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Ghost Writer using Ultrasonic Phased Array - Halloween Project

Special thanks to UPNALab (https://www.instructables.com/SonicSurface-Phased-array-for-Levitation-Mid-air-T/) for providing all the tools necessary to build this halloween project. The frame is temporary and I'm only using the top 256 transducers. Ultimately I plan to have two 256 arrays side by side to increase the "writeable" space for the "Spirit" :) More to come.
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