MakerFaire K.C. sneak peak at ArcAttack’s new toy

I’ve been seeing videos of ArcAttack all over the web for several years now and hoped one day I’d be able to cross paths with them. When I heard they were going to be at MakerFaire K. C., I was determined to grab them and ask a few questions. As it turns out, they’re fans of Hackaday and were happy to talk. Not only that, but when I was asking what fun things they were building, their eyes lit up. “You’re going to love this” one of them said as he ran off behind the stage.  He returned with a device which was strapped to his body and spitting 5 foot long lightning bolts. He was right, I did love it!  They demonstrated this proton pack looking portable tesla coil for a while, shocking each other and random bits of metal, all the wile grinning like the fools we all are.

I know we’ve covered a portable tesla coil or two before, but seeing this thing in person,heading right for you,strapped to someone who might actually even be able to run faster than you, is pretty cool.

There is video (sorry, shaky) and a ton of pictures after the break. Enjoy.

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Singing Tesla coils

The video above is ArcAttack! playing the classic “Popcorn” through their signature Tesla coils. Solid state Tesla coils (SSTC) can generate sound using what [Ed Ward] calls pulse repetition frequency (PRF) modulation. The heat generated by the plasma flame causes rapid expansion of the surrounding air and a resulting soundwave. An SSTC can be operated at just about any frequency, so you just need to build a controller to handle it. The task is made more difficult because very few electronics are stable in such an intense EM field. [Ed] constructed a small Faraday cage for his microcontroller and used optical interconnects to deliver the signals to the Tesla coils.

[via Laughing Squid]