4 layers39 × 82 mm

Dks1837 shield
olsch01/DoorKing1837-ColorDisplay
Software and Hardware solution to modernize the 8 line LCD Character display of a Doorking DKS 1837 Access Control System.
13 partsMIT
Boards in 2 GitHub repositories, designed in KiCad, that use the SN74LVC573AN by Texas Instruments (-40℃~+85℃ 1.5ns 1.65V~3.6V 10uA 24mA 24mA 2ns 6.9ns 74LVC 8 D Latch Tri-State PDIP-20 Latches ROHS). See how each wires it, with its parts, size, README and files; the SN74LVC573AN’s symbol, footprint and pinout are on its own page.

olsch01/DoorKing1837-ColorDisplay
Software and Hardware solution to modernize the 8 line LCD Character display of a Doorking DKS 1837 Access Control System.

MicroCoreLabs/Projects
Ted Fried's MicroCore Labs Projects - FPGA CPU cores and emulators for the 8088, 8086, 8051, 6502, 68000, Z80, Risc-V, and also Typewriter and EPROM Emulator projects.