[Olimex] has created a small ultrasonic levitation kit that exemplifies ... All the design files, including the bill of materials, KiCAD schematics, and source code are provided under an open ...

A recent study by researchers from Spain, Finland, and Canada uncovered the way in which ultrasonic waves transport ...

Those go to a circuit board he designed which modulates the carrier with the audio signal using a single transistor and then sends the result out the ultrasonic transmitter. He took care to ...