Adafruit Feather M0 Basic Proto - ATSAMD21 Cortex M0 _RPI_ARC_BUTTON -- but when you need

-- but when you need to do that 40-50 times a day

Each order comes with:

but any will work)

For a full tutorial with wiring diagrams

There's a few extras as well

Adafruit Feather M0 Basic Proto - ATSAMD21 Cortex M0 _RPI_ARC_BUTTON -- but when you needAdafruit 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