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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