Hi all,
I want to connect my pc audio to my arduino, I was using a freetronics crappy mic module, they have so much noise they are not much good for anything analytical.
I found a schematic in this thread: Connect audio signal to arduino input - #6 by macegr - Troubleshooting - Arduino Forum
I'm unsure of what is V1 and V2 are, also is 1N4001 or 1N4004 suitable for D1 and D2.
Also, that op-amp was unavailable. I have an LM358, and I also bought an NE5534P today.
Cheers, Chris.
EDIT: small images switched with big.