Below are some images of my first POV project. It uses a Teensy 3.2 processor and 36 DotStar LEDs (APA102).
Also, here's a video of it in operation. Video results aren't the best because of interaction between the frame rate and the LED update rate. But, you'll get the idea. https://youtu.be/CiRSouhlJos
More pictures, schematic, PWB files, and complete code are at my GitHub: https://github.com/gfvalvo/TeensyPOV