Hi,
This is OT but I'm sure many of you have used piezo microphones sometimes.
I've often connected a piezo transducer to the microphone input of my computer (and other computers) by simply soldering the two wires to the T and S of a minijack plug, and it works just fine and my soundcard hasn't suffered any damage (apparently at least).
However, I am concerned that a strong sound input (e.g. hitting the piezo transducer with with fair strength) may actually generate a voltage peak (thought only for a short time) capable of damaging the soundcard, couldn't it?
Also, a friend of mine did the same with his Macbook and his headphones output has stopped working (may be just a coincidence though).
Is there an easy way to make it safer? I seem to remember I had read somewhere (can't find it) about connecting a 1MOhm resistor in parallel... woudl that do the trick?
thanks m.