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Attention: RC-CAM.com will be closing down August 2021.

The RC-Cam.com forum was the very first online community dedicated to the advancement of wireless video cameras on radio controlled (R/C) models. This is now called "FPV" (First Person View). We are proud of the contributions that our members have made to the FPV hobby.

We've seen significant changes over the last twenty years. Initially there were a lot of eager R/C hobbyist that built their own video systems. Allowing these creative individuals to share their work was the purpose of this site. Now the FPV market is flooded with low cost systems; Sadly DiY FPV video projects are now rarely discussed.

RC-CAM.com (main site and forum) will be closing down August 2021. This was announced several months ago (March 2021) to allow our members ample time to download any information that is important to them. After the site is shutdown the information will no longer be available here.

We appreciate every member's involvement with advancing the FPV hobby. It is indeed sad to say goodbye to all our online friends. Be safe and stay healthy.



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MPJA had some nice small microphone boards a few years back. I used them on a couple small camera systems. I did not see the exact same boards this time, but they do have something that might be usefull. here.:



They are about $5 each. It is just a little bit larger than what I had earlier.

Perhaps someone else may chime in with an alternative.


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This is the board you need

I found my old order reciept from MPJA and got the item number for the audio board. Its even cheaper and smaller than the one I first posted. And.... I am not really sure if the other one will work for what you want. This one will for sure.


Here is the page at MPJA for the audio board.


I ordered about 5 at the time as they are nice little boards to stash in the electro parts bin. They should give a wireing diagram sheet with the purchase.


Edited by arrio
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  • 1 month later...

Well, I didn't know if these components were sensitive enough to need an exact regulated power supply.

More Mic questions......both of those listed are over my voltage.......has anyone used the 1st one listed on a 5v system? Do you think the last one 12v would do anything powered up on 5v?

Edited by blkonred
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Hi Paul,

I don't know what to tell you. I used it for my application, which was a 9-12 volt system, and it worked great. I don't know if your 5 volts will be enough to push the circuit. You could get it and try it out. If it doesn't work out, you could resell it in one of the forum classifieds or toss it into your parts box for a future project. Either way, its the easiest solution so far, and I'm at a loss for another option.


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  • 1 month later...

hi, with moving on from the 'toy' CMOS cameras to CCD cameras I lose the audio feature most CMOS cameras have, the MPJA board looks ideal for my needs but their international shipping policy is a little OTT (I'd have to spend a min of $100, what would I do with 33 mics?)

Are there any other cheap mic boards available?

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  • 2 months later...

I did eventually find some decent microphone boards in the UK, first some £2.99 ones from Maplins which work fine at voltages from 8v to 12v:


Also there's some more expensive (and larger) mic boards which are better than the Maplins ones and work at 5v to 12v:


edit: I just finished installing one of the Maplin audio boards inside a miniature wireless day/night infra-red LED camera, the normal mic amplification on the CMOS board is pretty useless but with the Maplin board it picks up audio very well.

I did have to wrap some tin foil around the 50mW transmitter & audio board to stop audio inteference though, the foil top of a jelly pot (jello to the US crowd) worked perfectly :)

Edited by Haku
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