Boards in 32 GitHub repositories, designed in KiCad, that use the 74LS240DC by Texas Instruments (-55℃~+125℃ 1 15mA 18ns@5V,45pF 24mA 29mA 4.75V~5.25V 74LS Output enable Schmitt trigger Tri-State - Buffers, Drivers, Receivers, Transceivers). See how each wires it, with its parts, size, README and files; the 74LS240DC’s symbol, footprint and pinout are on its own page.
tebl/RC1802-Cosmac-ELF
With the RC6502-project for making an Apple 1 replica done I wanted to do something different, so I started designing a simple version of the RCA 1802-based Cosmac ELF instead.
fabiodl/sf7000
Most of the work was done by Andrea Ottaviani https://github.com/aotta
Domesday86/Acorn-AIV-SCSI-Adapter-Card
A reproduction of the original Acorn AIV SCSI Adapter Card in KiCAD (as used in the BBC Domesday System)
Ccecil/MultiMotorSingleAxisSplitter
Breakout board for the Smoothieboard V2 that converts allows the independent switching of motors from a single axis.
electrickery/MicroKit09MK2
A recreation of an MC6809 Single Board Computer from the 1980's
roberto314/GIMIX_reproduction
Reproducing SS-50 and SS-30 cards and GIMIX Ghost Case and Mainboard
danwerner21/duodyne_frontpanel_alt
Alternate Duodyne Compatible Front Panel
sladek/SBC_8080_ECB
This is my attempt to build a single-board microcomputer based on the Intel 8080 CPU. It contains the following features:
osiweb/unified_retro_keyboard
Project to provide keyboard replacements for various classic computers, as well as classic ASCII keyboard
schlae/HardDriveInfo
Repair info and schematics for mostly older MFM hard drives
lynchaj/duodyne
Duodyne is a hobbyist retrocomputer system designed to run ROMWBW. It is comprised of modules on a system bus