This circuit is a 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. Output current on the receiver side is too low (micro amps), so
you need high efficiency green LED.
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)
Green Transparent LED 5mm
Diode 1N4148
Resistor 1K (2pcs)
Resistor 51k
Resistor 10K
Multiturn Potentiometer 10K
Circuit:
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| Ultrasonic Wireless Power Transmitter Circuit |
Video:
