The circuit of the coil contains a capacitor and a small hole called a spark gap. The coolest thing about this project is its simplicity. Video of Tesla Coil 2 mk iii in action in early 2014, running ~4.2kVA at ~330bps making 1.8m sparks.. Latest Tesla Coil 2 mk iii Specifications (Jan 2014): . This is one of the simplest and easiest circuit design, with just a few simple parts, you'll be creating your own mini tesla coil. A Tesla coil is an electrical resonant transformer circuit designed by inventor Nikola Tesla in 1891. Fast & Free shipping on many items! Let's make it! Great deals on Tesla Coil. It can transfer wireless electrical power to the CFL in no time. The Tesla coil requires one more thing: a capacitor to store charge and fire it all in one huge spark. In this electronics project, we will make a simple Tesla coil circuit with a 2n2222 NPN transistor. Expand your options of fun home activities with the largest online selection at eBay.com. Type - Asynchronous Rotary Spark Gap Tesla Coil Power - 8600VAC 4-stack MOT transformer Primary - 50 feet of 1/4" Copper Tubing, 1/2" spacing Secondary - 0.5mm enameled copper wire, 55cm on 4" PVC secondary