Scientists tweak wireless power transfer, Tesla nods happily in his grave
![](https://s.yimg.com/ny/api/res/1.2/1ct1INMoxuHTELLKPVKl9Q--/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTU5NQ--/https://s.yimg.com/uu/api/res/1.2/iahce3EzzE3g9qAHJbqWmQ--~B/aD0zNzI7dz02MDA7YXBwaWQ9eXRhY2h5b24-/https://www.blogcdn.com/www.engadget.com/media/2012/05/wireless-power-transmission-05-16-12-01.jpg)
Wireless charging may be all the rage these days, but actually beaming electricity -- as sketched above by the man Tesla himself -- still has some snags. North Carolina State U researchers have found a way to possibly vanquish the biggest problem: the difficulty of exactly matching resonant frequencies to amplify current. If external factors like temperature change the tuning of a transmitter even slightly then power drops will occur, but circuitry developed by the NC State scientists would allow receivers to detect these changes and automatically re-tune themselves to match. This could make for more potent car and device charging in the future and, if they stretch the distances a bit, maybe we'll finally get the wire-free utopia Nikola dreamed up 120 years ago.