I'm using a Piezo Film Sensor
MiniSense 100
to detect vibration and am connecting to an input pin designed for up to 3.3v. This sensor can generate up to 90v (have not been able to measure anything near this).
Playing around, I discovered that a 470ohm resistor in parallel with the sensor keeps the voltage manageable. While this seems to work for my application, what can I do to ensure that the voltage never exceeds 3.3v? do I need to worry about this?
Thanks for humoring me on what may be a question with an obvious answer to some of you.
MiniSense 100
to detect vibration and am connecting to an input pin designed for up to 3.3v. This sensor can generate up to 90v (have not been able to measure anything near this).
Playing around, I discovered that a 470ohm resistor in parallel with the sensor keeps the voltage manageable. While this seems to work for my application, what can I do to ensure that the voltage never exceeds 3.3v? do I need to worry about this?
Thanks for humoring me on what may be a question with an obvious answer to some of you.