Adafruit GEMMA M0

Dev Board
Adafruit GEMMA M0

Coin-sized wearable microcontroller board with ATSAMD21E18 Cortex M0+ at 48MHz, 3 I/O sew pads, built-in RGB DotStar LED, and CircuitPython pre-installed. Designed for e-textiles and wearable projects

ATSAMD21E18 ARM Cortex M0+32 KB256 KB
~$10View

Adafruit Trinket M0

Dev Board
Adafruit Trinket M0

Ultra-compact ATSAMD21E18 ARM Cortex-M0+ board at 48 MHz with 256KB flash, 32KB RAM, 5 GPIO pins, built-in RGB DotStar LED, capacitive touch, native USB, and CircuitPython support. Weighs just 1.4g in

ATSAMD21E18 ARM Cortex-M0+ @ 48 MHz32KB SRAM256KB

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