HandBat is a handheld Ultrasonic Radar device that sends out pulses of UltraSound and listens for Echos, like a Bat. It is intended for use by vision-impaired people or navigation in the dark. Handbat is housed in a low-cost ($3.97) Rayovac Floating Lantern case from Walmart. It is made from 5...By: YourDuino-Maker
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