[Sean Hodgins] genuinely harnessed the getaway spirit to produce his really have Big Spinning Holographic Xmas Tree (of Demise). It is a 3-dimensional persistence-of-eyesight (POV) masterpiece, but as a collection of promptly spinning metallic features, it’s potentially quite risky as nicely. As [Sean] demonstrates, the system can exhibit other pictures and animations perfectly outside of the realm of mere holiday getaway trees.
Original experiments targeted on refining the mechanical composition, bearings, and motor. A 1/2 horsepower A.C. motor was picked and then the proportions of the tree were being “trimmed” to optimize a triangular body that could be rotated at the essential POV velocity by the beefy motor. A six-wire electrical slip ring makes it possible for power and regulate signaling to be coupled to the tree via its spinning central shaft.
The RGB elements are SK9888 LEDs also know as DotStar LEDs. DotStar LEDs are series-chainable, independently-addressable RGB LEDs very similar to NeoPixels. However, with close to 50 moments the pulse width modulation (PWM) rate, DotStars are more suitable for POV purposes than NeoPixels. The LED chain is driven by a Raspberry Pi 4 single board laptop or computer working with a clever program for storing picture frames.
If deadly rotational velocity is not your cup of tea, think about this slower spinning RGB Xmas tree showcasing a Do it yourself slip ring. Or for a lot more POV, may perhaps we counsel this minimalist persistence-of-vision exhibit demanding only a couple LEDs and an ATtiny CPU.
