Adafruit QT Py - SAMD21

A tiny but capable development board built around the ATSAMD21E18 — the same chip as the Gemma M0 and Trinket M0. USB-C connector, built-in RGB NeoPixel, STEMMA QT port for plug-and-play I2C sensors, and a Xiao-compatible footprint. Supports Arduino IDE and CircuitPython out of the box.

Key Features

• Processor: ATSAMD21E18, 32-bit Cortex M0+ @ 48MHz
• Memory: 256KB Flash, 32KB RAM
• Connector: USB-C
• STEMMA QT port — chainable I2C, compatible with SparkFun Qwiic & Seeed Grove
• Built-in RGB NeoPixel
• 11 GPIO pins, 9 PWM outputs, true analog output (10-bit audio)
• 6 capacitive touch pins — no extra components needed
• Hardware I2C, UART, SPI, I2S
• 3.3V regulator, 600mA peak
• Optional SOIC SPI flash pads for datalogging
• Castellated pads for flat PCB soldering
• Arduino IDE & CircuitPython compatible
• USB HID — keyboard, mouse, MIDI, serial, disk drive

Related products

• Want WiFi on a QT Py? Try the Adafruit ESP32-S2 QT Py WiFi Dev Board.
• Need a sewable SAMD21 board? See the Adafruit Gemma M0.
• Building a touch wearable? Check out the Open Universal Input Sleeve (OUIS).