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problem is, it says here that the erica system gets only "approximately 0.5 to 1 centimeter accuracy on a computer monitor when sitting at a normal viewing distance", versus the trackir, which gets a sensor accuracy "greater than 1 mm in translational reporting RMS, accuracy is about .5mm" at 18" from the unit, as reported by an employee on their dev boards here.

btw, trackir also has mostly working linux drivers, and a freeware non-commercial activex component.

Although not for the disabled, if you just want a head controlled mouse (for 100 bux), then see the Natural Point.

-Kraft

I happen to suffer from serious wrist pain and being an input freak I decided to take it all the way. Yes, I'm convinced that the Evolution keyboard is better than an old clickety-clack keyboard, but if you want to see some real damage reduction, you have to go extreme.

I decided to go for a Datahand, and at around 1500 bux I think it's the most expensive keyboard out there. I'm very happy about it, but I only type at max. 95% of my old typing speed. A little bit frustrating, but worth it. If I use a regular keyboard for more than 20 mins, it's hell. I have also tried the Kinesis Essential keyboard, which is much cheaper, but a very good ergonomic keyboard.

For a while I used a Foot switch, also from Kinesis, but this was a real waste of money. You have to always have your feet in the same place to use it, and it's waaaay too small - I kept hitting two buttons at the same time.

Since I still have some problems with my arms, I decided to go for some armrests. These are movable and kinda cool looking together with the datahand, and although the product is good quality, I don't really feel that they that much. They give a marginal improvement at best.

Oh, the built-in mouse on the Datahand sux, so I ordered a head tracked mouse (after seeing it on /.) from Eyecontrol, but it still hasn't arrived.

I personally think that the mouse is the biggest culprit when it comes to wrist problems, but I am still considering using some kinda speech recognition software. Ok, I'm a bit geeky about this, but I'm 23, and I need these hands for many more years.

-Kraft

-Kraft

Linux

Task: Develop a driver for the Cypress EZ USBFX that works in conjunction with the system USB driver stack

...please email projects@naturalpoint.com...

Linux

Task: Develop a driver for the Cypress EZ USBFX that works in conjunction with the system USB driver stack

...please email projects@naturalpoint.com...

Task: Develop a driver for the Cypress EZ USBFX that works in conjunction with the system USB driver stack.

If you are interested in joining this team or have suggestions please email

Task: Develop a driver for the Cypress EZ USBFX that works in conjunction with the system USB driver stack.

If you are interested in joining this team or have suggestions please email

It appears as if they're interested in having people help out to develop Linux drivers for the TrackIR. From their Discussion Forum:
---
Title: Welcome! (probably want to read me)
Author: warren blyth
Date: 2001-03-20 22:03:15-08
ahoy all,
In order to expand the user base for the trackIR, wed like to focus on developing OS device drivers. Were trying to pull together a group of interested linux programmers to develop a driver for the Cypress EZ USBFX that works in conjunction with the system USB driver stack.

Once you express interest well open up a new page on this site devoted to the effort. We plan to use existing tools like sourceforge.com, mail lists, and discussion groups to coordinate efforts.