[sdiy] Using a plasma ball as a control surface?

John P Shea info at extrinia.com
Mon Aug 27 02:46:46 CEST 2018

There are existing 3D gesture controllers (with MIDI) see Leap Motion et al.

Nowhere near as visually appealing tho!


On Mon, 27 Aug 2018 at 8:00 am, cheater00 cheater00 <cheater00 at gmail.com>

> Hi, I was wondering if anyone tried using a plasma ball as a controller
> for an electronic circuit. I just think it would be pretty cool. The
> question really becomes how you could figure out where the beas hit.
> Could you send mechanical waves through the dome? Maybe this would
> modulate the current, then based on phase difference (=delay) you could
> triangulate the beam location on the sphere. If you put two transducers at
> the very bottom of the sphere you might even only need to diangulate.
> Could one build an electrostatic grid that would tell where the beams go
> through? Could this be scanned in an x-y scheme, like eg a pc keyboard?
> Has anyone got any ideas?
> Thanks
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