Hi,
I'm looking for a key that not only can switch but also detect if a finger is present on the key. Preferrably no touch-screen-like solution, but rather a piezo-electrical single key for PCB mounting. I've been searching the complete internet for the latter, without finding any solution. The nearest I come is a piezo switch that gives out open or close. Does anyone have any suggestions? Or comment why nobody invented a simple piezoelectrical key yet?
Thanks,
Aart