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Thread: copper around a mutlicopter flight controller

  1. #1
    Kiwi in Germany whakahere's Avatar
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    copper around a mutlicopter flight controller

    I am not going to pretend I know much about this but after chatting to FPVsam he thinks that putting copper around my CC3D might effect the tiny gyros on the board.


    The reason I put copper tape around it is to stop any noise on the 433mhz band. From another thread people have found that the naze32 does put out some noise on this band. CC3D is pretty much the same hardware and since I have some copper tape ... why not

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    Bling CC3D

    Because the copper is not grounded will it reflect the noise back to the board and therefore effecting how the gyros work? If this copper case is grounded will this stop the noise being radiated out and not reflected back?
    Whaka's Tinkerings blog --> http://fpvlab.com/forums/showthread.php?36623-Whaka-s-Tinkering&p=631753#post631753
    Battle H Virus (home build basher quad tutorial) --> ]http://fpvlab.com/forums/showthread.php?12544-Tutorial-Battle-H-Virus
    Range record on 5.8ghz 200mw 24km --> http://www.rcgroups.com/forums/showthread.php?t=1441664

    The one thing I know how to do well with FPV - crash. All in a day of fun!
    I believe landing is a full body experience .... I do my best to aim for your body.

  2. #2
    I Like Waffles... SENTRY's Avatar
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    1st of all. Go backwards to the old ground tests. What are the results?
    "I Like Waffles" : FPVLab on Facebook and FPVLab on Twitter

  3. #3
    Kiwi in Germany whakahere's Avatar
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    I know ... broke my own rule .... you know I didn't test it first I just got happy with some copper tape
    Whaka's Tinkerings blog --> http://fpvlab.com/forums/showthread.php?36623-Whaka-s-Tinkering&p=631753#post631753
    Battle H Virus (home build basher quad tutorial) --> ]http://fpvlab.com/forums/showthread.php?12544-Tutorial-Battle-H-Virus
    Range record on 5.8ghz 200mw 24km --> http://www.rcgroups.com/forums/showthread.php?t=1441664

    The one thing I know how to do well with FPV - crash. All in a day of fun!
    I believe landing is a full body experience .... I do my best to aim for your body.

  4. #4
    I Like Waffles... SENTRY's Avatar
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    LOL. *smack on the hand* You know better.
    "I Like Waffles" : FPVLab on Facebook and FPVLab on Twitter

  5. #5
    Navigator QUAD4EVER's Avatar
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    Quote Originally Posted by whakahere View Post
    If this copper case is grounded will this stop the noise being radiated out and not reflected back?
    Absolutely. This is exactly how it works. The signal is energy and needs somewhere to go. Grounding the shield will send the energy to ground.

  6. #6
    I Like Waffles... SENTRY's Avatar
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    ^ The signal does not always "need" somewhere to go. Please understand the difference between EMI, RFI, and conducted RFI. You do not need to ground the copper as the total electric field will be equal to zero (unless the current flow somehow magically overwhelms the conductivity of the cage - which is this case is unlikely).
    "I Like Waffles" : FPVLab on Facebook and FPVLab on Twitter

  7. #7
    Kiwi in Germany whakahere's Avatar
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    This is the knowledge I am missing to push my system that extra few steps. Understanding where EMI, RFI and conducted RFI comes from and the best methods to limiting each and what that noise can effect. Any idea where I can find a basic run down on these?

    So will this copper shield do anything? will it be counter productive?
    Whaka's Tinkerings blog --> http://fpvlab.com/forums/showthread.php?36623-Whaka-s-Tinkering&p=631753#post631753
    Battle H Virus (home build basher quad tutorial) --> ]http://fpvlab.com/forums/showthread.php?12544-Tutorial-Battle-H-Virus
    Range record on 5.8ghz 200mw 24km --> http://www.rcgroups.com/forums/showthread.php?t=1441664

    The one thing I know how to do well with FPV - crash. All in a day of fun!
    I believe landing is a full body experience .... I do my best to aim for your body.

  8. #8
    Navigator WNCmotard's Avatar
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    I didn't see any noise on the CC3D on the 433 band with an RF explorer, but I did see quite a bit on 432. This was tested with the flight controller only out of the quad, nothing else powered up.

  9. #9
    Kiwi in Germany whakahere's Avatar
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    I am taking it out of it's copper box and testing it without anything else. See what noise it produces in and out of the box. See what i can find.
    Whaka's Tinkerings blog --> http://fpvlab.com/forums/showthread.php?36623-Whaka-s-Tinkering&p=631753#post631753
    Battle H Virus (home build basher quad tutorial) --> ]http://fpvlab.com/forums/showthread.php?12544-Tutorial-Battle-H-Virus
    Range record on 5.8ghz 200mw 24km --> http://www.rcgroups.com/forums/showthread.php?t=1441664

    The one thing I know how to do well with FPV - crash. All in a day of fun!
    I believe landing is a full body experience .... I do my best to aim for your body.

  10. #10
    Navigator QUAD4EVER's Avatar
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    Quote Originally Posted by whakahere View Post
    Any idea where I can find a basic run down on these?
    Not meaning to sound rude, but I recommend google'ing the phrase "EMF RFI shielding". This is how I did it. Read for days. Just be forewarned that you will encounter a lot of links for "tinfoil hat" products.

    Below is a link to get you headed in the right direction -

    http://www.learnemc.com/tutorials/Sh...Shielding.html



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