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Registered Member #3781
Joined: Sat Mar 26 2011, 02:25AM
Location:
Posts: 701
As many of you know, I have been working on various designs of plasma speakers since early this year. I have finally found a design I really like. This is a work in progress and I will update this thread as time goes on.
I finished the modulation circuit: pics below, I apologize because some of them are blurry as I was in an awkward place to take pictures.
Complete set up: Outputs 1 and 2 from the TL494: Everything connected: Just the boards:
I would like to personally thank Dr. Kilovolt, 2many, and Magnet18 for all the help they have given me. But of course, a big thanks to everyone who keeps this forum interesting and is willing to lend a hand
Registered Member #3781
Joined: Sat Mar 26 2011, 02:25AM
Location:
Posts: 701
In the picture they were connected to the Oscilloscope. When it's finished, each output will be connected to a Mosfet driver board which will be connected to a separate transformer, probably homemade so the transformers produce identical arcs.
Registered Member #2838
Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333
Any progress since you posted your first photographs? I have always wanted to make a small plasma speaker but have never found a good circuit or flyback that I felt suitable. If you do end up winding your own HV transformers I would really like to see how it goes.
Registered Member #3637
Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
Oidium45 wrote ...
Any progress since you posted your first photographs? I have always wanted to make a small plasma speaker but have never found a good circuit or flyback that I felt suitable. If you do end up winding your own HV transformers I would really like to see how it goes.
Actually....you can use a 555 timer and some UCC2733x chips as drivers + a GDT for a plasma speaker. It works really well.
Registered Member #3781
Joined: Sat Mar 26 2011, 02:25AM
Location:
Posts: 701
Oidium45 wrote ...
Any progress since you posted your first photographs? I have always wanted to make a small plasma speaker but have never found a good circuit or flyback that I felt suitable. If you do end up winding your own HV transformers I would really like to see how it goes.
I have started on the driver, I am using UCC37322 Mosfet drivers and a GDT like induktion said. I wouldn't use a 555 as I have found them unreliable at best and a TL494 is just as easy to use. I will update the post when the boards are done.
I have found a few suitable flybacks but the ones I have used in the past can't really handle anything above 18v and thus the arc size is limited to a very thin 3cm, I want an arc that's a bit longer and thicker; as a thin arc tends to move around a lot.
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My first really big project (Plasma Speaker)
