{"title":"Adafruit Feather M0 Basic Proto - ATSAMD21 Cortex M0","handle":"adafruit-feather-m0-basic-proto-atsamd21-cortex-m0","url":"/products/adafruit-feather-m0-basic-proto-atsamd21-cortex-m0","description":"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.\n\nThe 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.\n\nKey Features\n\n\nATSAMD21G18 @ 48 MHz – ARM Cortex M0, 3.3V logic\n\n256KB Flash + 32KB RAM – No EEPROM\n\nNative USB – Built-in USB bootloader and serial port debugging\n\nBuilt-in Prototyping Area – Solderable space for quick component additions\n\n32.768 kHz Crystal – For clock generation and RTC\n\n20 GPIO Pins – PWM on all pins\n\n6× 12-bit Analogue Inputs – Higher resolution than ATmega-based Feathers\n\n1× 10-bit DAC Output – True analogue output\n\nHardware Serial, I2C & SPI – Full peripheral support\n\nBuilt-in LiPo Charger – 100 mA charging with status indicator LED\n\nBattery Monitoring – Battery voltage routed to an analogue pin via divider\n\n3.3V Regulator – 500 mA peak current output\n\nPin #13 Red LED – General-purpose blinking\n\n\nSpecifications\n\n\nDimensions – 51 × 23 × 8 mm (without headers)\n\nWeight – 4.6 g\n\nMounting – 4 mounting holes\n\n\nAlso Available\n\n\nFeather M0 Adalogger – With MicroSD card holder\n\nFeather M0 Bluefruit LE – With Bluetooth Low Energy\n\nFeather M0 Express – Designed for CircuitPython\n\nFeather M0 WiFi – With ATWINC1500 Wi-Fi\nFeather M0 RFM95 LoRa Radio (900 MHz)\nFeather M0 RFM69HCW Packet Radio (868/915 MHz)\n\n\nIdeal For\n\nQuick prototyping with onboard solderable area\nProjects requiring true analogue output (DAC)\nExpanding with FeatherWing add-on boards\nStepping up from ATmega-based boards\n\n\nPackage Contents\n\n1× Assembled and tested Feather M0 Basic Proto\n1× Header set\n\n\n\nNote: LiPo battery and USB cable are sold separately.\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":10319,"title":"Default Title","sku":"AF-2772","price":40.89,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":101,"option1":"Default Title"}]}