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- Notebook keyboards ?
October 6, 2009, 3:07 am
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This query perhaps applies to desktop-PC keyboards too.
My notebook's 3 keys on the left botton: Ctrl, Alt, Fn started getting
unreliable and then failed. When I opened it up, I saw, as expected
that these 3 keys are the only ones on one of the 'ribbon's tracks'.
So obviously if the continuity was broken after the key closest to the
connector, then all 3 keys would fail.
But what I'm realy interest to know is what technology is used ?
Is it galvanic [actual contact] or capacitive ?
The 2 transparent plastic-sheets with the tracks 'meeting' at the
'key-points' are 'sealed together' so I can't see/feel what's inside,
at the actual 'key-points'.
If the key-press causes the top-sheet's track to connect with the
bottom-sheet's track, then what keeps them apart when no key
is pressed ?
The one plastic track-sheet, mounts against an aluminum plate
which might be relevant if capacative-pulsing is used.
Thanks for any explantion/s on the workings of this strange thing.
Re: Notebook keyboards ?
On Tue, 06 Oct 2009 01:42:01 -0400, Paul rearranged some electrons to say:
The old IBM buckling-spring keyboard is the best one I ever used. I
still have my old IBM-PC keyboard, one of these days I'll make up an
adapter to map the old keycodes and format into the AT(PS2) standard,
just haven't had time to get around to it.
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