Hello everyone,
A little bit back (been waiting for the new rules since then) I built a plasma speaker (with a lot of help from the people over at all about circuits) and did a science fair project on it, in which I varied the ultrasonic base frequency and measured the maximum distance at which it would arc, I wanted to do further testing involving the duty cycle and create a carpet plot but ran out if time.

Heres a youtube video of it in operation
http://www.youtube.com/watch?v=vCI5RozQdTY
(subscribers would be nice, just sayin)

It wouldn't let me attach the word doc and excel doc, so I went ahead and attached the project writeup, the three blank pages being where the excel data goes.

Thoughts?

 

Love the water cooled transistor!!

 

How did it rate in the Science Fair?

 

We didn't actually enter them in a science fair, my teacher just had us do science fair projects for the third quarter project.
for what it's worth, the project got a perfect score, except for the half a point off for not citing procedure, which he corrected when I explained to him that this had never been done before.

@debe, if it didn't have an icecube directly on it, it would blow... really fast
guess thats what happens when you're running extreme signals through it.