Raspberry Pi ‘Holographic’ Christmas Tree Spins Ridiculously Fast



We’ve seen Raspberry Pi hologram projects before but this is the first one we’ve seen that functions as a Christmas tree. This project, created by Sean Hodgins, uses a Raspberry Pi 4 and relies on the principle of persistence of vision. This principle uses an LED strip to “paint” light at a specific speed. Using the tree’s rotation, it displays custom 3D effects in mid-air that in this case resemble a festive holiday evergreen.

This tree is made from a metal, triangular frame. It’s mounted to a larger frame that has a motor capable of spinning the triangle into a cone at 10 Hz. The tree is capable of displaying both static and moving images. This makes it possible to display a simple tree or cartoon images and, in one demonstration, a flaming tree.



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