[Coco] Coco KB membrane replacement

[Dave Philipsen]

Or use a little SMD tactile switch on the PCB that actuates with very 
little pressure?



On 5/14/2017 4:15 PM, Dave Philipsen wrote:
> This makes me think:  If I understand its operation correctly, there 
> are just two pieces of mylar with conductive traces and pads on each 
> side.  The pressure of the key causes a pad on one layer to connect 
> with pad on the other layer.  Why not design a PCB with some sort of 
> small domed cap or other conductive material which shorts a couple of 
> pads on the PCB, when pressed, at each key location?
>
> Dave
>
>
> On 5/14/2017 3:22 PM, RETRO Innovations wrote:
>> On 5/14/2017 1:35 PM, RWAP Software wrote:
>>> Is the membrane an actual hard PCB rather than a plastic membrane 
>>> (with silver tracks)?  Sending a picture would be an idea
>> Chris' website shows the KB membrane:
>>
>> http://www.insentricity.com/a.cl/210/the-future-of-the-membrane-empire
>>
>>>
>>> I have never looked into replacement PCB membranes and so far as I 
>>> know, the supplier I use does not provide these (because they 
>>> specialise in small quantity membrane keyboards), but might know a 
>>> producer.
>> If they specialize in membrane KB assemblies, they'd be a perfect 
>> choice to get a quote from.
>>
>> Jim
>>
>
>