Sonar for the Visually Impaired v1

These items are part of a project to let people who are visually impaired make use of an ultrasonic transducer, raspberry pi, and mini speaker to acquire additional information about their surroundings.
More information can be found at http://www.instructables.com/id/Ultrasonic-Sonar-for-the-Blind-and-Visually-Impair/