Digital Lock Using AT89C2051 with LCD and Keypad - Assembly

Digital Lock Using AT89C2051 with LCD and Keypad - Assembly A Brief Description: This project is a rewrite of previously made project "Digital Code Lock using keypad and LCD" I got many requests from student's side who want this project in Assembly language. So i spent some time making this project. You will find working of this project same as that of original project. Nothing has been changed as such. Its 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. Download File Information: LCD.asm - Project Code LCD.hex - Final Hex file Digital Code Lock Schematic - PDF file of orcad schematic
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Filesize	17.46 kB
Date	Saturday 31 May 2008 - 12:19:07
Downloads	44878
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