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A DIY kit for a solid-state Tesla coil that plays music, shoots 2-foot-long sparks, and teaches you electronics.
A DIY kit for a solid-state Tesla coil that plays music, shoots 2-foot-long sparks, and teaches you electronics.
A DIY kit for a solid-state Tesla coil that plays music, shoots 2-foot-long sparks, and teaches you electronics.
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928 backers pledged $169,155 to help bring this project to life.

A toroid appears!

We're happy to say that after six long months of waiting, the first sample of our stamped toroid has finally arrived!

Looks good, doesn't it? This first sample is cut a little rough at the rim and has a few tiny wrinkles at edges, but our manufacturer assures us that he's painstakingly making adjustments to the die to get it just right. As for an estimate of when the finished product will arrive, it seems to be perpetually "a few weeks away." This is quite frustrating for both us and our manufacturer, but it turns out that stamping a toroid is more difficult than we all expected. While he's a fantastic machinist, fabricating a shape with tight curves like our toroid seems to require specific experience in stamping. If we could start over we'd look for a facility that specialized in metal spinning. Lesson learned. 

So far we've shipped approximately the first 150 kits, and then we ran into a hiccup with the chassis manufacturer. We initially awarded the job to a manufacturer who sent us several samples of his own accord, had valuable design suggestions and always replied immediately to messages. We were happy to work with him initially, but in the past two months he has become unresponsive. Shipments of 25 chassis at a time came more and more infrequnetly, until, finally, he stopped responding to emails and phone calls altogether. We've already paid for everything, so it's not easy for us to just award the job to someone else now. However, in the interim we've found an excellent Chinese supplier that we're getting several hundred units from in 8 days to keep production going. 

In other news, quite a few people have put together their kits already! We've received invaluable advice and corrections from this first round of builders; for example, Bill's extensive post here, JimKirk's advice here, and Junktronix's advice here. We've consolidated the information in these posts into an errata post on the forums - please read it before you start building! We're printing the first manuals in sets of 100 at a time to fix errors and incorporate people's suggestions. We recommend that you download the latest manual before you start working on your kit.

Happy coiling!


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    1. Craig Dunn
      on July 18, 2013

      I received my tracking information about a week ago and it finally showed up on the USPS site a day or two ago....showing 4 days away now. Round 2 U.S. pledge tier.

    2. Missing avatar

      David on July 16, 2013

      Same here, wondering about delivery. An update would be appreciated.

    3. Missing avatar

      Andrew Miller on July 16, 2013

      I'm wondering about delivery myself. Is this going

    4. Missing avatar

      Marcus Eubanks on July 10, 2013

      Just wondering on estimated delivery. . . Last update from the oneTesal team was roughly three weeks ago.

    5. Jon Nebenfuhr on June 24, 2013

      Stamping aluminum is very hard and a lot of shops that have done it in the past will pass over doing a bid for aluminum jobs.

    6. Adam on June 22, 2013

      Best kit in over 25 years of hobby building! Many thanks to the attention to detail!

      Build complete and I've been playing with it for many hours now.

      To other backers: Heed the above advice!! Check the oneTesla forum and the latest manual for any/all updates before flipping that power switch!!

    7. Ira Burton on June 22, 2013

      First spark tonight, I did have to swap the driver positions, then it was a thing of beauty! I used an inner tube for a wheelbarrow with a 4" hub, wrapped it in a layer of 3M Foil Tape (3381). While it will look much better with a solid metal torroid, I can't complain a bit, thank you!