I try to make a detector that reacts when the ball hits the net in a tabletennis game.
I do it now with a piezo ceramic sensor of 27mm and it works reasonable fine.
I connect the signal pin to an analog input pin and if the value is greater than 0, I set an LED on for some time.
I see that the piezo ceramic discs comes in a great variation of diameters from 10mm till 50mm.
Wath is the difference between them? To make it more accurate, can I better take a larger sensor or just the opposite?
Many thanks in advance,