All code used in this project can found on GitHub @
The items below are directly sold via AdaFruit's website.
// Not including whatever tools and prototyping wiring/resistors/etc I may have used e.g. YMMV.
This project's idea came out of the need to communicate my state-of-mind with my girlfriend in some rapid and repeatable manor that doesn't become an annoyance. I could tell her "I'm ok, lets go do something together" or I'm in a bad mood, I need you to keep away", but multiply that by several times a week, each month, each year and so on. We'd experimented with using a fox and rabbit and at times it worked, others it didn't. Something more repeatable was needed.
Shout out to Adafruit's design: