Monthly Archives: September 2013

Here are some interesting computer input devices that I am aware of. If you know of others please let me know.


KeyMouse Kickstarter

KeyMouse Grip

I think that there are a number of significant disadvantages to the KeyMouse. It is my experience that any minor problem can be tolerated for a couple of hours but after that it becomes annoying. Some of the potential problems I have identified below may appear to be trivial(I may be wrong and they may not even be problems) but in the long run, they become annoying.

I have made a number of assumptions and conclusions. Please let me know if I have got anything wrong.

How well does it work as a mouse and as a keyboard? This of course is crucial but they don’t spend any time talking about this. They only briefly show it being used. I would have liked to see a lot more. The video is impressive but avoids this crucial issue. I may be wrong but I didn’t find any specifications and these are important. I am going to make assumptions which may of course be wrong. Below are some of the problems I see. There are others but I want to be brief.

  1. I captured the photo above from their video. You will notice that the user’s thumb is bent. This is necessary so that the other fingers can reach the various keys. Here is a test you can do. Place your right thumb on the space bar. Keeping the thumb there try reaching the 7 key – it’s impossible even if you bend your thumb. So distance between keys is much less than the standard 19mm and also having to bend the thumb is clearly a problem.
  2. I think that during typing the palm will bump into the palm grip and inadvertently move the KeyMouse around.

Mouse Mode

  1. The user’s palm does not rest on the table and so mousing cannot be accurate.
  2. I assume (and I feel confident about this) that each KeyMouse is at least 200 grams. It would appear that one can get a good grip on the KeyMouse but 200 grams is a lot to move around. Over time this would be an issue.

Keyboard Mode

  1. The keys are vertically aligned and requires a significant learning and familiarisation period. I think this is a showstopper – people are too used to the standard QWERTY layout.
  2. They don’t specify the distance between keys. I assume that it is much less than the standard 19mm and once again is very different from a standard keyboard.
  3. Does the keyboard move around during typing? Even slightly? This may seem trivial but even if it moves slightly it is problem. It took a long time to solve this on Combimouse.  I think some keys are slightly angled and this could make the problem worse.



KeyMice website

This is similar to the Combimouse. They only advertise it for use with Android tablets. I think it has many problems but I have included it because of it’s similarity to Combimouse. Click here for the video.





Mycestro website

Leap Motion

Leap Motion website