DIY Park Ranger: Overview
Video Link...
http://www.youtube.com/watch?v=rxXjE53mxFU&feature=player_embedded
DIY Park Ranger: Part I - The Electronics Unit
Video Link...
http://www.youtube.com/watch?v=RqEcRdIgipI&feature=player_embedded#at=91
DIY Park Ranger: Overview
Technical Summary: The Park Ranger is an ultrasonic-ranging prototype designed to assist drivers who are backing into tight areas. The ranger uses ultrasonic pings to measure distance to the object behind and indicates this distance by sending audible tones to your FM radio. Optional panel-mount LEDs offer visual aid for calibration as well as warning drivers behind you.
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http://amani64.com/park.htm
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