6 layers313 × 259.5 mm

Open8-vga motherboard
adham404/Open8-VGA
An 8-bit computer from 74HC logic: microcoded CPU, VGA, PS/2, on-board editor and assembler. Play it in your browser.
322 parts3MIT
Boards in 2 GitHub repositories, designed in KiCad, that use the CD74HC138E by Texas Instruments (-55℃~+125℃ 13ns@5V,15pF 2V~6V 5.2mA 74HC 8uA Decoder Single Supply DIP-16 Signal Switches, Multiplexers, Decoders ROHS). See how each wires it, with its parts, size, README and files; the CD74HC138E’s symbol, footprint and pinout are on its own page.

adham404/Open8-VGA
An 8-bit computer from 74HC logic: microcoded CPU, VGA, PS/2, on-board editor and assembler. Play it in your browser.

EZam1992/555_Timer_Boards_PCBA
The 555 Timer Board is a beginner-friendly electronics project designed to introduce the author to the process of designing and manufacturing printed circuit boards (PCBs).