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The spectacular and highly visible effect produced by tesla coils has been the subject of controversy for years. The high frequency high voltage energy produced possesses qualities unlike conventional electricity. It defies most insulation material, transmits energy without wires, produces heat, light and noise yet harmlessly passes through human tissue with virtually no feeling or shocking effects. Much research, money and effort was dedicated to actual construction of similar large devices capable of producing 200 foot lightning bolts and lightning 25 miles away. Nikola Tesla was the originator of this research and was first thought of as a charlatan. As more progress was made in the electrical sciences, it was soon realized that he was indeed correct, and responsible for many advances in the development of energy production. He has now been credited with of these advances and original techniques. His main theory, however, is still very much in question and many dedicated groups are hopeful in obtaining some break that will resurrect it. The tesla coil is the basis for this questionable research and never ceases to amaze all those who come in contact with its highly visual and audible effect.

Caution - Faraday cages are necessary when operating tesla coils near computers or other sensitive electrical equipment.