Suresh P wrote: > Why not a touch screen? A few reasons:
- at that size, there's very little space for fingers, even if you make the touch area a bit larger than the display, - may be quite difficult to find a touch panel of that size (and I don't think it's something one could DIY), - very limited haptic feedback, - if resistive, you have to choose between protecting the display's glass and closeness of the touch panel plane to the display plane. If capacitive, the technology gets complicated. In any case, a touch panel would complicate the mechanical stacking. Mechanics are where us Open Hardware types are the weakest, so I'd tread very carefully where. > My idea is: Hmm, that seems to be a somewhat different and probably larger device. If you want to try something with a touch screen, I don't think you really need hardware buttons besides it. Just make the panel larger than the display, then print your "hardware" buttons under the touch panel. > 3. Every third unsuccessful attempt to hard unlock will factory > reset the device clearing all the data. I never liked those "three tries and you're dead" systems. They also allow for denial of service attacks. I'd just enforce increasingly larger delays and have a higher threshold for tries. You still need one in case someone manages to tweak the delays. Of course, all this can be made configurable, a firmware build option, you could have an alternative firmware, etc. - Werner _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
