How do the buttons on a calculator work? Answered
My calculator has these black lines (under all the buttons) that are very close but not touching in wavy designs right on the PCB. How do these buttons work? Is there a way I hook up a SMT push button to this?
Like I mentioned before, both my calculators have these black traces. Is this a covering over the copper? How would I get to the actual copper? Do I try to sand off the black?