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Datahand Keyboard Resurrection

Discussion in 'Sensors and Actuators' started by mikeincousa, Apr 4, 2019.

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  1. mikeincousa


    Sep 5, 2016
    I purchased a Datahand keyboard ca 1999. With a rebuild maybe seven years ago it served me well. I purchase it as a prosthetic device. It helped me greatly with coordination and composition. I achieved a high level of words per minute with very high accuracy.

    Datahand suddenly went out of business some time after that. I am more or less a disaster with a standard QUERTY keyboard. The oversized ones help some but I do not come close to what I could achieve on the Datahand. I put a link at the bottom that will give the background. There multiple images in Googlel

    A little over a year ago the left thumb switch quit working properly. Then I thought it a problem with the IR relay. That key is the most used one and it could have simply worn out. I can get it to toggle one way once but it gets stuck somehow. I can manually reset and but I can only do it once again. It is has been over a year since I tired to use it so I am a bit rusty on the details.

    I later thought there could be something wrong with one of the IC's further into the circuit? I am sure they are primitive given today's technology. But I would think the device does not need the latest and greatest to function like new with a repair of some sorts?

    Along the way I have thought that replacing the relay or installing a TTL gate could fix the problem?

    I have not engaged in any serious bread-boarding for several decades. A few years ago I purchased an Arduino Uno but did not get past the basics. I thought that if push comes to shove the Uno or a device like it could bypass the stall.

    I had reason to think about extracting firmware a few months ago and that got to again think about resurrecting the Datahand.

    I need a lot of guidance and direction on this so I will appreciate any thoughts or experiences you might kindly provide. I have a lot of very technical / legal writing ahead of me. It would be very helpful to do that with the Datahand.

    Thanks for any thought or suggestions.
  2. wejn


    Apr 4, 2019
    If you search for “lalboard” and “Jesusfreke” in your favorite search engine, you will find an opensource datahand clone.

    All you need is a 3D printer and some soldering skills.
  3. mikeincousa


    Sep 5, 2016
    I am looking for a repair,not a replacement. This is major project beyond my skills and interests and time availability.
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