Ultrasonic Range Finder with Haptic Feedback called The Bat Hat From: Circuit Cellar- 01/2014 - page 8 "Ultrasonic Range-Finding Hat": The aim is to give vision-impaired pedestrians a way to navigate without walking canes. Read the entire article at: http://read.uberflip.com/i/231903/9# Links: Ultrasonic Range Finder with Haptic Feedback called The Bat Hat http://hackedgadgets.com/2013/12/04/ultrasonic-range-finder-with-haptic-feedback-called-the-bat-hat/ The Bat Hat http://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/f2013/jjb284_cc697_adk75/jjb284_cc697_adk75/index.html How I Created a Haptic Ultrasonic Range Finding Hat http://www.blendedtechnologies.com/how-i-created-a-haptic-ultrasonic-range-finding-hat/234 Ultrasonic Pathfinder http://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/f2013/js2587_mg792/js2587_mg792/js2587_mg792/finalProject.html Acoustic Wayfinder http://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/f2013/xs46_ebl43/xs46_ebl43/xs46_ebl43/webpage.html Range-finding http://en.cyclopaedia.net/wiki/Range-finding Related: ECE4760 - Designing with Microcontrollers http://people.ece.cornell.edu/land/courses/ece4760/ Eye Mouse http://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/f2013/msw234_sf323/msw234_sf323/msw234_sf323/Eyetracker.htm