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Old Aug 28, 2013, 11:53 PM
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Home DIY FPV microphone?

Anyone knows how to make an FPV mic powered at 3.3V? Been googled around found nothing. I usually bought bunch at foxtech "minimic" but kinda annoyed its been out of stock for month. I wanted to stick it on my nano 5.8ghz vtx that has 3 wires going out for mic. Normal household mic have only have 2 wires going out. So how do i get around building mic that support 3 wiring (-,+,signal) into my nano 5.8ghz vtx at 3.3V?
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Old Aug 28, 2013, 11:56 PM
flying ninja!
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Oh btw mic doesn't need to be amplified, just enough to hear the prop rpm that's all and small enough for my micro fpv pocket quad.
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Old Aug 29, 2013, 11:11 AM
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You could re-purpose an old earbud as a dynamic mic, which wouldn't require power. It wouldn't be very sensitive, but this may actually be to your advantage given how loud the motor / airflow is. Making a powered condenser mic would likely be more difficult.
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Old Aug 29, 2013, 01:31 PM
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fwiw, you can get them pretty cheap

http://www.rangevideo.com/index.php/...icrophone.html

just 1 example, I think RMRC has a similar unit.

I had asked the same question a while back, but for 10 bucks, its hard to justify bothering with DIY, the parts would almost surely cost more and it wouldn't be as neat.
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Old Dec 09, 2014, 09:10 PM
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Quote:
Originally Posted by Innominate View Post
You could re-purpose an old earbud as a dynamic mic, which wouldn't require power. It wouldn't be very sensitive, but this may actually be to your advantage given how loud the motor / airflow is. Making a powered condenser mic would likely be more difficult.
So I just connect the ground and + of the earbud as ground and audio on the vTx, thats all?

That would be so awesome!
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Old Dec 11, 2014, 05:40 PM
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Has this been tried? Best, Aero
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Old Dec 11, 2014, 06:40 PM
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Has this been tried? Best, Aero
I would test it on saturday, but not sure I could fry my IRC vTx by doing so..
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Old Dec 11, 2014, 07:40 PM
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Hope not! Maybe someone has tried it before and will chime in. Would be a simple way to get sound from a dollar store set of earbuds Best, Aero
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Old Dec 11, 2014, 07:46 PM
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I started flying FPV with a GoPro and am loving it... now that I bought a Sony 960 I am not sure I can fly without sound...
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Old Dec 11, 2014, 08:46 PM
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Agreed on flying with sound! I just tried an experiment. Cut an earbud off an old pair from the dollar store. Stripped back the 2 wires and soldered them onto the audio pad and ground on my TS5823 tx. Fired it up and alas no sound from my amplified RC800 monitor. Reversed the wires but still no audio. May have to go with one of the nano mikes like the one from FPVHobby. http://www.fpvhobby.com/171-3-5v-nano-microphone.html Has anyone tried this mike? Best Aero
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Old Dec 12, 2014, 03:08 AM
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As far as I know with no amplification you would have to literally scream into it to hear something, did you try that as well?
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Old Dec 12, 2014, 07:59 AM
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Better, I ordered one of the nano mikes to add to my micro FPV set up
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