4 layers84 × 51 mm

A500-sd plus controller
Mathesar/a500-sd-plus-controller
SD-card plus Ethernet controller for the Amiga 500
84 parts18
Boards in 2 GitHub repositories, designed in KiCad, that use the R-RJ45R08P-A004 by Ckmtw (0℃~+70℃ 1 12.6mm 15.1mm 15.9mm Gold Harpoon Contact (Plastic) Non-LED Non-PoE Phosphor Bronze RJ45 Jack Right Angle Unshielded Push-Pull Ethernet Connectors / Modular Connectors (RJ45 RJ11) ROHS). See how each wires it, with its parts, size, README and files; the R-RJ45R08P-A004’s symbol, footprint and pinout are on its own page.

Mathesar/a500-sd-plus-controller
SD-card plus Ethernet controller for the Amiga 500

giomf/Promatrix-4000-IO
8-output / 7-input digital IO board (RP2040-based) with USB serial control.