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Parts list, circuit diagram, and code, for this Arduino-powered obstacle-detecting walking stick with an ultrasonic distance sensor: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Elec_p107/electricity-electronics/obstacle-detecting-walking-stick?ytid=7hmTb7Iqm4s&ytsrc=description 0:00 introduction 0:20 physical construction ...
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