The Hand-Mounted Haptic Feedback Sonar Obstacle Avoidance Asstance Device.. Or The Tacit

August 19, 2011 by Nick Schulze 14 Comments

Here is a hack that takes the stick out of the blind mans hand. [Steve] has been working on the Tacit, a wrist mounted sonar device with haptic feedback, it’s like strapping a bat to your wrist to help you see. The Tacit uses two sonar ping sensors to measure the distance to the nearest obstacle, the relative distance to an object is then fed back to the user using two servos which apply pressure to the back of the wrist. The Tacit is sporting an Arduino pro mini to control the ping sensors and drive the servos, and runs off a 9 volt battery.

This is not an entirely new concept, haptic headbands have been around on the net for a while, but the Tacit allows the user to detect obstacles on the ground waiting to trip you up. All in all a neat hack that may have a future in helping the blind. Check out the video after the break to see it in action.

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Roller Curtains With Your Graphics On Them

November 26, 2010 by Mike Szczys 5 Comments

[Lenore] added a bit of customization to her office window hangings by fitting roller curtains with custom printed fabric. The treatment seen above is a $20 Enje roller blind from Ikea but that logo is all Evil Mad Science. The weight at the bottom of the fabric uses a friction-fit plastic insert that can be stapled onto new material. Some fusible tape was ironed onto the sides to finish those edges, and the roller at the top has strong adhesive that remains for a second use after peeling off the original material.

A fabric printer was used to produce this rendition of shades. But we’d like to see some conductive thread added for a f abric-based display that can be rolled up when not in use.

Audible Tuner For The Blind

June 27, 2010 by Mike Szczys 17 Comments

[Lain Sharp] modified this guitar tuner so it can be used by his blind friend. In the picture above you can make out a small white project box that houses the additional electronics. Inside is another battery and an ATmega168 providing a connection for an earphone. The AVR chip connects to each LED on the tuner and converts the visual tuning meter to an audio cue. Check out the demonstration clip after the break to see how it works.

Now if we could just figure out how to get our strings in tune with our built-in keyboard.

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DS Based Reader For The Blind

November 30, 2009 by Mike Szczys 14 Comments

[Epokh] has release some homebrew software that uses a Nintendo DS as a voice reader for documents. This is extremely useful for blind and visually impaired folks who normally use screen readers but can utilize this technology for reading books, documents, and email on the go. Future versions look to add an email client and implement OCR via the camera for reading documents on the go.

The flite package is utilized to provide the text to speech functionality. We’re familiar with this package and judging by the video after the break, it lost nothing in the port to the DS hardware. [Epokh] pointed out that similar readers can cost $1500 when a DS sells for around $130. We can’t wait to see the final version fleshed out!

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Sonar Navigation Jacket

November 20, 2008 by Caleb Kraft 15 Comments

sonar_jacket

[Lynne] had this crazy idea to build a piece of clothing that would give you feedback about your surroundings using sonar. She started with a carefully selected thrift store jacket. She wanted something that looked good and also provided plenty of places to hide electronics. She used the LilyPad system, with a vibration pad and a sonar range finder. When the system detects an object within a certain distance directly in front of the wearer, it warns them with some vibration. Not only is it practical, it looks pretty cool too. Did we mention she designs clothing?

She notes, in the comments section, that while it can detect an obstacle, it cannot detect a void. How could she detect a drop in the floor or a step down?