
Passive rpi hub75-adapter
hzeller/rpi-rgb-led-matrix
Controlling up to three chains of 64x64, 32x32, 16x32 or similar RGB LED displays using Raspberry Pi GPIO

easy connect to your kindle serial debug port
Kindle adapter is an open-source printed circuit board by edoput, from the edoput/kindle-adapter repository on GitHub. It is a 2-layer board of 30.5 × 8.9 mm with 2 parts on 5 nets, routed with 11 tracks and 0 vias.
It belongs with the interfaces and adapters boards of this library.
A physical adapter going from a 1.8V serial USB converter to the kindle UART debugging pads
The kindle UART debugging pads are tiny and very close, by (not so) careful measurement I think they are spaced as a 0.1mm header, we'll see about that.
Also the on board circuitry runs at 1.8V so you need an serial USB adapter already running at 1.8V to keep the magic smoke inside.
This is not meant to be soldered on the board but to be kept in place using some clips and the connection between the board and pads relies on pogo pins.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | Conn_01x04 | Connector_PinHeader_1.00mm:PinHeader_1x04_P1.00mm_Vertical | J2 |

hzeller/rpi-rgb-led-matrix
Controlling up to three chains of 64x64, 32x32, 16x32 or similar RGB LED displays using Raspberry Pi GPIO


adamws/kicad-kbplacer
KiCad plugin for automatic keyboard's key placement and routing

Luos-io/luos_engine
Open-source and real-time orchestrator for cyber-physical-systems, to easily design, test and deploy embedded applications and digital twins.

NVNTLabs/switch2-SDEX2M2
Micro SD Express to M.2 NVME Adapter for Nintendo Switch 2

BlueSCSI/BlueSCSI-v2
BlueSCSI v2/Ultra - an open source, open hardware, SCSI emulator using the Pi Pico PR2040 and Pico 2 RP2350

ohmtech-rdi/eurorack-blocks
Software to Hardware Prototyping for Eurorack using C++, Max/Gen~ or Faust

It measures 30.5 × 8.9 mm and has 2 copper layers, 1.6 mm thick.
2 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.
From the edoput/kindle-adapter repository on GitHub, at the commit this page was made from: the board is kindle-adapter.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask edoput before reusing the design.