digital code lock

  
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The project called Digital Code Lock using AT89C2051 ². 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 bre

ak the lock unless you keep the code simple. The input is taken from a 4G—3 Keypad (please see the schematic for more information) and Display the user input on a 2G—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 ³ 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 (4G—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.



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