Does anyone have a suggestion for entering a large number of operator inputs on a watch?
I am not sure what the typical watch pushbutton lifetime is but since they are normally only used occassionally to set time, date, etc and because of their very small size I suspect that the maximum number of operations is relatively small. Maybe 10,000 operations? (just a guess on my part - the manufacturers that I have contacted do not spec this).
A small joystick similar to the one on the Butterfly (200,000 operations) might be OK and are readily available. I like the tactile feedback and it works well on a watch for my application. But packaging it into a watch case and making it waterproof (or at least moisture proof) might be challenging.
Recently saw an optical joystick on an Android (it uses firmware to monitor the movement of the fingerprint across a sensor) which would be ideal but it may not available as a stand-alone product. (Google finds all the smart phones but not the joystick.)
Maybe just beefing up the pushbutton contacts is the best way to go?