on-this-day · july 9
nikola tesla, circa 1890. source: wikimedia commons
On this day in 1856 — Nikola Tesla was born. Alternating current, wireless power, electric motors. He designed the modern grid.
2 min read
Nikola Tesla was born at the stroke of midnight between July 9 and 10, 1856, in Smiljan, a village in what is now Croatia. During a lightning storm, according to legend. His father was a priest who wanted him in the clergy. Tesla had other plans. He claimed he could visualize machines in complete detail in his mind, rotating and testing them before ever building a prototype. He saw electricity not as a force to be controlled but as a medium to be shaped.
His great contribution was alternating current. Edison's direct current lost energy rapidly over long transmission lines. Tesla's AC system could be easily transformed to higher or lower voltages, making long-distance transmission practical. His AC motor was elegant -- no brushes, no commutator, no parts that wore out. George Westinghouse bought the patents. The War of the Currents was bitter and public. AC won because the physics were undeniable.
mark twain in nikola tesla's laboratory, new york, 1894. source: wikimedia commons
But Tesla was never content with the practical. He wanted to transmit power wirelessly. He built a massive experimental station in Colorado Springs, generating artificial lightning and transmitting energy through the ground. Investors backed away when they realized wireless power could not be metered. Tesla died in 1943, alone in a New York hotel room, feeding pigeons.
Tesla held over 300 patents. The unit of magnetic flux density bears his name. Electric cars bear his name. Wireless charging, radio transmission, and fluorescent lighting all trace back to principles he explored. He did not just invent devices. He designed the infrastructure that connects them.