NeoPixel Rainbow Ring Pendant

Holder design to use a 16 pixel NeoPixel Ring from Adafruit as a pendant.

**Electronics**
- NeoPixel Ring 16 (https://www.adafruit.com/product/1463)
- Arduino Pro Mini 3.3V (https://www.sparkfun.com/products/11114)
- Battery CR2032 (with https://www.thingiverse.com/thing:79502)
- micro switch (8mm/3mm/3mm)
- some wire

**Source code**

https://github.com/achorein/rainbowring-arduino

Have fun !