[Coco] Coco KB membrane replacement

[Scott Wendt]

I think they might feel better than the membrane on the coco as they have more tactile response. I'd be worried about the domes being crushed by use and having a short lifetime but I don't know how to test that without building a keyboard.

________________________________
From: Coco <coco-bounces at maltedmedia.com> on behalf of RETRO Innovations <go4retro at go4retro.com>
Sent: Sunday, May 14, 2017 5:55:35 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] Coco KB membrane replacement

On 5/14/2017 6:06 PM, Scott Wendt wrote:
> 50 grams is basically the force required to press a cherry keyswitch, so it doesn't sound out of line. Not sure how it would work with the plastic bits in the coco keyboard though.
The PCB would nee to sit a few mm farther away from the plastic portion
of the KB
>
> Something like this may be more appropriate though: http://www.snaptron.com/products/dome-arrays/
>
> Dome Arrays - Snaptron<http://www.snaptron.com/products/dome-arrays/>
> www.snaptron.com<http://www.snaptron.com>
> Our metal dome arrays, called Peel-N-Place™ Arrays, are pre-loaded polyester dome carriers backed with pressure sensitive adhesive. Arrays come loaded with the dome ...
I was worried that those would have a terrible feel to them (I initially
thought of them and a regular FR4 PCB.  But, they have a free sample
box, so I will get one, lay out a small board, and try them.


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