A beautiful LED Pendant that incorporates a pushbutton as a simple mode selector.
This was inspired by Becky Stern and Lady Ada's Adafruit Gemma Hoop Earrings and the wonderful folks with the FastLED library.
I've made or assisted with putting about 15 of these pendants together and this project was the focus of the May 2017 class "Get Crafty (with Electronics!)" I taught at Collaborative Research Association of Social Hacktivity (Crash Space).
Since then, my personal piece has gone through a few iterations and now sports four additional rings.
Check out my Resplendr Pendant instructable.