20 open source boards using the 74LS123
Real designs built with the 74LS123, from public GitHub projects: a quick way to see how others power, decouple and connect it. Each board comes with its KiCad files, full parts list and a render — and you can simulate its firmware on HardLabs.
St251n 20603
schlae
137.4 × 199.1 mm277 parts4LNo license38
Coco9511pak
barberd
98.3 × 107.1 mm43 parts2LGPL-3.012
UMMF
nils-eilers
105 × 100 mm63 parts2LNo license10
Betadisk clone
alvaroalea
99.7 × 149.9 mm83 parts2LNo license7
Apollo 7 Squale
jfdelnero
450 × 160 mm219 parts2LNo license6
MiniEconetModule
kgl2001
43.2 × 45.7 mm54 parts4LCC-BY-SA-4.05
Northstar HD-5
abzman
190.6 × 172.4 mm154 parts2LUnlicense4
GSE14
stonedDiscord
163 × 249 mm102 parts2LBSD-2-Clause4
Peoples permacomputer
genossen
208.3 × 146.1 mm121 parts2LCustom license2
6809 Plus EPROM Version
roberto314
248.9 × 139.7 mm165 parts2LBSD-2-Clause1
Exordisk v1
160 × 100 mm110 parts2LNo license1
SimplifiedEconetInstallKit
85 × 56 mm75 parts4LCC-BY-SA-4.01
St296n 20741
137.4 × 199.1 mm269 parts4LNo license38
Tim011 video fix
Board-Folk
84.9 × 57.4 mm30 parts2LNo license8
GIMIX 6809 CPU Plus
248.9 × 139.7 mm165 parts2LBSD-2-Clause1
128 X 16 RAM V4 FINAL
ibm2030
180 × 95 mm108 parts4LNo license13
GIMIX DMA Floppy
248.9 × 139.7 mm124 parts2LBSD-2-Clause1
Exorset Floppy
160 × 100 mm85 parts2LNo license1
St225 20427
136.8 × 199.1 mm212 parts2LNo license38
93c46a type
ethanjamesauto
132.1 × 83.8 mm39 parts2LNo license1
The 74LS123 in open source designs
The gallery holds 20 open source boards using the 74LS123 from 15 GitHub repositories; a typical one measures about 148.7 × 139.7 mm and carries around 109 components.
75% are two-layer designs, the rest use four layers or more, and 40% carry an open source license.
The most starred is St251n 20603 by schlae.
Parts used alongside the 74LS123
What boards using the 74LS123 are built for
74LS123: common questions
Where can I find a 74LS123 reference design?
Each of the 20 boards on this page is a real design using the 74LS123. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
What parts are used alongside the 74LS123?
The 74LS00, 74LS04, 74LS74, 74LS08 and 74LS32 appear in the most repositories here.
How big is a typical board using the 74LS123?
The median is 148.7 × 139.7 mm, and 75% are two-layer designs.
What is the most popular open source board using the 74LS123?
By GitHub stars, St251n 20603 by schlae, with 38 stars.
Can I simulate one of these boards using the 74LS123 before building it?
Yes. HardLabs turns a board's netlist and BOM into a working simulation, so you can boot and test firmware against it with no hardware on your desk.