Following today’s earlier post on data gloves, HandUSB is a glove interface designed to relay fingertip touch data to a computer via USB. Although the gloves themselves are not extremely interesting or useful for your average hacker, the project has some good documentation. The electronics are all open source and he has links to the EAGLE files and the AVR Libc code. You can also find a demo program written for DOS. This project uses AVR-USB by Objective Development so if you are looking to move on from your USB-serial chips, this project would be a good resource to study.
Haptic feedback (sometimes referred to as tactile or force feedback) offers what some might call a brave new world
of interaction and immersion. The 1932 book of the same name was probably the first introduction many people got to the idea of computer generated touch sensations. In the book, movies are replaced with what are called “feelies”; patrons sit in chairs that provide feedback throughout the screening.
While we don’t see this coming to your local megaplex any time soon, we are starting to see the technology creep into our lives. After the break lets take a look at some examples, talk about projects we’ve covered before, and how you can get started developing your own.
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[Christopher Jette] did a amazing job converting a 56″ rear projection television into a multitouch display. His original inspiration came from this drafting table project. The screen is a large sheet of 1/2″ acrylic with a screen material attached to the back side. The screen edge is surrounded by 168 IR LEDs. When a finger tip touches the surface it scatters the LEDs’ IR light. A webcam sees this scattered light and determines where the fingers are. Inside the box is a standard video projector. This is a great reuse of old equipment and we love to see a hobbyist making up ground where manufacturers aren’t. For more info on multitouch projects, we suggest the Natural User Interface Group. Here’s a video of [Christopher]’s display in action:
Continue reading “Multitouch rear projection TV”