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video Plasma speaker demos
Plasma speaker using a flyback transformer. It uses an SG3525 chip to switch two MOSFET's in a half-bridge fashion.
You can make one using a simple 555 timer circuit here http://www.instructables.com/id/Audio-modulated-flyback-transformer-driver/
You can make one using a simple 555 timer circuit here http://www.instructables.com/id/Audio-modulated-flyback-transformer-driver/
But any flyback will work fine for this.
Plasma speaker from Alex on Vimeo.
Much bigger arc.