I have this electret microphone: http://www.farnell.com/datasheets/1505849.pdf
And I've put it onto a 3.5mm TRRS (4 pole) jack to go into the iMac headphone jack. For the iMac to recognise/accept the mic it needs to be wired with a 10k resistor in parallel and speakers must be 'faked' bz using 33ohm resistors for left/right lines.
It works well but the signal is weak. How can I amplify the signal just a little bit? This is a dirty prototype project and it's not about quality but just about the concept so the easier/quicker/the less parts involved, the better.
I think there is 2V coming out of the headphone jack for the mic but I'm not sure. Is it possible to amplify the mic without using an external battery/energy source?
I tried this circuit but there was just no signal anymore?