DIGITAL CODE LOCK.doc (Size: 98 KB / Downloads: 1497)
TITLE : DIGITAL CODE LOCK
Here is a project called ËœDigital 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 4Ãƒâ€”3 Keypad (please see the schematic for more information) and Display the user input on a 2Ãƒâ€”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 Ëœ#â„¢. 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 Ëœ#â„¢ to save it.Keypad has 12 keys (4Ãƒâ€”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. Ëœ*â„¢ is used as the Cancel key and Ëœ#â„¢ is used as the Enter key.
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