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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...

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Posted on Wednesday 29 August 2007 - 05:00:51

Caller id project
Forum -> Project Doubts
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..
CODE:
STD           &...

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Posted by Ajay on Wednesday 25 July 2007 - 06:29:32



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8051 Microcontroller Projects 8051 AVR tutorials PIC microcontroller, 8051 assembly language programming electronics and communication ECE CSE pdf ebooks library BE final year project ideas Embedded systems