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Simple Combination lock Project with keypad and LCD
Author DAT
Author email kdvustudents@hotmail.com
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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
Image
Filesize 70.27 kb
Date Sunday 02 December 2007 - 04:42:57
Downloads 5932
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Rating
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Comments



Microcontroller ebooks Projects codes examples Anonymous | 22 Dec : 09:58
its excellent in proteus

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Microcontroller ebooks Projects codes examples yassmeenfatima | 27 Dec : 18:29
i want code for password based door locking system
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Microcontroller ebooks Projects codes examples Ajay | 27 Dec : 23:53
wrote ...
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”.

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Microcontroller ebooks Projects codes examples a | 20 Feb : 12:19
excellent effort
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Microcontroller ebooks Projects codes examples Anonymous | 06 Mar : 10:14
necesito ke me ayude a deplegar un * en un modulo lcd con un 89c52 mi mail es orduzandres02@hotmail.com
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Microcontroller ebooks Projects codes examples Luka | 12 Mar : 13:38
Does anybody have the PCB for this project. If so woud you poste it here. BW Luka
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Microcontroller ebooks Projects codes examples Anonymous | 16 Apr : 05:38
hai dude can you tell me the signals from the keyboard
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Microcontroller ebooks Projects codes examples udprk@rediffmail.com | 21 Jul : 10:38
just mail me the PCB of the circuit

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Microcontroller ebooks Projects codes examples cuy | 04 Aug : 03:12
any1 no why the output of keypad 4x3 ==15 and this refer to #
and also 13 refer to *...can find inside the code
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Microcontroller ebooks Projects codes examples Ajay | 04 Aug : 09:16
4x3 keypad is actually called telephone keypad. so you can see on your telephone * and # keys are there.
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Microcontroller ebooks Projects codes examples jiggi | 11 Aug : 04:45
sir i need a datasheet of LCD 20*4
pl. send me i want to implement in another project sir
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Microcontroller ebooks Projects codes examples Ajay | 11 Aug : 23:43
datasheet is same as that of 16*2, you can download from the link provided in LCD tutorial Introduction page.
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Microcontroller ebooks Projects codes examples wan | 15 Sep : 09:15
sory.. sir, can i obtain asembly language here??
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Microcontroller ebooks Projects codes examples rearthur2003 | 23 Sep : 09:32
this is wonderful, but it will be a plus if you could change with some combination.great job
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