Nobody replied yet. Very strange!
Anyways, I will wait for your responses.
Simply put I have a mic preamp that works very well with Arduino uno board, but when I connect the same preamp with a 5v/16mhz pro mini, it introduces unacceptable amount of noise.
I read on ADCs and it says AREF should be connected to ground with a 100nf. In the pro mini board there is no AREF pin externally available?
Any ideas how to provide noise immunity to pro mini?
Thanks,
Debojit