at89c2051 based digital code lock - Rickey's World of Microcontrollers & Microprocessors

Digital Code Lock with LCD and Keypad using AT89C2051

A Brief Description:
This project is written in C language. 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. User has maximum of 3 retries.. if fails then Master Locks ha... Read Compelte post

Other Tags: AT89C2051 Projects 4x3 Keypad driver LCD 4-bit AT89C2051 based Digital code lock

Posted on Wed Aug 29 2007, 12:00 PM

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Mon Jan 07 2019, 03:31 AM

ExperimenterUK

@REVOCATUS please post in the AVR forum

Mon Dec 24 2018, 09:25 AM

REVOCATUS MATEMU

sorry I mean referee boards for player substitution

Mon Dec 24 2018, 09:24 AM

REVOCATUS MATEMU

hi am.looking how to build referee by using Atmega 328 and its codes

Sat Dec 15 2018, 01:45 PM

Arslan ayoub

Hii ,, can I get the simulation of numeric keypad lock on proteus

Mon Dec 03 2018, 05:17 PM

ExperimenterUK

Please post questions in the forum. The chat box is for chat

Mon Dec 03 2018, 06:43 AM

help!me!

help! I don't understand busy flag!

Sun Dec 02 2018, 08:01 PM

ile

hello

Mon Nov 12 2018, 05:58 AM

Pavan_user

i have seen your replica of I2C programming using AT89C51 but i am unable to understand the "ack_bit" variable usage ...looks like it is always 1...can you elaborate how acknowledgment is working....