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.
More pictures, schematic, PWB files, and complete code are at my GitHub:
https://github.com/gfvalvo/TeensyPOV/raw/master/Hardware/20180509_212934.jpg(image larger than 4 MB)