Mobius internal microphone for real time audio

[Beachflyer]

Here is my thought. When I'm driving my Summit FPV and get around people they talk to the truck as if I can hear them. Usually nice, funny, or helpful type conversation. I don't know they are saying things until I get back and upload the HD video with sound from the Mobius.

The internal mic on the Mobius picks up sound very clearly. So I was wondering if it would be clear if I sent it back thru the Vtx audio line. I'm going to make the wiring modifications I need tonight. But was wondering if anyone else had tried this and how clear the audio was real time.

I don't use the Mobius as my primary FPV camera but I can switch to it to see that perspective.
I have 3 cameras actually, front facing with 180 degree pan, rear facing, and the Mobius on top.
I then have a 3 way camera switch.

I will take the audio out from the Mobius and wire straight to audio in on the Vtx. So if it works I'll have audio constantly no matter which camera I select.

Would like to hear from anyone who has tried this or similar and if it is audible.

[xjet]

You'll have to do some reverse engineering to find a spot (if there is one) where there's sufficient audio level to feed in to the VTX.

Why not just use a VTX that has an inbuilt mic -- there are plenty of them.

[Beachflyer]

Thanks Xjet,

Yeah I have been looking at those. HobbyWireless has a 1 watt Vtx with built in mic.
Problem is because it is a ground pounder and I'm mostly running in dense trails I need all the Vtx I can get paired with directional antennas on the ground station.

Not sure im clear on what you mean by "sufficient audio level". Could you explain a little.

[Beachflyer]

Okay, the Mobius audio connection did not work. Just got a low humming buzzing sound.
Can I just connect an external mic to the Vtx audio in jack? Seems the mic would have to be powered. Thinking out loud.
Research time!

[RonSII]

All you should need is an LM386 opamp and a couple caps/resistors... there is probably even a simple opamp board out there for arduino/adafruit/etc...