Adafruit has created an ARM Cortex-M0 version of its Gemma wearable development board and single-board computer – the original has an 8bit ATtiny85. Called Gemma M0 it is 28mm in diameter and 7mm high, with crocodile clip sewing pads for solderless wearable applications and a Microchip (Atmel) ATSAMD21E18 on-board. This vastly more powerful chip offers ...

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