This is the result of my latest experimentation, a high-quality low distortion transformer plasma arc speaker ("singing arc"). A PWM audio modulation circuit (TL494) runs at 40kHz, drives two mosfets in phase in a "half-controlled fullbridge" fashion (two switch single pulse forward-flyback converter). A RC damping network on the primary gets rid of unwanted oscillations during the free-wheeling phase. As always, the camera distorts the sound a bit and cuts treble, it sounds cleaner in real life.
Showing posts with label Recensione. Show all posts
Showing posts with label Recensione. Show all posts
Wednesday, 23 January 2013
Plasma speaker "Hi-Fi"
Plasma speaker "Hi-Fi" Video Clips. Duration : 1.83 Mins.
This is the result of my latest experimentation, a high-quality low distortion transformer plasma arc speaker ("singing arc"). A PWM audio modulation circuit (TL494) runs at 40kHz, drives two mosfets in phase in a "half-controlled fullbridge" fashion (two switch single pulse forward-flyback converter). A RC damping network on the primary gets rid of unwanted oscillations during the free-wheeling phase. As always, the camera distorts the sound a bit and cuts treble, it sounds cleaner in real life.
This is the result of my latest experimentation, a high-quality low distortion transformer plasma arc speaker ("singing arc"). A PWM audio modulation circuit (TL494) runs at 40kHz, drives two mosfets in phase in a "half-controlled fullbridge" fashion (two switch single pulse forward-flyback converter). A RC damping network on the primary gets rid of unwanted oscillations during the free-wheeling phase. As always, the camera distorts the sound a bit and cuts treble, it sounds cleaner in real life.
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