Share this project


Share this project

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.
Created by
928 backers pledged $169,155 to help bring this project to life.

Use this space to cheer the creator along, and talk to your fellow backers.

Have a question?

Only backers can post comments. Log In
    1. oneTesla 2-time creator on February 26, 2014

      Email us at You can also send a message though Kickstarter, but emails are easier for us to keep track of.

    2. Missing avatar

      Jon Russell on February 26, 2014

      Good and bad news then :-( I'll look out for updates on the toroids.
      Do you have an email address to send support requests to. I can send you some photos. The side in question, popped the two bottom sides of the holes it was going in to, out and broke the acrylic, when I press fitted it. The top inst going anywhere. The lugs are 3.2mm wide, the holes are 2.9mm wide (according to my calipers) they wont press fit, and if I "tap" them with a hammer, it will just crack the acrylic, like it did at the bottom... ? You can see one piece is thicker than the other pieces, if you put them all on a flat table. They haven't been cut from the same sheet... ? Thanks. Jon.

    3. oneTesla 2-time creator on February 26, 2014

      Yes, you will all be receiving spun toroids. You wouldn't believe.. after all the problems we had with the stamping shop, we now have a hangup with the spinning house. They started production but they claim their quote was for one-half of a toroid, while we made clear that we wanted the two halves of the toroid quoted together. The mistake is on their end and we're now trying to get them to honor the original price and not double charge us. The good news is that the tooling is finished and they have so far had a good turnaround time, so as soon as we work out this issue with them it shouldn't take too long to get back up to speed.

      As for the chassis, the latest ones have been able to press-fit together without glue. Are you certain you can't press them together, tapping lightly with a hammer? If not, send us a message and we'll see what we can do.

    4. Missing avatar

      Jon Russell on February 26, 2014

      Hi, I got my kit a couple of weeks ago and have completed the build. I have two questions; a) is there an ETA for my toroid ? I'm eager to test it now its built. b) there is a fault with my acrylic case, one of the sides is thicker than the other sides, so it doesn't fit. The bad sheet is 3.2mm thick, all the others are 2.9mm. How do I get a replacement case ? Thanks. Jon.

    5. Missing avatar

      Andrew Miller on February 26, 2014

      Good Day, I am a round four backer. I have my kit and it's great. Are we still going to receive a toroid? If so, when?

    6. oneTesla 2-time creator on February 13, 2014

      Hi Gavin! It isn't necessary to comment here as well - I'll respond to your Kickstarter message in a few minutes. Thanks!

    7. Gavin Maxwell on February 13, 2014

      Disappointed that USPS indicates my package was delivered, but if it was it wasn't to me... :((

    8. oneTesla 2-time creator on February 3, 2014

      see reply in Kickstarter message

    9. John Robin Dierauer on February 3, 2014

      Thank you, received my kit last week, looks great. My board is for 220VAC and shows diodes D4,5,6,7 but I only found 2 rectifier diodes MUR460. Is it possible you send me a complete schematic diagram for the 220VAC version 2.2 board by mail? Any missing part I am able purchase here.

    10. John Robin Dierauer on January 28, 2014

      Jan.27.2014 / I am looking forward to get my tracking number. Thank you for your great effort.

    11. oneTesla 2-time creator on January 21, 2014

      We are shipping the entire remainder out by this Friday. At long last! If you haven't received your kit yet then you will be notified of your tracking number by Thursday and the boxes will be out the door by Friday at the latest.

    12. Gavin Maxwell on January 21, 2014

      January 22 and still no word... am I the absolute last one on your list...?

    13. Missing avatar

      Andrew LeTourneau on January 20, 2014

      Well worth the wait! Thank you for producing an amazing product! (Note: Using a cake pan instead of a toroid due to backorder, but still awesome!)

    14. Missing avatar

      Barry Grall on January 11, 2014

      I received my kit today! I was one of the last in Round 4 of the 110V kits.
      A really long wait, but the packaging, design, everything looks top notch. I can't wait to get the top load.
      Thanks guys!

    15. Missing avatar

      tommy on January 9, 2014

      I'm in round 3 and have no shipping mail! Last 60 kits would mean round 3 is finished. What's wrong with my shipment??!

    16. oneTesla 2-time creator on January 9, 2014

      We're down to our last 60 kits! We're sending them out fairly consistently at about three per day. Thanks for your patience, everybody, we're trying our best.

    17. Gavin Maxwell on January 8, 2014

      Can someone explain to me what this project was again...? It's been so long I've forgotten...

    18. Missing avatar

      Andrew LeTourneau on January 2, 2014

      Just got an email that my oneTesla is being shipped ( I was in one of the last rounds of backers ) ! Good start to the new year, can't wait to get it and assemble it!

    19. Sparr Risher on December 23, 2013

      *wave* from a fellow Artisan's Asylum inmate. Good luck on the Christmas crunch if it's still ongoing. Can't wait to get my kit.

    20. Gavin Maxwell on December 15, 2013

      'twas the week before Xmas... :(

    21. oneTesla 2-time creator on December 9, 2013

      Some quick updates: we only got the chassis three days ago. Sadly there's pretty much nothing you can do when a manufacturer exceed his quoted lead time, especially if you’re in different countries. We also have not yet moved locations. Commercial real estate in the Boston area is a really cutthroat market, and we are fortunate to now have a lease, but not yet a set move-in date. We will show pictures of our new location in a forthcoming update.

      It seems unwise to give a fixed date for the remaining orders as we haven't been able to stick to estimates well, but we are working as hard as we can to get them out the door. We’re hopeful we can do a large portion by Christmas!

    22. Missing avatar

      Erik Cubbage on December 5, 2013

      I'm a Round 4 backer at $299 - any update on when complete kits will ship?

    23. Michael Knowles
      on December 3, 2013

      Any updates? Sounds like you should have gotten the parts from the manufacturer a couple weeks ago. Would love an update. Thanks.

    24. Ahaxz on November 17, 2013

      Still waiting on the round three one :(

    25. Nicholas Atkins on November 8, 2013

      I have a issue the instructions are missing a step I think I have to extra diodes and a place to put them on the board but it's not in the manual.

    26. oneTesla 2-time creator on November 8, 2013

      Today we reviewed the second iteration of the new chassis samples, and they look perfect. Pending any additional changes that the manufacturer wants us to review, they should arrive in about two weeks. After that, we should be able to roll out the remaining orders in around three weeks, as we have the remainder of the parts prepared in advance.

      We're also very excited to be moving to our new South Boston location this weekend. Lately we have been busy preparing for the move, from looking for shelving and furniture to better organizing our components and changing our address in dozens of places. We hope it will be a smooth transition!

    27. Missing avatar

      Andrew Miller on November 6, 2013

      Any date on when the round 4 kits will be shipped?

    28. Michael Knowles
      on October 31, 2013

      Like Justin, I'm wondering about the odds of a Christmas delivery? Any way to estimate on that? Thanks!

    29. oneTesla 2-time creator on October 29, 2013

      Hello Backers!
      Here is the latest news:

      We're currently changing manufacturers of chassis for the second time. Our last manufacturer quoted a long lead time when we needed another order, so we searched around and found a better price elsewhere. Unfortunately, this means that, yet again, some time is lost in the process of tooling and approving a sample.

      At the moment, we are doing a small amount of laser-cutting ourselves to keep things moving. The next bulk shipment of chassis should arrive about a week and a half from the date when we see a sample we can approve, which will be any day now.

      In the meantime, we are making the remainder of the small parts bags that we need, so that this does not become a holdup later. The small parts bags are by far the most time-consuming part of packaging the kit, so we will be able to get a large number of kits out the door very quickly as soon as the chassis arrive.

      We have also been searching for a more suitable space. While Artisan's Asylum in Somerville is a great resource, we direly need more space. In a few weeks, we're scheduled to move to a new South Boston location, which will fit our current needs. This is definitely beneficial in the long run, and hopefully the transition will be smooth.

    30. Justin Kimber on October 28, 2013

      Any update? Am I likely to see my round 4 kit in Australia before Christmas?

    31. Michael Asteriou on October 24, 2013

      Still waiting...and waiting...and waiting... :(

    32. Eden
      on October 12, 2013

      Round three backer and just got my kit. Can't wait to get started! Thank you.

    33. Missing avatar

      Alan Ford on October 4, 2013

      Round Two backer and my toroid has just arrived. It a gorgeous piece of manufacturing! OneTesla crew, don't let the grumpy folks get you down. We all knew (or should have known) that there are risks, delays, and bumpy rides associated with any startup. Thanks again for all your hard work!

    34. oneTesla 2-time creator on October 4, 2013

      I'm sorry about the wait; we're working as fast as we can, pushing aside classes and other responsibilities to come in and pack kits every day. There's no way for us to work around the continuing operating expenses that we have, so the small revenue stream is vital. Something has to keep the wheels turning.

      If you are a backer who wrote to us that you really wanted your kit right away due to some upcoming event, and you were not far in the queue, we have been fairly accommodating. Matthew & others, if you are in a hurry, then message us and maybe we could work something out; otherwise we are working through the queue as fast as we can.

      Realistically, Round 3 domestic will be finished in about two weeks, and Round 3 international the week after that. Right now we have 50 kits on deck waiting for just IGBTs and USB-MIDI adapters. Due to some difficulty in finding a suitable replacement supplier for USB-MIDI adapters and a long wait time for shipping from China, the kits we shipped in the last week have no USB-MIDI adapters, and we will have to make a second shipment later, as much as we wanted to avoid needing to do so.

      We knew we weren't signing up for anything easy, but last January it was difficult to anticipate the challenges to need to be a fulfillment company as well as students, designers, a customer support team, and functioning people who need to cook and clean and such :). That's why we capped the orders at 600 after only a week of our campaign, and we're all still relieved that we didn't take on more.

    35. Chip Crell on October 4, 2013

      Wow this has been one heck of a learning experience for a lot of people. You know what they say you learn from your mistakes... I thought I would have had my tesla coil a long time before I planned to use it as a teaching element for a lot of students... Now I just have to teach them something else.. Maybe poor business practices.. Like shipping orders to backers after buyers..

    36. Missing avatar

      Ryan Wenner on October 4, 2013

      Round three here. I agree with the consensus here, that it's unacceptable to be shipping "orders" before backers receive their kits. I'm completely understanding and sympathetic to missed deadlines in the product commercialization process It happens to virtually every kickstarter project, and I really don't mind. However, it's frustrating to know that us 'backers' who have been patiently waiting in line for 9 months now, are taking a back seat to people currently placing orders who receive their tesla coil in less than two weeks. If you've underestimated costs and ran short on capital... taking orders is a great way to bring in cash flow...but orders should wait in the same line that the rest of backers are currently in. That's the precedent set by many other crowd sourced products. When will I receive my kit/torroid?

    37. matthew phillips on October 1, 2013

      I backed at 299 and still don't have my shipment. How about I send you an additional 31$ and you send my tesla coil?
      It is highly unacceptable that web orders are being fulfilled before backers.

    38. Missing avatar

      Marc Gunter on October 1, 2013

      I am a round 3 backer. No sign of my kit. I was hoping to have it ready for Halloween. Should I be worried?

    39. Missing avatar

      Matt on September 30, 2013

      Any update on when the next batch is shipping

    40. Peter Easton on September 28, 2013

      @oneTesla - can you please post an update when you've sorted this out? I've already spent a lot of time on this trying to figure out what i did wrong, and still need to replace my IGBT's. I'm only planning on doing this when I know that I'll end up with a working coil. Thanks!

    41. oneTesla 2-time creator on September 28, 2013

      So I have some fresh meaningful information regarding the tuning issue:
      A small fraction of the secondaries (about 10 right now) seem to tune at a frequency centered around 320KHz (with maybe 10% spread to either side) rather than the 260KHz we wanted.
      I think these secondaries can be uncovered using a simple resistance measurement, but I need to collect some resistance data before definitively posting a range of acceptable resistances. Fortunately the driver runs fine at 320KHz, so all you need to do is swap the tank cap for a 47nF one (check the forums for further details).

    42. Bill on September 28, 2013

      5% off tuning is a bit off the mark, unless you mean 5% of all kits have had bad coils in them. As of current count there are 10 coils (including mine) off by at least 25% in Bayley's thread asking for tuning information. I've been asked (via KS message) to send my secondary back to you (oneTesla) but you haven't responded to my question asking if you wanted the toroid with it.

    43. oneTesla 2-time creator on September 28, 2013

      Yes, please do always use the latest manual to guide you. And yes, if the sparks don't grow, or something looks wrong, then don't turn up the power! As far as we can tell, the secondaries are not more than 5% off from our specifications, so we're still investigating what this tuning issue might be. There's further discussion on the forum ( if you're interested.

    44. Bill on September 28, 2013

      I want to echo Peter's comment. If you build your kit, and spark length doesn't grow at all with an increase in power, turn off your coil immediately. There's a handful of kits so far that have had secondaries way out of tune. Attempting to run your coil with these secondaries WILL blow out parts on you driver board. I lost both my IGBTs and a diode.

    45. Peter Easton on September 23, 2013

      Remember to build your Tesla Coils using the latest manual ( and use the forums for information ( - especially on startup and performance problems. It sounds like a few kits have shipped with sub-par secondary coils. Increasing the power doesn't increase spark length, it just blows components as I have found out from experience.

    46. Creation Hardware on September 20, 2013

      Have all of the round threes shipped? I am still waiting.

    47. Missing avatar

      Bob Walance on September 19, 2013


      I'm still missing my toroid. I'm a 'Round 2er'. Please help.

      Bob Walance

    48. Missing avatar

      David on September 19, 2013

      Hey Heidi, Thanks for the fast reply, it's appreciated.

      I'll try to make this comment as short and constructive as possible. First, it really takes a lot for me to get frustrated and actually share my frustration online. The reason is that for the past 5 years, I've setup from scratch an online store for a company with over 4000 items/parts. We were shipping about 50 packages a week and for the first 2 years, it was a one man show. On top of coding and upgrading the website, I was answering phone enquiries/orders, replying to multiple emails everyday, contacting distributors/manufacturers, getting back to customers with the correct information, packing/shipping the orders, follow ups for back orders, dealing with returns, unsatisfied customers, keeping track of the inventory, sending repairs, hiring my team etc. Let's say I've learned a great deal, especially that I'm not superman ;-) it was too much for one person. So I completely understand you.

      That being said, we'll have to agree to disagree. The "limited number of orders" you shipped to non backers does have an impact on the kickstarter reward lead time as much as it helps you to continue to make bulk purchases of components. It also have a very big impact on your customers satisfaction. In those crazy 5 years, the main rules for my team were to be transparent, honest and fair. For example if a customer asked about a product and we didn't know the answer, we didn't make one up; we called the distributor/manufacturer and got back to the customer with the correct information. For backorders, we didn't keep customers in the dark, we kept them updated. And like you did, when we made mistakes, we acknowledge them and tried to never make them twice. Furthermore, when a new product was announced, we always received multiple preorders, more than the actual amount of units we would receive in our first shipment, and we always shipped orders in the order they were received. No exception, not even to well known musicians or friends. By doing that, we had an awesome reputation and gained their trust. That is the reason why it was so successful and the customers kept coming back and even kept their back orders us when they could have purchased somewhere else.

      For the round 4 backers it does make a big difference that you are shipping orders within 10 days to non backers for practically the same price we paid months ago. Maybe I'm wrong, I'm not perfect ;-) But I know I can't wait to get your awesome Tesla Coil! Please keep us posted, for my part I'll be patient. Thanks again for replying right away and with honestly, it is very much appreciated, it helps with the frustration.

    49. oneTesla 2-time creator on September 19, 2013

      Heidi here-- there's a lack of communication between team members at this moment because I'm away at a conference for a few days, and we’ve split up roles to work more efficiently. The current general division of labor is that Bayley is handling forum support, and I'm overseeing shipping. So, I am much more up to date on the fulfillment situation.

      David, I apologize that you're upset—but please don’t be. In fact it is true that we are shipping website orders within ten days at this moment; it says so right on the site. However, let me emphasize two things. First, their cost is substantially higher, and the volume is vastly less. The fact that we take care of a limited number of orders from our website is making no impact on the Kickstarter reward lead time. If we closed the website nothing would change. Additionally, the small but nontrivial revenue helps us continue to make bulk purchases of components that we did not source in quantity 600 to begin with, mostly due to lack of immediately available inventory from suppliers.

      One of the most frustrating things is keeping track of our inventory. It’s the lead time for one missing part at a time that slows us down the most—at this particular moment it’s the fact that the case fans we were ordering approximately 100 at a time just prohibitively jumped up in price, and a substitute is taking a few weeks to ship. Since we are operating at a small margin and shipping two boxes to the first two rounds of backers instead of one box already drove up costs, we cannot ship incomplete kits again.

      Regarding the inaccurate ETAs, it’s true that we keep being more hopeful about what we can accomplish than what is showing itself to be possible. Just like you, we keep looking back and wondering with frustration, “what’s taking so long?” Well, it’s many factors: a large inventory of many parts that is difficult to keep track of, our tight space which doesn’t allow for the most efficient workflow, the fact we needed to process several hundred individual toroid shipments, the fact that every kit takes forty minutes or more in total to put together. Our fantastic summer helpers left at the beginning of September, requiring us to search for, hire, and train new assistants.

      Nevertheless, we are learning an incredible amount. I plan to summarize these lessons we’ve learned about logistics in a Kickstarter update, though right now I want to focus my efforts entirely on continuing to ship kits. While Bayley is balancing a full class load with oneTesla, I am working on it more or less full time.

      Please don’t hesitate to ask us more about what we’re up to—we appreciate the fact that all of our backers supported us, and we want to communicate openly to benefit everyone.

    50. Jacob Potter on September 19, 2013 right now says: "Estimated lead time is ten business days, as we are still working through some backlogged orders from our January Kickstarter campaign. However, we understand that for some projects time is of an essence, so we will expedite orders for a $50 fee."

      If new orders will take 10 days, does that mean that all the Kickstarter orders will be shipped by then? :)

Show older comments