Author Topic: Bluetooth to aux for plasma speaker circuits  (Read 90 times)

Offline John123

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Bluetooth to aux for plasma speaker circuits
« on: November 16, 2022, 03:00:54 PM »
Hi, been away for while but back messing with electronics again  :)

Has anyone tried those bluetooth to aux adaptors to get an audio signal into their high voltage projects? These are the things I'm talking about.

I'm finding they have a lot of background hiss which makes the plasma speaker sound worse than it actually is (I've isolated it to the bluetooth adaptor).

Problem is these days phones all have touch screens which makes them behave weird when directly connected to such RF heavy high voltage projects so isolation is needed, old dumb phones with buttons behave when connected directly using an aux cable but then you can't use youtube videos for audio content on the fly with such old devices.

Only thing that helped was to heavily passive RC low pass the input at the plasma speakers aux jack (hiss from the bluetooth is still there but nowhere near as noticable in the arc), but the corner cutoff frequency is right down around 30khz so it cuts into the audio range too.

Is there some elaborate filter circuit I could use or maybe even some chokes to filter out this bluetooth induced hiss? Or maybe someone has found a bluetooth to aux adaptor which has clear hiss free audio.

Please share thoughts and ideas here.
« Last Edit: November 16, 2022, 03:09:30 PM by John123 »

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Bluetooth to aux for plasma speaker circuits
« on: November 16, 2022, 03:00:54 PM »

 


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