Mirek Folejewski’s Femto Module Is a Full-Function Raspberry Pi RP2040 within the Smallest Footprint But



{Hardware} designer Mirek Folejewski has constructed what might properly be the smallest Raspberry Pi RP2040 module round, a tiny 12×12mm (0.47×0.47″) gadget dubbed the Femto module.

“Femto is a extremely compact RP2040 module,” Folejewski explains of the design, which boasts a footprint solely marginally bigger than the Raspberry Pi RP2040 microcontroller chip round which it’s constructed. “The undertaking consists of three components: Module (mainboard); body (solder body); tester (testbench, just for useful verification).”

Created on a four-layer PCB, the board design breaks out all 30 general-purpose enter/output (GPIO) pins of the dual-core RP2040 and nonetheless finds room for a USON8-packaged qSPI flash module, a 12MHz crystal oscillator, and a standing LED to point energy.

To make confirming profitable meeting of the compact module simpler, Folejewski’s Femto Tester serves as a provider board: With the Femto module linked at its heart, it brings all GPIO pins out to on-board standing LEDs and offers USB Sort-C connectivity for energy and knowledge plus devoted boot-select and reset buttons.

The Femto module is not the one small-footprint surface-mount module designed across the RP2040 microcontroller: Final yr Solder Occasion unveiled the RP2040 Stamp, which because the title implies is a stamp-sized RP2040 module. In comparison with the Femto Module, although, the RP2040 Stamp is a behemoth — albeit one which makes accessing the pins of the RP2040 simpler.

Folejewski has launched the design information for the boards in KiCad and Altium codecs on the undertaking’s GitHub repository, together with Gerber, meeting, pick-and-place, and bill-of-materials information for manufacturing. The maker has confirmed that they’re open supply {hardware}, however has not specified underneath which license the designs are made accessible.

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