Science Daily  July 27, 2021 A transmitter traditionally must first detect a device presence and position to be able to send energy in its direction. Researchers in Finland have designed a proof-of-concept device which creates power transfer channels in all directions, automatically tuning channels when receiving devices are in motion. Because of self-tuning, the device does not need complex electronics to connect with receivers embedded in devices and it can be moved freely within a wide charging range. By winding the coils in a specific way, they created two kinds of electromagnetic fields: one going outwards and the other around. […]