Datasheet

To make it easy to use for portable projects, we added a connector for any of our 3.7V Lithium polymer batteries

and built in battery charging. You don't need a battery, it will run just fine straight from the micro USB connector.

But, if you do have a battery, you can take it on the go, then plug in the USB to recharge. The Feather will

automatically switch over to USB power when its available. We also tied the battery thru a divider to an analog pin,

so you can measure and monitor the battery voltage to detect when you need a recharge.

Here's some handy specs! Like all Feather M0's you get:

Measures 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm) without headers soldered in

Light as a (large?) feather - 5.3 grams

ATSAMD21G18 @ 48MHz with 3.3V logic/power

256KB of FLASH + 32KB of RAM

3.3V regulator with 500mA peak current output

USB native support, comes with USB bootloader and serial port debugging

You also get tons of pins - 20 GPIO pins

Hardware Serial, hardware I2C, hardware SPI support

8 x PWM pins

10 x analog inputs

Built in 100mA lipoly charger with charging status indicator LED

Pin #13 red LED for general purpose blinking

Power/enable pin

4 mounting holes

Reset button

The Feather M0 Adalogger uses the extra space left over to add MicroSD + a green LED:

Pin #8 green LED for your blinking pleasure

MicroSD card holder for adding as much storage as you could possibly want, for reading or writing.