The Feather M0 Basic Proto is the no-frills member of the Feather M0 family, built around the ATSAMD21G18 ARM Cortex M0 processor with a built-in prototyping area for soldering on extra components. With 256KB of flash and 32KB of RAM, it provides significantly more processing power than ATmega-based Feathers.

The ATSAMD21 — the same chip used in the Arduino Zero — includes native USB support, a 10-bit DAC output, and PWM on all pins. The 32.768 kHz crystal provides a precise clock source for RTC applications.

Key Features

• ATSAMD21G18 @ 48 MHz – ARM Cortex M0, 3.3V logic
• 256KB Flash + 32KB RAM – No EEPROM
• Native USB – Built-in USB bootloader and serial port debugging
• Built-in Prototyping Area – Solderable space for quick component additions
• 32.768 kHz Crystal – For clock generation and RTC
• 20 GPIO Pins – PWM on all pins
• 6× 12-bit Analogue Inputs – Higher resolution than ATmega-based Feathers
• 1× 10-bit DAC Output – True analogue output
• Hardware Serial, I2C & SPI – Full peripheral support
• Built-in LiPo Charger – 100 mA charging with status indicator LED
• Battery Monitoring – Battery voltage routed to an analogue pin via divider
• 3.3V Regulator – 500 mA peak current output
• Pin #13 Red LED – General-purpose blinking

Specifications

• Dimensions – 51 × 23 × 8 mm (without headers)
• Weight – 4.6 g
• Mounting – 4 mounting holes

Also Available

• Feather M0 Adalogger – With MicroSD card holder
• Feather M0 Bluefruit LE – With Bluetooth Low Energy
• Feather M0 Express – Designed for CircuitPython
• Feather M0 WiFi – With ATWINC1500 Wi-Fi
• Feather M0 RFM95 LoRa Radio (900 MHz)
• Feather M0 RFM69HCW Packet Radio (868/915 MHz)

Ideal For

• Quick prototyping with onboard solderable area
• Projects requiring true analogue output (DAC)
• Expanding with FeatherWing add-on boards
• Stepping up from ATmega-based boards

Package Contents

• 1× Assembled and tested Feather M0 Basic Proto
• 1× Header set