Adafruit ItsyBitsy 32u4 3V 8MHz

Dev Board
Adafruit ItsyBitsy 32u4 3V 8MHz

Ultra-compact 3.3V Arduino-compatible board with ATmega32u4 at 8MHz, native USB HID, 23 GPIO pins, 2KB RAM, 28KB flash, and Micro USB. Measures 35mm × 17mm — smaller than a Feather with equivalent AVR

Atmel ATmega32u4 AVR2 KB28 KB23 GPIO
~$10View

Adafruit ItsyBitsy 32u4 5V 16MHz

Dev Board
Adafruit ItsyBitsy 32u4 5V 16MHz

Ultra-compact 5V Arduino-compatible board with ATmega32u4 at 16MHz, native USB HID, 23 GPIO pins, 2KB RAM, 28KB flash, and Micro USB. Measures 35mm × 18mm — small form factor with full Arduino Leonard

Atmel ATmega32u4 AVR2 KB28 KB23 GPIO
~$10View

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