ir receiver
Mon Sep 21 2015, 04:15 PM
Hello sir, your blog is kind of helpful for us especially students. May I know do you have the coding for decimal to binary using proteus 8. My mini project is about to convert decimal to binary just like a calculator. The output is LCD. A bit confusing is the decimal to binary coding on proteus 8. pls help thanks.



Sat Oct 10 2015, 10:49 AM
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Sat Sep 26 2015, 01:26 AM
Fri Sep 25 2015, 10:57 AM
Wed Sep 23 2015, 08:13 PM
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Forum Activity
praveenraoms Avatar
Posted By praveenraoms
Tue Oct 06 2015, 01:06 PM
hi i want to know the code to access the geographi...
sachinmm Avatar
Posted By sachinmm
Wed Sep 30 2015, 08:54 AM
how to used polling method in this?? my code is co...
ajay_bhargav Avatar
Posted By ajay_bhargav
Tue Sep 29 2015, 09:39 PM
__irq is just compiler directive to wrap IRQ routi...
ajay_bhargav Avatar
Posted By ajay_bhargav
Tue Sep 29 2015, 09:36 PM
The comment does say the time values as per the th...
ajay_bhargav Avatar
Posted By ajay_bhargav
Tue Sep 29 2015, 09:33 PM
are you testing this on Proteus? or MplabX simulat...
ajay_bhargav Avatar
Posted By ajay_bhargav
Tue Sep 29 2015, 09:31 PM
[Topic moved to ARM Development Forum]
ajay_bhargav Avatar
Posted By ajay_bhargav
Tue Sep 29 2015, 09:29 PM
start with reading datasheet. SPI interface on LPC...
ajay_bhargav Avatar
Posted By ajay_bhargav
Tue Sep 29 2015, 09:27 PM
I am not sure you've solved it or not but "USARTRe...
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Sep 29 2015, 06:31 PM
i am confused in "__irq" it is uesd??sachin...
sachinmm Avatar
Posted By sachinmm
Tue Sep 29 2015, 11:11 AM
my I2C.c file=>>/*********************************...