02-02-2010, 10:06 PM
[attachment=1695]
TITLE : DIGITAL CODE LOCK
INTRODUCTION
Here is a project called ˜Digital Code Lock using AT89C2051'. LCD is used for display and a keyboard is used to input the keys. This project source code is written in C.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 4×3 Keypad (please see the schematic for more information) and Display the user input on a 2×16 LCD. A pin is assigned as output for activating and deactivating the lock. For demonstration an LED is connected to that pin.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.Keypad has 12 keys (4×3) 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.
Submitted By:
Neha Sadavarte-25
Prerna Sarda-30
Radhika Gupta-32
PROJECT GUIDED BY:
Prof.M. Korde
CIRCUIT DIAGRAM
PIN DIAGRAM
WORKING
