[Sugar-devel] seeking help to enable nepali keyboard input for XO-4

Sameer Verma sverma at sfsu.edu
Mon Jun 16 21:25:13 EDT 2014

On Mon, Jun 16, 2014 at 6:19 PM, John Watlington <wad at 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 <wad at 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!).


> 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
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