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 parts:
- A YourDuino Robo1 Microcomputer (Or similar Arduinos)
- An Ultrasonic Sensor
- A small Beeper
- A Battery Holder for 4 AA batteries
- "Rainbow" cable (Cablemaker) strips
These parts are widely available on Ebay, Sparkfun.com, Adafruit.com, YourDuino.com etc.
A kit with the needed parts is available HERE: