Instructables user [lhm0] has built a rotating LED sphere for displaying images and videos using persistence of vision.
The device utilises an RP2040 microcontroller and wireless power to avoid using slip rings, with an optional ESP01 module to provide a web interface for control.
Rather than use individually addressable LEDs, the SMD chips are held on custom PCBs, with through-hole RGB LEDs mounted on a printed LED-bending jig to maintain a 90-degree angle.
The display has a resolution of 128 lines produced by interlacing from 64 LEDs, with [lhm0] creating a custom binary video/image format, .rs64, for encoding content at 128x256 resolution.
The firmware, KiCad files and converter are available on GitHub.
