{"ref":"ENADD-1.1","ref_type":"tag","master_branch":"master","description":"Computerized Aide for Navigating Environments -- a project started by FIRST Tech Challenge team 4969 Robot-X from Saint Xavier High School. The system uses distance data to set an auditory beep frequency on four channels (more urgent means a closer obstacle). Written for arduino with a sound card and ultrasonic/infrared distance sensors.","pusher_type":"user"}