arduino › microcontroller board
adafruit Adafruit QT Py SAMD21
Cheapest QT Py and the easiest entry to CircuitPython. No wireless. Great for a USB HID macro pad or a STEMMA-QT sensor logger.
Specifications
- mcu chip
- atsamd21
- clock mhz
- 48
- flash kb
- 256
- sram kb
- 32
- wifi
- no
- wifi band
- none
- bluetooth
- none
- usb
- type_c
- gpio count
- 11
- analog inputs
- 9
- pwm pins
- 7
- i2c
- yes
- spi
- yes
- uart count
- 1
- operating voltage v
- 3.3
- input voltage range v
- 5
- power pins
- 3v3, 5v
- firmware compat
- arduino_ide, circuitpython, platformio
- ai accelerator
- none
- form factor
- qt_py
Sources
- Adafruit open product catalog · ingest 2026-05-06