I made a plasma speaker with an arduino and a flyback transformer today

[elpechos]

Here's a video of it in operation. I'm pretty happy with how it turned out

 

[Dr_Doggy]

nice! what circuit did you use for this?

 

[elpechos]

nice! what circuit did you use for this?

There actually wasn't all that much to the circuit

https://s3.amazonaws.com/siliconjunction/SingingArc.png

 

[ClydeCrashKop]

Is the output from the Arduino just music or is the music added to a high frequency?
Do you have a link to the sketch or a good starting point?
I have an SD board and a MP3 board with SD that I haven't used yet.

 

[elpechos]

Is the output from the Arduino just music or is the music added to a high frequency?
Do you have a link to the sketch or a good starting point?
I have an SD board and a MP3 board with SD that I haven't used yet.

https://s3.amazonaws.com/siliconjunction/SdPlayerSource.zip This is the sketch I used.
It plays raw 8bit data pulse-width modulated. I'm going to do a proper write-up on the plasma speaker some point soon.

 

[ClydeCrashKop]

I haven't had time to do it with Arduino yet but I did get it working with a 555 timer.

I watched many videos on this and used the circuit from this instructable.
https://www.instructables.com/id/build-a-singing-ark-plasma-speaker-ongoing-proj/
**broken link removed**
Use 10K pots for R1 & R2 so you can adjust it for best sound. Mine ended up with 4.7k ohm each. C2 is 10 uF. 10 turns on the flyback coil. I used a 47 ohm resistor between pin 3 & the gate on a IRF540 MOSFET. I also used a diode across source & drain in reverse polarity for snubbing. I did not use D3, D4 or C5.

It is good for the ecology, adding to the ozone layer.