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2 layers51 × 23.2 mmFeather sdio, the printed circuit board in 3D

A simple SDIO breakout FeatherWing adapter board (KiCad)

Size
51 × 23.2 mm
Copper layers
2
Thickness
1.6 mm
Parts
7
Nets
27
Pads
41
Tracks, vias
35, 0
Pours
1
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
3 Jul 2026
Updated
3 Jul 2026

Overview

Feather sdio is an open-source printed circuit board by mikeysklar, from the mikeysklar/feather-sdio repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 51 × 23.2 mm with 7 parts on 27 nets, routed with 35 tracks and 0 vias.

It belongs with the interfaces and adapters and microcontroller boards boards of this library.

README

README.md

feather-sdio

A simple SDIO breakout FeatherWing adapter board.

This is a small adapter board that breaks out the SDIO bus on an Adafruit Feather so you can test SDIO peripherals (SD cards, SDIO Wi-Fi modules, etc.) without pulling out a breadboard every time.

Why

Prototyping SDIO on a Feather usually means wiring up the same handful of signals on a breadboard over and over. This board makes that a plug-in FeatherWing so testing SDIO is quick and repeatable.

Design files

Designed in KiCad. The project lives in the feather-sdio/ directory:

  • feather-sdio.kicad_pro — project file
  • feather-sdio.kicad_sch — schematic
  • feather-sdio.kicad_pcb — PCB layout
  • feather-sdio.step — 3D model export

Photos

Coming soon.

License

Licensed under the GNU General Public License v3.0.

Parts

7
QtyValueFootprintReferences
4, , ,
1Conn_01x09_SocketConnector_PinSocket_2.54mm:PinSocket_1x09_P2.54mm_Vertical_SMD_Pin1LeftH3
1HEADER-1X12Connector_PinHeader_2.54mm:PinHeader_1x12_P2.54mm_VerticalH2
1HEADER-1X16ROUNDConnector_PinHeader_2.54mm:PinHeader_1x16_P2.54mm_VerticalH1

Questions

How big is the Feather sdio PCB?

It measures 51 × 23.2 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Feather sdio use?

7 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Feather sdio KiCad files?

From the mikeysklar/feather-sdio repository on GitHub, at the commit this page was made from: the board is feather-sdio/feather-sdio.kicad_pcb and its schematic feather-sdio/feather-sdio.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Feather sdio design in my own project?

Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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