From: RussellMc <apptechnz@gmail.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
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Date: Mon, 3 Aug 2020 05:30:09 -0700
Subject: Re: [EE] "Tactile" spec?
Thread-Topic: [EE] "Tactile" spec?
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On Sun, 2 Aug 2020 at 03:02, Neil <picdude3@narwani.org> wrote:

> Is there some way to tell from a datasheet if a switch is "clicky"/tactil=
e?
>
> As others have noted - "tact" switches are liable to suit. Others may.

Possibly worth noting - if operating force range is of concern then
specifying it may be a good idea.

I long ago had a batch of  multi layer mylar keyboards made. Non tactile.
Maybe 50? keyboards - NZ made so not overly cheap.
3 layers - x contacts on top layer , y contacts at 90 degrees on bottom
layer and a hole at key locations in middle layer.
Laminate / glue.
Operating force depends on hole size, material and middle layer thickness.

I had a very specific requirement for operating force.
I wrote a spec re operating finger size and operating force.
I took the really-didn't-care manufacturer through it line by line and got
a spec signoff.
The resultant keyboards were all several times higher in operating force
than per spec.
I had him redo them.
The originals would have been usable in 'normal' applications but were
non standard enough that odds are he just wrote them off.


     Russell
--=20
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