This circuit is an Wireless Power Transmitter that using the ultrasonic wave to transmit the power. However its just an educational project, because it can not delivers high power.
You can order the PCB from PCBWay here:
https://www.pcbway.com/project/shareproject/Ultrasonic_Wireless_Power_Transmitter.html
Parts list:
IC TL494
Ultrasonic transducer (Receiver and transmitter)
LED
Diode 1N4148
Resistor 1K (2pcs)
Resistor 51k
Resistor 10K
Multiturn Potentiometer 10K
Circuit:
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| Ultrasonic Wireless Power Transmitter Circuit |
Video:
