High Voltage Magic

Wizards with Lightnings


We are High Voltage Magic, an art-technical group, which offers an absolutely unique visual experience while bringing together science
and art in its purest form. We have been inspired by Nikola Tesla, an ingenious physicist, an inventor and a visionary scientist. In the
Czech Republic, it is only us who can master such a unique and original show. You don´t have to be worried about the performance; we pay attention not only to our safety but also to the safety of our spectators. 

"Lightning? It´s only an electrostatic friction, not the God´s messenger."


                             Prokop Diviš (1698 - 1756)

Tesla coil

How to tame lightning

A Tesla coil consists of two parts: a primary coil and secondary coil, each with its own capacitor. (Capacitors store electrical energy just like batteries.) The two coils and capacitors are connected by a spark gap - a gap of air between two electrodes that generates the spark of electricity. An outside source hooked up a transformer powers the whole system. Essentially, the Tesla coil is two open electric circuits connected to a spark gap. A Tesla coil
needs a high-voltage power source. A regular power source fed through a transformer can produce a current with the necessary power (at
least thousands of volts). In this case, a transformer can convert the low voltage of main power into the high voltage. The power source is hooked up to the primary coil. The primary coil's capacitor acts
like a sponge and soaks up the charge. The primary coil itself must be able to withstand the massive charge and huge surges of current,
so the coil is usually made out of copper, a good conductor of electricity. Eventually, the capacitor builds up so much charge that it breaks down the air resistance in the spark gap. Then, similar to
squeezing out a soaked sponge, the current flows out of the capacitor down the primary coil and creates a magnetic field. The massive
amount of energy makes the magnetic field collapse quickly, and generates an electric current in the secondary coil. The voltage zipping through the air between the two coils creates sparks in the
spark gap. The energy sloshes back and forth between the two coils several hundred times per second, and builds up in the secondary coil
and capacitor. Eventually, the charge in the secondary capacitor gets so high that it breaks free in a spectacular burst of electric current. The resulting high-frequency voltage can illuminate
fluorescent bulbs several feet away with no electrical wire connection. The principle behind the Tesla coil is to achieve a phenomenon called resonance. This happens when the primary coil
shoots the current into the secondary coil at just the right time to maximize the energy transferred into the secondary coil. While the Tesla coil does not have much practical application anymore,Tesla´s invention completely volutionized the way electricity was understood and used. Radios and televisions still use variations of the Tesla coil today.