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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
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70.27 kB

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62250

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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

Wed Mar 04 2015, 11:57 AM
Shoukat
What is general purpose card used in metro train prototype.waht is its functionality?
ajay_bhargav
Wed Mar 04 2015, 04:49 AM
@candyyyy, If its about LCD then you can pull down with 1K resistor. dont leave it open
Tue Mar 03 2015, 06:59 AM
candyyyy
Hi! Can i ask how do you connect the Vo contrast pin? Do i leave it open?
ExperimenterUK
Sun Mar 01 2015, 07:06 AM
@Anupam Biswas..post all you have done in the GSM forum
Sat Feb 28 2015, 02:51 PM
Anupam Biswas
I am doinga project on gsm based home automation.I have done alittle study about at commands.I am using Atmel 89c51 with yhe gsm module.I am unable to receive any message via the module.The simulation is done on proteus and i am using a virtual terminal.Can anyone please help me?Thanks in advance.
Tue Feb 24 2015, 12:47 AM
MrCurious
is Stat a global variable too? you reference it in Chan's "disk_status" function.
Sat Feb 21 2015, 09:10 PM
Harikumar
കൊള്ളാം
ExperimenterUK
Fri Feb 20 2015, 06:28 AM
@sugikz.. I have asked Ajay about it, he'll soon sort it out
Thu Feb 19 2015, 12:22 PM
sugikz
"Sorry no bots allowed! You entered two different email addresses. Please enter a valid email address in the two fields provided"
Thu Feb 19 2015, 12:21 PM
sugikz
this are the problem notice box;

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Comments

Xtens
Wed Mar 04 2015, 11:09 AM
MALIKATIF
Mon Mar 02 2015, 04:47 PM
raamchandran
Mon Mar 02 2015, 11:20 AM
ABiDAEV
Sat Feb 28 2015, 11:31 PM
arunkollam
Wed Feb 25 2015, 05:28 AM
sugikz11
Wed Feb 25 2015, 04:23 AM
Buhari
Sun Feb 22 2015, 03:16 PM
Jarvis_v3
Sat Feb 21 2015, 02:00 AM

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Forum Activity
steve_yu_chan Avatar
Posted By steve_yu_chan
Wed Mar 04 2015, 02:55 PM
As per the datasheet, if you want to operate load ...
ajay_bhargav Avatar
Posted By ajay_bhargav
Wed Mar 04 2015, 04:51 AM
As per the datasheet, if you want to operate load ...
steve_yu_chan Avatar
Posted By steve_yu_chan
Wed Mar 04 2015, 04:18 AM
yes, i following the data sheet typical applicatio...
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed Mar 04 2015, 01:38 AM
I follow the LT3652 data sheet (page 26) to connec...
steve_yu_chan Avatar
Posted By steve_yu_chan
Tue Mar 03 2015, 04:32 PM
Dear All ,can you help me to solve the regarding t...
ABiDAEV Avatar
Posted By ABiDAEV
Sun Mar 01 2015, 11:42 AM
Thanks for sharing, but can you please update the ...
sankalp_s Avatar
Posted By sankalp_s
Thu Feb 26 2015, 09:27 PM
What are you trying to make ?ExperimenterUKsir i w...
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Feb 26 2015, 12:58 AM
We seem to be moving away from the original projec...
ajay_bhargav Avatar
Posted By ajay_bhargav
Wed Feb 25 2015, 02:02 PM
You will need a 64 bytes buffer that will be writt...
PsySc0rpi0n Avatar
Posted By PsySc0rpi0n
Wed Feb 25 2015, 09:24 AM
I've already read that tutorial and almost all oth...