Key Features: ATSAMD21G18 ARM Cortex M0 processor - the same one used in the Arduino Zero 256K of FLASH (8x more than the Atmega328 or 32u4) and 32K of RAM (16x as much) Built in USB so it has USB-to-Serial program & debug capability built in with no need for an FTDI-like chip 3.7V Lithium polymer battery connector and built in battery charging Feather is the new development board from Adafruit, and like its namesake it is thin, light, and lets you fly! We designed Feather to be a new standard for portable microcontroller cores. This is the Feather M0 Basic Proto, it has a bunch of prototyping space built right in.To make it easy to use for portable projects, 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 rechargeItem SpecificsFully assembled and testedNo EEPROM32.768 KHz crystal for clock generation & RTC3.3V regulator with 500mA peak current outputUSB native support, comes with USB bootloader and serial port debuggingYou also get tons of pins - 20 GPIO pinsHardware Serial, hardware I2C, hardware SPI supportPWM outputs on all pins6 x 12-bit analog inputs1 x 10-bit analog ouput (DAC)Built in 100mA lipoly charger with charging status indicator LEDPin #13 red LED for general purpose blinkingPower/enable pin4 mounting holesReset buttonSize: 2.0" x 0.9" x 0.28"Weight: Feather light 4.6gLipoly battery and USB cable not included
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