Micro SGTC(spark gap tesla coil) DIY Kits DIY kits：we offer insturctions,and you can follow our insturction to build yourself（please Prepare a DC12V power suply yourself） Some more words: we want to make a small Spark gap Tesla Coil(SGTC),it is better use DC power like 3-24V,all its functions should be the same as big SGTC,just the power will be smaller,so we can touch the spark and don’t have to worry about an electric shock.We are glad we’ve finished this idea in this project. it use dc12v,it is safe,and can make beautiful spark,you even can touch it with your fingers.of course you can fell the electric shock，but there is no pain,just a little Numb..... The air is full of ozone If you like it, then it's a good little project, it's simple to make, and the result is very amazing！ Small but full function.................. enjoy~~~~~~~~~~~~