Now-a-days many accidents occur due to intense
traffic. It is very difficult for blind people for path finding without others
help. This project helps to facilitate blind people in path clearing assistance
and obstacle detection. In this project
we are using an IR transmitter and Receiver circuit based path clearing assist
cap. Path clearing assist cap is used to detect any obstacles. If any obstacle
is found, the IR light will be reflected back and sensed by IR receiver and
sends a signal to the buzzer driver circuit, which produces buzzer sound near
hand. This projects works very well even in night
and day timings, irrespective of the lighting intensity. This project is
reliable and effective. This project uses
regulated 5V, 750mA power supply. Unregulated 12V DC is used for relay.
7805 three terminal voltage regulator is used for voltage regulation. Bridge
type full wave rectifier is used to rectify the ac output of
secondary of 230/12V step down transformer. This project can be
powered by a simple 9V battery also for portability.
Block Diagram :
