DescriptionThe Adafruit Feather M0 Basic Proto is a compact Feather M0 development board built around the ATSAMD21G18 ARM Cortex M0 microcontroller, native USB support, and an integrated prototyping area. It combines the Feather form factor with 3.3V logic, a USB bootloader, LiPo charging, and plenty of GPIO for portable sensor, data logging, and maker projects.Compared with simple 8-bit boards, the Adafruit Feather M0 Basic Proto gives you more memory, a fast 48MHz clock, hardware I2C, SPI, Serial, PWM on every pin, and analog input support. The built-in proto area lets you attach a small sensor, switch, resistor network, or interface circuit directly on the board before moving to a larger custom design.For time-stamped projects, pair this board with the Adafruit DS3231 Precision RTC FeatherWing. For stacked FeatherWing experiments, the Adafruit FeatherWing Tripler is a useful companion that keeps related Feather hardware organized on the bench.Features ATSAMD21G18 ARM Cortex M0 microcontroller running at 48MHz with 3.3V logic. 256KB Flash and 32KB RAM for Arduino, CircuitPython, and embedded prototyping. Native USB with USB bootloader and serial debugging support. 20 GPIO pins, hardware Serial, hardware I2C, hardware SPI, and PWM on all pins. 6 x 12-bit analog inputs and 1 x 10-bit DAC output. Built-in 100mA LiPo charger, JST battery connector, and charging status LED. Small prototyping area for sensors, buttons, pullups, or quick wiring. Reset button, pin-13 red LED, power/enable pin, and 4 mounting holes. Specifications OpenELAB SKU Adafruit-2772 Official Product Name Adafruit Feather M0 Basic Proto - ATSAMD21 Cortex M0 Product Type Feather M0 microcontroller development board Microcontroller ATSAMD21G18 ARM Cortex M0, 48MHz Logic and Power 3.3V logic/power Memory 256KB Flash, 32KB RAM, no EEPROM USB Native USB with USB bootloader and serial debugging GPIO 20 GPIO pins Interfaces Hardware Serial, I2C, SPI PWM PWM output on all pins Analog 6 x 12-bit analog inputs, 1 x 10-bit DAC output Clock/RTC 32.768KHz crystal for clock generation and RTC Regulator 3.3V regulator with 500mA peak output Battery Charger Built-in 100mA LiPo charger with charging status LED Dimensions 51mm x 23mm x 8mm without headers soldered in Weight 4.6g Package Note LiPo battery and USB cable are not included Applications Portable sensor nodes and data loggers powered by USB or LiPo battery. CircuitPython and Arduino learning projects based on ARM Cortex M0. Small prototypes with sensors, buttons, and simple interface circuits mounted directly on the proto area. FeatherWing-based lab, maker-space, and classroom test setups. Compact USB-powered or battery-powered measurement and control projects. Product List 1 x Adafruit Feather M0 Basic Proto - ATSAMD21 Cortex M0 1 x set of headers for soldering and breadboard use LiPo battery and USB cable are not included Other ContentThe images below show the Adafruit Feather M0 Basic Proto in setup, connector, PCB, and scale-reference views. These detail images preserve the official aspect ratio and have only been converted to WebP for this store.This setup image shows the Adafruit Feather M0 Basic Proto powered by USB and connected to a LiPo battery, which is useful for portable prototyping.The angled board image highlights the compact Feather footprint and the built-in proto area for small sensors, buttons, or wiring.The top view shows the included headers and the through-hole layout used when the board is installed on a breadboard.This close-up shows the native USB connector used for programming, serial debugging, and USB power.The JST battery connector lets the Adafruit Feather M0 Basic Proto switch between USB and LiPo power for portable projects.The top-down PCB view makes it easier to confirm pin labels, analog pins, digital pins, and the prototyping grid before soldering.The back view with a scale reference helps verify the board size for compact enclosures and classroom kits.This connected project view shows a typical Feather M0 Basic Proto wiring arrangement during bench testing.Resources Adafruit Feather M0 Basic Proto downloads Adafruit Feather Learn Guide Adafruit GitHub Adafruit New Products video FAQIs the Adafruit Feather M0 Basic Proto a complete development board?Yes. It is a fully assembled and tested Feather M0 development board with USB bootloader, LiPo charging, and a built-in proto area.Are the LiPo battery and USB cable included?No. The official product notes say the LiPo battery and USB cable are not included.Can I use this board with Arduino or CircuitPython?Yes. The Feather M0 Basic Proto is suitable for Arduino and CircuitPython projects, with official setup resources available from Adafruit.What is the proto area for?The proto area is for small add-on circuits such as sensors, buttons, pullups, indicators, or quick wiring without a separate prototyping board.What voltage does the board use?The board uses 3.3V logic and includes a 3.3V regulator with 500mA peak output.
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