Digital Code Lock with LCD and Keypad

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
Posted on Wed Aug 29 2007, 05:30 pm

Caller id project

First of all talking about the circuit. I will give a brief description of the ICs used.
1. MT8870: A DTMF decoder IC, parallel o/p.
2. AT89C2051: 8051 Controller
3. LCD: For display
4. MCT 2E: Opto coupler to check the receiver is picked or not.

Now Software..
The code is really simple, at the top is ports definition. Defining the MT8870 interface as..

... Read Compelte post

Posted by ajay_bhargav on Wed Jul 25 2007, 06:59 pm

Downloads

Comments

EdwardFew
Mon Mar 18 2024, 01:14 pm
EmeryPah
Mon Mar 18 2024, 11:51 am
RobertMax
Sun Mar 17 2024, 10:22 pm
DanielJar
Fri Mar 15 2024, 06:52 pm
Tuzaimecor
Fri Mar 15 2024, 02:32 am
PromotionFoode
Thu Mar 14 2024, 08:11 pm
EdwardGeawn
Sun Mar 10 2024, 12:24 pm
ZacharyShado
Sat Mar 09 2024, 10:04 am