Femto is a tiny 12x12mm Raspberry Pi RP2040 module
Mirek Folejewski has designed the ridiculously tiny Femto module based on the Raspberry Pi RP2040 microcontroller with a size of just 12x12mm, and still including an SPI flash, a crystal, and a few passive components.
We’ve previously covered some really tiny RP2040 boards with the Pimoroni Tiny 2040 and Adafruit QT Py RP2040 boards, as well as the RP2040 Stamp module, but the 12x12mm Femto module is about a quarter of the size of 25x25mm RP2040 Stamp.
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The board is comprised of two parts: the module itself (aka mainboard) with the Raspberry Pi RP2040 microcontroller and the frame (aka solder frame) exposing the I/Os in a somewhat usable way.