the.com/tesla coil

means A high-voltage resonant transformer circuit that generates high-frequency alternating current at extremely high voltages, producing dramatic electrical arcs.

from Named after Nikola Tesla, who invented the device in the 1890s while researching wireless power transmission and high-frequency electricity. Tesla saw it as a serious tool for sending electricity through the air without wires — his grander ambition was lighting the world without cables — but the device's crackling arcs and ability to light bulbs from a distance made it an irresistible showpiece. The name itself followed Tesla's own fame: it stuck to the coil the way 'Edison' stuck to the bulb, less a technical label than a tribute to the man who kept conjuring lightning in his lab for science, and for spectacle.