2020-09-12 (Sa) Hackaday Summary

Eye-Catching And Crumb-Suspending
I understand magnetic levitation, which uses a sensor to detect an object, and an electromagnet to keep it from falling too low or rising too high. Acoustic levitation uses some dark magic. I had to learn the concept, so I could brief it, and it is less mysterious now. Someone designed a gorgeous PCB to make a small ultrasonic levitation rig that could sit on a desk, and it rivaled some beautiful convention badges.

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