Smart Computing- Book ISBN- 978-81-953658-1-4

Author:- Margini Raval

Abstract :-Among the five senses, Vision is perhaps a special sense gifted by God to human beings. With the help of our eyes, we can see the things that happen in day to day life. But some visually impaired people can't experience these things. With the advancement of technology, Assistive devices are developed for the benefit of blind people. Nowadays, blind people are usually seen with the Cane (Blind stick) as their assistive device. Due to this device, they have to hold it in their hand. GPS (Global System for Mobile Communication) based system can't be affordable for a common person. This system focuses on a technology that is usually worn around the waist as an obstacle detector. This paper presents ultrasonic based path planning for blind people by detecting the obstacles nearby them. In this device, an ultrasonic sensor detects obstacles up to 4m. This proposed system uses Microcontroller interfacing with the arrays of ultrasonic sensors for detecting the obstacle in three different directions (Front, Right and left). It uses speech and vibrational feedback to aware blind people. According to the detected direction of the obstacle, the pre-recorded audio files stored in MP3 Module is played, and blind people get a message through an earphone. And it also helps deaf people by interfacing the microcontroller with the vibration motor (DC Motor).  So by this vibration motor, deaf people can feel the response through vibration and change their path. Now it's time to change the world of visually challenged people by just wearing such assistive devices on their bodies and live their life as per their comfort zone.

Keywords: - AVR 8-bit microcontroller, Ultrasonic Sensors, Mp3 Module, Vibration Motor.