Adafruit ItsyBitsy 32u4 - 5V 16MHz - compatible with Arduino

At the Feather M0\'s heart is an ATSAMD21G18 ARM Cortex M0 processor, clocked at 48 MHz and at 3.3V logic, the same one used in the new Arduino Zero. This chip has a whopping 256K of FLASH (8x more than the Atmega328 or 32u4) and 32K of RAM (16x as much). Adafruit 2796

Tiny (18 x 44 mm) breadboard-friendly development board, easy to use, hacker friendly. ATmega328 brains32KB of flash (1/2 K is reserved for the bootloader), 2KB of RAM, clocked at 16MHz. Adafruit 2590

At the Feather M0\'s heart is an ATSAMD21G18 ARM Cortex M0 processor, clocked at 48 MHz and at 3.3V logic, the same one used in the new Arduino Zero. This chip has a whopping 256K of FLASH (8x more than the Atmega328 or 32u4) and 32K of RAM (16x as much)! This chip comes with built in USB so it has USB-to-Serial program & debug capability built in with no need for an FTDI-like chip. Adafruit 3179

The board is equipped with ATSAMD51 microcontroller with ARM Cortex-M4 core and SPI Flash memory, communication interfaces and RGB diode. Adafruit 3382

Adafruit Trinket - Mini Microcontroller - 5V Logic

Adafruit 1222

FLORA is Adafruit\'s fully-featured wearable electronics platform. It\'s a round, sewable, Arduino-compatible microcontroller designed to empower amazing wearables projects. Adafruit 659

Adafruit 1500

Plate from the Adafruit Feather series equipped with an ATmega32u4 microcontroller and a small prototype surface (5x7). The chip contains 32KB flash memory, 2KB RAM memory and built-in USB support. The plate is compatible with Arduino. Adafruit 2771

GEMMA M0 is an intelligent clothing controller from Adafruit. In relation to the classic GEMMA board, it was equipped with a 32-bit ATSAMD21E18 microcontroller (based on Cortex M0 +). It has GPIO pins, RGB DotStar diode. The board can be powered by a 3.7 V Li-Ion battery (JST connector). Adafruit 3501

At the Feather 32u4\'s heart is ATmega32u4 clocked at 8 MHz and at 3.3V logic. This chip has 32K of flash and 2K of RAM, with built in USB so not only does it have a USB-to-Serial program & debug capability built in with no need for an FTDI-like chip, it can also act like a mouse, keyboard, USB MIDI device, etc. Adafruit 2795

Low-power, 2.4GHz spectrum wireless protocol that you can use with iOS without needing special certification. Supported by all modern smart phones - excellent for use in portable projects that will make use of an iOS or Android phone or tablet; it also is supported in Mac OS X and Windows 8+. Adafruit 2995

The board is equipped with ATSAMD21 microcontroller with ARM Cortex-M0 core and SPI Flash memory, GPIO pins and RGB diode. Adafruit 3505

Based on the versatile ATmega328, the Metro Mini packs 32KB Flash, 2KB RAM, a clock speed 16Mhz and the Optiboot bootloader. The slick black and gold unit includes 20 GPIO pins. Adafruit 2488 

Development board with AVR ATmega328 microcontroller with a clock signal of 16 MHz. Compatible with Arduino, it is equipped with a STEMMA QT connector. Adafruit 5597

Small development kit with ATmega32u4 microcontroller. The board has 6 power, 6 analog and 17 digital pins, which makes it have similar capabilities to the Arduino UNO. Compatible with Arduino. Adafruit 3675