LPF and AMP for ADC with op amp not giving sufficient gain
Thanks for the help!

It turned out that the guy at my electronics store had supplied me with wrong value resistors so that's the reason it didn't work. Got it to work now, allthough it will still need some fine tuning and adding the filtering part. Below are pics of amplified signals

500Hz sine wave at MIC input:



1kHz sine wave at MIC input: