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Composite Display Noise

Posted: Tue Jun 14, 2016 3:35 pm
by Sprockett
Has anyone had any luck reducing the noise going from the PI composite to the 3.5" monitor?

I tried wrapping it in thin foil, didn't make any difference, do I need a choke coil? (have to be a hell of a small one)...

Arg :oops:

Thanks

Re: Composite Display Noise

Posted: Tue Jun 14, 2016 4:40 pm
by wermy
It's in Spanish, but someone pointed me to this project a while back -- they do some filtering on theirs. Been meaning to try it:

http://arananet-net.kinja.com/gearpi-la ... 1742518721

Re: Composite Display Noise

Posted: Tue Jun 14, 2016 6:21 pm
by nsqpdn
wermy wrote:It's in Spanish, but someone pointed me to this project a while back -- they do some filtering on theirs. Been meaning to try it:

http://arananet-net.kinja.com/gearpi-la ... 1742518721
The filter they're using is to reduce the noise from DC power, not form the video source.
One idea that i has turning around would be to twist the connections, making a twisted pair. I don't believe itwill make a great difference, but I believe that some of the noise could be reduced.

Re: Composite Display Noise

Posted: Tue Jun 14, 2016 6:28 pm
by wermy
nsqpdn wrote:
wermy wrote:It's in Spanish, but someone pointed me to this project a while back -- they do some filtering on theirs. Been meaning to try it:

http://arananet-net.kinja.com/gearpi-la ... 1742518721
The filter they're using is to reduce the noise from DC power, not form the video source.
One idea that i has turning around would be to twist the connections, making a twisted pair. I don't believe itwill make a great difference, but I believe that some of the noise could be reduced.
Hah, that's what I get for not actually translating/reading it. :) someone had sent it to me a while back saying it would filter the composite signal.

Re: Composite Display Noise

Posted: Wed Jun 15, 2016 10:03 am
by Sprockett
I didn't think of the twisted pair, that's a great idea!

I'll try that tonight and report back, I'll also try it wrapped and unwrapped...

Thanks!!