Hey guys, I'm having problems trying to read a piezo element, it does the job when I tap it with my finger but I need a little more sensitivity.
The piezo is connected to A0 and grown with a 1Mohm resistor in parallel.Piezo Element - SEN-10293 - SparkFun Electronics
The threshold has to be around 30, and I would like to know if I can amplify the signal a little bit to have a better reading with out damaging Arduino's input.
Thanks.
You won't damage the arduino input as long as you don't amplify it over 5V. Use a simple transistor amplifier or an OpAmp.
Piezos can generate quite high voltage (over 5V). In this case, you'll need a 5.1V Zener diode as protection.
What are you trying to read?