Invented by Nikola Tesla, the genius scientist and some say, the first ever geek, the Tesla coil is used to produce high-voltage, low-current, high frequency alternating-current electricity. This spectacular instrument shoots out lighting arcs of up to one metre in length and 400,000 volts. If the frequency is carefully modulated, musical tones can be produced

Sometimes called the 'Zeusaphone', the Tesla coil produces and ear-piercing sound as well as a spectacular lightening show

Tesla Coil