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Topic: Button pad out of silicone or rubber (Read 8 times) previous topic - next topic

funkyguy4000

Hmmm, I'll add this on to my list of motivation to make awesome apps for money so that I can buy a rep rap
Accelerate to 88 miles per hour.

Far-seeker


Those black rings you see on the part from SparkFun are likely the conductors - generally they are carbon-impregnated rubber (not sure where or if you can easily buy that - but I bet some googling would turn up something). You mainly want something that isn't going to corrode or degrade over time. You might be able to make your own by following something like this:

http://www.instructables.com/id/Make-Conductive-Glue-and-Glue-a-Circuit/
http://www.inklesspress.com/conductive_glue.htm


I would image that thin stainless steel washers with the proper inner and outer diameters would also work.  Perhaps not as well but they'd be eaiser to get than the carbon-rubber rings, and might be easier to work with in a confined space than the conductive glue.

funkyguy4000

Oh thats true, although every time you press a button, you'd hear a "clink" noise and it would be a lot heavier, wouldn't it?
Accelerate to 88 miles per hour.

Far-seeker


Oh thats true, although every time you press a button, you'd hear a "clink" noise and it would be a lot heavier, wouldn't it?


Well it would make the button array measurably heavier, but I don't think enough to matter during use.  I think any noise would depend on a few things, like how far the washer actually moves, how much force is used, and how thick the silicone rubber around it is.

However, I think I might have found something even better...  How about flat copper washers only around 1 mm thick?

funkyguy4000

Would I just glue them on?
GORILLA GLUE!
Accelerate to 88 miles per hour.

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