My Canon camcorder has an external mic jack, but the jack provides no power that would allow for using electret mics, which I already have several of. So of course when I plug one of those in, I get no audio. A wireless mic, however, works fine because its receiver is battery powered.
I just assumed I could find a little $2 inline adapter thingy on Ebay that had a coin battery compartment, or maybe two AAAs, and a couple resistors and capacitors, and two 3.5mm stereo jacks, or maybe an input jack and an output plug.
But I have not been able to find anything like that, even at a higher price. So maybe this is not a thing. Has anyone seen anything like this?
If not, I guess I'll make an Altoids version.