Simple Microphone amplifier/filter

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi all,

I'm pretty sure this is a very posted question, but I could not find the answer using the search box.

I need a very simple mic amplifier, which could have a non flat response.

I just need it sensible enough (but also noise proof enough) to detect drops splashing or some other noises, to trigger a camera.

I found on the web several examples, but I think many of them over perform for my purposes.

It would be nice if the sensitivity could be electronically controllable by the arduino (but if the output is logarithmic, well, I don't need it).

Any hints?

2

Hi,

try this
http://www.analog.com/static/imported-files/data_sheets/SSM2166.pdf

connect the output of the circuit to an analog input of the arduino.
You can do the sound recognition depending from the level in software.

Mike

3

tnx, I'll have a look to the datasheet.

Maybe I'll build a "preampli" module which I'll re-use for several projects.