This project uses ultrasonic sensors connected to an Arduino Pro and servos that nudge the wearer when an obstruction is detected.
It’s wrist mounted and senses objects from about 1 inch (2 cm) to 10 feet (3.5m). It has generally fast response time (fractions of a second) to quickly navigate complex environments. It’s designed to help a vision impaired person to navigate complex environments. Mounted to the back of the hand, the force feedback means it doesn’t interfere with other assistance devices that mount elsewhere and use audio feedback cues. The learning curve is measured in seconds, everyone who has worn it has figured it out immediately.
[Thanks, Amanda]
For those of you with an overwhelming desire to build your own subatomic particle accelerator, look no further than this Instructable by Xellers, which shows you how to convert a wine bottle into a cathode ray tube (CRT). Of course, that’s not all you need: other ingredients include a two-stage vacuum pump, a neon sign transformer, a high voltage microwave oven diode, and a few other parts that can be found at your local hardware store. Xellers doesn’t recommend running the tube for more than 40 seconds at a time, so unfortunately you’ll have to use a different method to build that needlessly complex (albeit really cool) reading light you’ve been dreaming up.
More:
The Cathode Ray Tube site, old electronic glassware…
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