Adafruit Itsy Bitsy 32U4 | Maker Minute
The Adafruit Itsy Bitsy 32U4 is an Arduino-compatible board in a tiny form factor. The Itsy Bitsy measures just 1.4” x 0.7” and is based on the same ATmega32U4 as the Arduino Leonardo, with 2 kB of RAM and 28 KB of Flash.