Consult Intestines lease ultrasonic walking stick for the blind design minus It's cheap
PDF] Low Cost Smart Stick for Blind and Partially Sighted People | Semantic Scholar
How to make Smart Blind Stick with Arduino | Arduino Project - YouTube
Sonar sticks use ultrasound to guide blind people | CNN Business
The white stick gets a 21st century makeover: £30 smart cane uses SONAR and vibrations to help blind people 'see' | Daily Mail Online
Smart blind stick | PPT
S A Engineering College students develop (electronic walking stick) Smart e- cane for blind to detect obstacles | Engineering, Science & Technology Resources Portal
Smart Blind Stick Using Arduino | Ultrasonic sensor based project