Design And Construction Security Code Lock

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DESIGN AND CONSTRUCTION SECURITY CODE LOCK

ABSTRACT

This Digital Door Lock – is simply a password based electronic code lock designed using 8051 micro controller, a keypad and a 12 volt dc relay. In this article, we have designed a simple digital door lock using 8051 -which can be used as a security checking system to limit access to an area/room only for certain individuals with the password. So our digital door lock project can be called with a very wide range of names like a digital combination lock using 8051 or a digital security code lock using 8051 microcontroller or a password security system using 8051 or an electronic code lock or a digital code lock using 8051. People call this kind of a “security system” with different names, though all of them mean to build a basic password based security system using a micro controller like 8051 or avr or pic or arduino (a controller of choice) with extra features like automatic door lock/opening facility, sound alarm, gsm based sms alert etc.

Our Digital Code Lock project – is a simple electronic number lock system or an electronic combination lock using 8051 – which has a preset 5 digit passwordstored inside the program.The system collects 5 digit user input, compares the user input with the preset password inside program and if the user input and stored password matches, access will be granted (by opening the door with the help of relay for a few seconds and closing it automatically after stipulated time) . If there is a mismatch between user input and stored password, access will be denied (by not opening the closed door – that is by keeping the relay in OFF position)

Note:- We have a wonderful collection which we have designed and published previously. Take a look If you are interested in building 8051 based applications and systems yourself! It’s a lot fun to learn and build new stuffs.

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