oneTesla: the Kickstarter

Yes, its live at last. You can find it here.
Let the coiling begin!

SPUN TOROID

Turns out tuning your DRSSTC is a Good Thing.

Same pulse-widths as before, but the 8x2" (as opposed to 7x1.75") toroid, brings the coil into tune and gives much brighter sparks.
Some stills, captured from the above video:

Miscellaneous oneTesla fluff

Several people on the internet are attempting to replicate my work, so I guess I should make a consolidated blog post about oneTesla...

Firstly, random construction tips:

• Ground, ground, ground. It is absolutely essential that your secondary have a good ground; either a (good) mains ground, or a stake pounded several feet into the earth. Otherwise the driver (and other nearby electronics) will go berserk.
• Don't plug the thing into a GFI outlet.
• Don't get creative with the IGBT models; FGH60N60SMD's are currently $1.83 on Arrow, and are really the only transistors fast enough to comfortably drive a coil at 300KHz in musical duty.
• Keep your resonant frequency between 200 and 350KHz. Too low, and the tank capacitor will overvolt. Too high, and the inverter will suffer from excessive switching losses. Of course, you could always go lower and use an external tank cap.
• FOR THE LOVE OF TAYLOR SWIFT make sure the gate drive transformer is phased correctly; no amount of fuses will prevent your bridge from being destroyed if it shoots through with 50J in the bus capacitors.
• Use a variac if you have one.

Secondly, interrupters: there's a couple of Kramnik's MIDI interrupter boards floating around. If you would like to beta test it, drop me a message privately (preferably on 4HV, the project thread is here) and we'll work something out. The board file for the interrupter is [here]; contact me for the polyphonic code since it isn't quite ready for public consumption yet.

Next, there's a semi-comprehensive troubleshooting guide [here]; please use it and give me feedback!

Finally, oneTesla is going commercial! Expect a Kickstarter and a full kit available in a couple months at the latest; the kit will have everything you need to construct the coil and polyphonic interrupter, and hopefully will be cheap and beginner friendly. Coiling will be brought to the masses! Be afraid...

I'll end with a photo, courtesy of Gao Guangyuan ("loneoceans"):

Serious business...also, GGY you're so good at taking coil photos!

Tesla Tower

Same hardware as last time, just arranged differently.

So...much...Tesla

The beginning of something wonderful...

...because anything with this many Tesla coils in it can't be bad, can it?

Eight mostly-populated oneTesla drivers

oneTesla update: Kramnik is magical

...because oneTesla was never supposed to be able to do this:

2' of spark!

I believe that's something like a 2' ground strike off a 10" tall secondary.
All credit goes to Daniel Kramnik for figuring out to make the coil do that (something about less coupling, more current).
FGH60N60SMD's are also pretty magical - 300A and I've yet to see them die.
More pictures:

Long Exposure

Ground Strike

I <3 Ultrabright Green LED's

oneTesla update (again)

Thanks to Kramnik, oneTesla now does polyphony!
Video:

The relevant Eagle driver files are [here].
I've also rerouted the driver for sending out; the files are [here] in case anyone is interested, but its not really practical to send it out in low quantities.