I am new to this stuff, and I'm building a rain sensor.
I'm using a piezo buzzer from digikey http://parts.digikey.com/1/parts/47-buzzer-piezo-element-6khz-44mm-ceb-44d06.html
to collect information about raindrop events. The problem is that the voltage output from these drops is too low for arduino to read.
I think that I need to amplify the signal somewhere between 10 and 100 times (I am not sure exactly how much because I still need to do field testing).
An op-amp was suggested to me, but I don't know how to implement that.
Right now, I have the positive line from the piezo element going to analog; the negative goes to ground, and a 100 kohm resistor connects the positive and negative lines.
For these op-amps, it looks like there are many more lines, but I just really have no clue about how they work, how I would wire it, or what size/kind I need.
Thanks for the help!