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Forums
4hv.org :: Forums :: High Voltage
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Plasma speaker circuits

 1 2 3 
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aknaydenov
Sun Feb 08 2009, 05:00PM
aknaydenov Registered Member #1963 Joined: Sat Feb 07 2009, 03:33PM
Location:
Posts: 3
 		I made it FM modulated and I get a cleaner, high frequency sound.
Today, I tried to test another circuit, which has two mosfets (I just transformed the Circuit 2 in this Circuit, without doing changes to the IC part and adding that fan controller. However, it doesn't work, the arc powers up when one mosfet is powered and the other disconnected, but it doesn't when both are powered. Any suggestions ?
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MRacerxdl
Sun Feb 08 2009, 07:19PM
MRacerxdl Registered Member #989 Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
 		Probally a mistake at TL494 wiring, because its need to be 90º Phased as other output. I havent used much the TL494, but see if the wiring is correct.
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Fraggle
Sun Feb 08 2009, 08:01PM
Fraggle Registered Member #1526 Joined: Mon Jun 09 2008, 12:56AM
Location: UK
Posts: 216
 		1.30E for an IRF540 isn`t that dear really.
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indiana
Tue Mar 03 2009, 08:26PM
indiana Registered Member #2009 Joined: Tue Mar 03 2009, 07:07PM
Location:
Posts: 43
 		hey franky,

you mention you had 5cm sparks and decent fidelity?

were you using circuit 1 to get those results?

could a person use these circuits to drive a TC to the same effect if there was a feedback coil involved?

last, how could a person build a beefier coil that would operate in a similar fashion, but use slightly higher power?

i'd like to get about 100db out of it. know of any commercially available flyback transformers that could make that happen?
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Franky
Thu Mar 05 2009, 10:02AM
Franky Registered Member #1940 Joined: Tue Jan 27 2009, 02:34PM
Location: Netherlands
Posts: 34
indiana wrote ...

hey franky,

you mention you had 5cm sparks and decent fidelity?

were you using circuit 1 to get those results?

No, those results came from the following circuit
Link2
The sound was not good enough, and to weak to use (if you lower the frequency it starts to make a lot of noice, but no music).
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tobias
Thu Mar 05 2009, 01:47PM
tobias Registered Member #1956 Joined: Wed Feb 04 2009, 01:22PM
Location: Jersey City
Posts: 172
 		Franky..
I think your link is broken.. at least I could not open it.
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Franky
Thu Mar 05 2009, 07:30PM
Franky Registered Member #1940 Joined: Tue Jan 27 2009, 02:34PM
Location: Netherlands
Posts: 34
tobias wrote ...

Franky..
I think your link is broken.. at least I could not open it.

Strange. I can open it. It works fine. Are there more people who can't open the link?
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semiconductor
Fri Mar 06 2009, 04:24AM
semiconductor Registered Member #1989 Joined: Fri Feb 20 2009, 05:28AM
Location: Edmonton Alberta, Canada
Posts: 17
 		your link works fine, I have been following this thread. I want to make an audio modulated flyback some time.
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indiana
Fri Mar 06 2009, 05:08AM
indiana Registered Member #2009 Joined: Tue Mar 03 2009, 07:07PM
Location:
Posts: 43
 		franky,

thanks for getting back.

right then. looks like fm is gonna be the way to go...

still trying to find a flyback.... who'd a thought that'd be the hard part?

:)

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semiconductor
Fri Mar 06 2009, 11:39PM
semiconductor Registered Member #1989 Joined: Fri Feb 20 2009, 05:28AM
Location: Edmonton Alberta, Canada
Posts: 17
 		Try your local electronics recycling depot or thrift store. You might have to pay $5 bucks for a monitor at a thrift store but the electronics depot will usually just let you take one or two for FREE :) Thats where I get most of my parts.
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