Ibutton Security System

 Ibutton Security alarm Essay


Title of the project I-BUTTON GAIN ACCESS TO CONTROL SECURITY ALARM Domain: Advanced Embedded Devices Design

Computer software: Embedded C, Keil, Proload

Microcontroller: AT89S52

Power Supply: +5V, 750mA Controlled Power Supply

Display: LED 5mm, 16 Times 2 LCD

Crystal: 14. 0592MHz

Data Communication: Through Serial Interaction

Applications: Universities, Companies, Financial institutions, Industries etc


The iButton is a laptop chip surrounded in a 16mm thick stainless steel can. For that reason unique and durable container, up to date information may travel using a person or object everywhere they go. The steel iButton can be installed virtually anywhere because it is rugged enough to withstand harsh surroundings, indoors or outdoors. It can be small and lightweight enough to install to a important fob, diamond ring, watch, or perhaps other personal items, and become used daily for applications such as gain access to control to buildings and computers, advantage management, and various data logging duties. By simply touching the iButton to the two contacts referred to above, you can communicate with this through our 1-Wire process. The 1-Wire interface has two interaction speeds: standard mode by 16kbps, and overdrive function at 142kbps. For more information, you should see our application take note, Reading and Writing 1-WireВ® Devices through Serial Cadre. In this project, the iButton can is interfaced while using micro controller and when the iButton can be brought to the sight from the can, it reads the information on the iButton and exhibits on the LCD. If the info of the iButton is matched with the data inside the program memory then it compares and shows authorized meaning. If the data is certainly not matched that displays unauthorized. For certified message, the door gets opened up and the person gets in after at some time the door gets closed (A relay will be energized). If it is an illegal person that alerts the persons through a buzzer. This kind of project uses regulated 5v, 500mA power supply. 7805, a...

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