The Phenomenal Levitating Ball is a kit designed to demonstrate that an ultrasonic standing wave is able to support small objects suspended in space. The kit was inspired by an article in MAKE magazi…Read More…
The Phenomenal Levitating Ball is a kit designed to demonstrate that an ultrasonic standing wave is able to support small objects suspended in space. The kit was inspired by an article in MAKE magazine by Ulrich Schmerold.
The kit is a 3D design in the style of a sideshow booth and is supplied as a single PCB with mouse bites connecting the parts. Two ultrasonic transducers point towards each other and are driven by ~20V square waves. This sets up a standing wave between them with a number of nodes.
Typical objects that can be suspended are fragments of paper or pieces of expanded polystyrene. Only very lightweight objects can be supported.
Features an experimental 'tractor beam' mode in which the phase angle between the excitation pulses is slowly swept up and down with the sweep rate increasing over time. This alters the position of the standing wave nodes. Any suspended object (if not too heavy) will be moved up and down a few millimetres.
Powered by a pair of 9V PP3 batteries (not included).
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Packages normally shipped within a couple of days.
Fiona | Dec. 13, 2019
Donald | Nov. 13, 2019
Tanya | Oct. 16, 2019
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