Purple Rain is a wearable LED art piece I made for OmegaCon Spring 2016. Below is a 5 second sample of the art piece in operation.
In 2014, I modified an OmegaCon badge lanyard with an Adafruit Gemma microcontroller and a 12-pixel Adafruit Neopixel ring. Each OmegaCon, I make a thematic LED art piece with this modified lanyard, using the FastLED library.
For Spring 2016, the death of Prince was fresh news, and so I chose to make "Purple Rain", which included this Arduino sketch and white synthetic flower to act as a diffuser.
For Arduino sketches, the directory name must match the .ino name; either rename the .ino, or clone this repo using
git clone <repo_url> Purple_Rain
Change the DATA_PIN constant to address the Digital pin connected to the data line for your LED strip; change the LED_COUNT constant to reflect the number of pixels in your strip. If you're not using a Neopixel-compatible WS2812 LED strip, you may need to alter the addLeds line and make other changes.
This sketch has been tested with various WS2812-based LED strips connected to various Arduino-compatible boards; however, to get it to upload to the Gemma I needed to use the Adafruit Arduino IDE--FastLED will not compile for the Gemma only on the Arduino 1.6.5 IDE branch.
The most recent versions of the standard Arduino IDE worked just fine for every other board I tested.