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This project is developed for blind peoples to find out the obstacles in front of them by using radar technique.

The main modules in this project are Ultrasonic transmitter, Ultrasonic receiver, Microcontroller unit and audio section.

An Ultrasonic signal is produced by using the electronic circuit. The Ultrasonic waves produced is transmitted along a particular direction. This signal travels and falls on the Obstacles and reflected back.

In the electronic circuit, there is an ultrasonic receiver. The reflected signal can be received through the receiver.

The microcontroller counts the time taken between the transmission and the receiption and thus calculates the distance. If there is obstacles in front of them, it produces a warning signal. Thus the user can easily identify the obstacles in front of him.

This project is very useful for blinds