Binary clock using Feather 32u4, Featherwing RTC and NeoPixel FeatherWing
- Feather 32u4 Basic https://www.adafruit.com/products/2771
- Adalogger FeatherWing RTC https://www.adafruit.com/products/2922
- NeoPixel FeatherWing https://www.adafruit.com/products/2945