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Jan's Plasma Speaker! Woo! Too!

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indiana
Thu Apr 02 2009, 04:37AM Print
indiana Registered Member #2009 Joined: Tue Mar 03 2009, 07:07PM
Location:
Posts: 43
I started playing with the better output version of jan's plasma speaker.

Hopefully I nail this board first time. ;)

Going to build the first version first, and once my oscilloscope gets here, I'll build this one. (the "better output section")

schematic: Link2


1238647017 2009 FT0 Plasma Speaker Better Output
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Dr. Dark Current
Thu Apr 02 2009, 05:17AM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
The power part should really be completely isolated from the control part so you can ground the control part to earth, but it is not completely necessary.
Also, the capacitor in series should be at least 1uF (NON-electrolytic).

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indiana
Thu Apr 02 2009, 07:39AM
indiana Registered Member #2009 Joined: Tue Mar 03 2009, 07:07PM
Location:
Posts: 43
like so?
1238657889 2009 FT66912 Plasma Speaker Better Output
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MRacerxdl
Thu Apr 02 2009, 01:57PM
MRacerxdl Registered Member #989 Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
Yeah, if you open a few computer PSU's or other PSU's, you will see that the part after (the low voltage) the transformer are complete isolated from the part before the transformer (the high voltage), safety settings =)

And good work!
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Dr. Dark Current
Thu Apr 02 2009, 03:47PM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Just one thing the gate resistors should be 22 ohms. Otherwise it looks OK to me

Edit: You should remove the "ground plane" on the HV section as any parasitic capacitances there are undesirable.

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teslacoolguy
Thu Apr 02 2009, 05:01PM
teslacoolguy Registered Member #1107 Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
If you can, make the traces slightly larger in the hv section.
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indiana
Thu Apr 02 2009, 07:30PM
indiana Registered Member #2009 Joined: Tue Mar 03 2009, 07:07PM
Location:
Posts: 43
made some improvements, got rid of the ground plane, and made the traces larger.

looks pretty sweet now!
1238700559 2009 FT66912 Plasma Speaker Better Output
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Arcstarter
Thu Apr 02 2009, 07:39PM
Arcstarter Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Just wanted to say you are really talented with making circuits :P. VERY nice job! I wish i could do it so well!

Also, what program do you use? Anyone have good luck with eagle? I made a few schematics on eagle, but never PCBs.

Keep up the good work!
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indiana
Fri Apr 03 2009, 07:04AM
indiana Registered Member #2009 Joined: Tue Mar 03 2009, 07:07PM
Location:
Posts: 43
wow, thanks a lot. this is only the second board i've designed. i've had a lot of help. smile

speaking of that, thanks again for the advice, everyone! the board was designed in eagle. it does take quite the learning curve, but once you've got it it's really fast and effective. it's the only program i've used.... so take it with a grain of salt. smile might be the worst one out there. lol
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