Build a wireless power transmission system
For those who like to experiment with wireless power here is a circuit capable of delivering almost 50 watts with 88% efficiency from a supply voltage of 12 to 24 volts. A notebook power adapter of at least 70 W or more and an output voltage of 19.5 V or so is perfect. The basis for the circuit is a so-called Zero Voltage Switching (ZVS) converter. The transmitter and the receiver use identical circuits (and PCBs), making construction easy. The circuit is protected by a PTC resettable fuse and a simple adjustable electronic fuse using a high-side current monitor.