Hi,

I want to make a sound sensitive switch with a PIC. It needs to have variable sensitivity.

What i'm thinking is, use a PIC with a AD converter, and compare the AD reading against the currently set sensitivity variable.

What i'm not sure about is how to connect the microphone. Connecting the mic directly to an I/O pin surely wont work. I'm assuming i'd need some kind of amplification, but I have no idea where to start.

Does any1 have any ideas?