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 a 32bit processor, 32kbyte RAM and 256kbyte flash. Plus it has native USB support, “which removes the need to download additional software for use”, said Mouser, which is stocking the item.

The board ships with Adafruit’s CircuitPython programming language, so makers and engineers of all skill levels can use it out of the box without downloading software – it also supports the Arduino integrated development environment (IDE).

On board it an on/off switch, reset switch, JST battery connector, and a built-in Adafruit DotStar RGB LED.

Gemma M0 has three general-purpose digital input/output pads, each also offering 12bit analogue input and supporting capacitive touch. All three pads can drive NeoPixels or DotStars on any pins.

Pads are named in the same way as the original GEMMA development board, so existing Arduino code will continue to work without changes.