/diy/ - Do It Yourself

>>1178774
>I'll have to start drawing this up

you better, coz you're confusing to read. i still dont get what you wanna do.

>The input device/computer has to think there's a mic on the other end by a few hundred µA travelling

so you put a load resistor on the output of the op-amp that'll suck out whatever current is needed by your sound card. see pic.

>the signal it receives must have that voltage bias to it

it only provides the bias voltage to power up the mic, it doesnt need to receive it back. in any case the cap on the output of the op-amp will block any DC level going to the computer. see pic.

>I saw the LM386 datasheet, that 4V isn't ±4V but 4V total?

it's 5V total (except if you get a special part, lm386n-4, which is 4V total)