3 Dec 2014

Assisting Blind person using RFID Card and Readers



This Project comprises of a Hardware mechanical model which is controlled by the electronic circuits to assist a blind person. I.e., This mechanical model is attached with the walking stick of the blind person.  The model will move automatically. This model helps the blind person to reach the destination quickly. The model has a Master Control unit through which it can identify the path. When the source and destination is selected the unit will calculate the path using. The unit will then tell the user to move in which direction. The movement of the user in ensured using a RFID proximity cards and a reader. The reader will be placed on the unit and on encountering of cards (Cards placed at each point) will tell the user has to take right or left or straight through voice output.  An APR 9600 voice storage and retrival IC is used for this purpose. 

The unit will give alarm signal when it finds a Obstacle. This project is divided into modules for better understanding of the circuit.
The modules included in this project are
                                                Pic Embedded Microcontroller PIC 16F877
                                                Battery for Power Supply
                                                RFID Card Reader with cards
APR 9600 Voice Recording and Playback IC
Software Driver in Hitech ‘C’ Language.

Pic Embedded Microcontroller (PIC 16F877):
            This is the heart of the device which is responsible for sensing the obstacles and producing voice Output.



RFID Card Reader with Cards
            A RFID Card reader is fixed on the unit.  Cards will be placed on the path at regular intervals.  When the unit encounters a card, it can sense the point at which the unit is present through the unique code present in the card.

APR 9600 Voice Recording and Play Back IC


            This IC is a Single Chip Voice Recording and Playback IC.  A Prerecorded Voice is Stored into the IC.  It can be played again by the controller by sending a control signal to the IC.

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