Adafruit Feather M0 Basic Proto - ATSAMD21 Cortex M0 _RPI_ARC_BUTTON Mounted on PCB assembly with

Mounted on PCB assembly with 16-pin DIP footprint

you can be up and running in under an hour on just about anything with a USB port

Some light soldering is required to put the headers onto the shield

There's a few extras as well

This adapter is backwards compatible with v2

Adafruit Feather M0 Basic Proto - ATSAMD21 Cortex M0 _RPI_ARC_BUTTON Mounted on PCB assembly withAdafruit Feather M0 Basic Proto pairs a powerful 48 MHz ARM Cortex M0 with built in battery charging and onboard prototyping space, making it ideal for portable and breadboard free Arduino projects. Feather is Adafruits portable development board familythin, lightweight, and designed to go wherever your projects take you. Built to be a new standard for mobile microcontroller platforms, Feather combines power, flexibility, and battery support in a