On Mon, Jun 16, 2014 at 6:19 PM, John Watlington <w...@laptop.org> wrote: > > On Jun 16, 2014, at 9:05 PM, Walter Bender wrote: > > On Mon, Jun 16, 2014 at 9:03 PM, John Watlington <w...@laptop.org> wrote: >> >> >> Walter, >> You remember correctly. The hard/clicky/crunchy keyboards are not >> rated >> for as long a lifetime as the membrane/chewy keyboards. While the >> membrane >> keyboard design was tested to 5 million key presses, IIRC the clicky >> keyboard is >> only rated to 1 million key presses. (On the other hand, it takes one >> minute >> to replace a clicky keyboard versus twenty for a membrane keyboard.) > > > ..if you have a replacement keyboard... any insight into how easy it would > be to make replacement keys in the field? > > > I would say impossible, but that would be underestimating the creativeness > of > our deployments. > > At the electrical level, the crunchy and chewy keyboards have the same > contacts, > so I don't expect that to be the failure mechanism. Failure should be due > to the > mechanical parts (as it is with the membrane keyboards). If you pull off > the keycap > and the guide mechanism, the key still activates when you press on the > membrane > or the rubber cap (which provides both the spring action and presses on the > contacts) > glued to it. >
Back in January 2013, while visiting Khairat (India) I saw a couple of girls using the eraser end of a pencil to push the torn keys on their XO-1s from 2007 (which BTW still hold charge and run the mesh!). Sameer > Cheers, > wad > >> WARNING: The clicky keyboard was not approved for use by small children >> by UL. The reason is that if the keys are pulled off they present a >> choking >> hazard. >> >> Cheers, >> wad >> > > > _______________________________________________ > Sugar-devel mailing list > sugar-de...@lists.sugarlabs.org > http://lists.sugarlabs.org/listinfo/sugar-devel > _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel