SMRTR TechNov 3, 2025TechEBlog

Bouncing LEDs into the Third Dimension Using a Homemade Mini Volumetric Display

SMRTR summary

Matthew Lim created a pocket-sized volumetric display using an ESP32 board with an 8×8 LED matrix that bounces back and forth on a motor-driven track 16 times per second. Using persistence of vision, the rapidly moving LEDs create 3D animations like floating cubes, spheres, and fluid simulations that appear to hover in mid-air within a matchbox-sized device.

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