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A Brief Description:
This a simple project with
efficient hacking prevention from Brute Force etc. The basic
user lock is of 5 Digits and Master Lock is of 10 digits so
its not easy for an intruder to break the lock unless you
keep the code simple.
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.
User Side working:
The user has two options either he/she can use its own 5
digit code or use the default 5 digit code. If user has to
do setup his own code, then he has to enter "12345" and
press '#'. After this.. controller will ask for 10 Digit
master password which is preprogrammed in the controller.
Entering master lock, user can enter the new 5 digit code
for the lock and press '#' to save it.
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.
Circuit Diagram:
Download File Information:
LCD.C - 4-Bit LCD Drivers
LCD.H - LCD function prototypes and other declerations
Lock.C - code for lock functioning
LOCK.H - lock function declerations
KEYPAD.C - Keypad drivers
KEYPAD.H - Function declerations
DELAY.C - Delay Functions
DELAY.H - Function Prototypes only
MAIN.C - Main function!
Digital Code Lock Schematic - PDF file of orcad schematic
Download
the source codes by
clicking here
Post your doubts in www.8051projects.net/forum.html
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