Hi all. I've just started playing around with my microcontroller. I built the electret pre-amp presented here: http://www.minidisc.org/mic_preamp/Simple Stereo Electret Mic Preamp.htm I would like to take the output and feed it into my sanguino. When I monitor the value being register on the analog pin (10 bit ADC) via serial comm, they mostly seem to float between 300 and 400. When I ground both circuits together the analog pin stops drifting, but if the mic single is coming through at all, it's barely more than one or two increments. Do I need more gain? Any general suggestions welcomed. Cheers, L.
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