Microcontroller Based Ultrasonic System to Help Blind People

Difficulty in performing daily tasks in the life of the blind people requires necessary intervention by scientific manners to support and help these people through technology which has become a solution for many problems facing the people at the present time. Such kind of help will open horizons for a better quality of life without reliance on others to perform simple tasks inside or outside their homes, thus increasing their confidence in participating actively in the community.Two related but independent systems have been developed in this book: a helmet based system, and a hand based system. The first system is based on ultrasonic sensors and a microcontroller to detect the obstacles around the blind person. The positions of these obstacles are given to the blind person in audio form through a speaker. Thus, the blind person can walk with the help of the designed system and avoid any accidents.The second system consists of a bandage around the wrist of the blind person where a pair of ultrasonic sensors is mounted at the frontal position of the bandage.