3 open source boards using the 74LS109
Real designs built with the 74LS109, 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.
OpenC64WarpSpeed
SukkoPera
58.4 × 61.7 mm15 parts2LCustom license50- schematic only · 39 parts
Grid compass fdd-2102
vklachkov
39 partsNo license2 
Core 1
draklowell
100 × 99.5 mm21 parts2LGPL-3.03
The 74LS109 in open source designs
The gallery holds 3 open source boards using the 74LS109 from 3 GitHub repositories; a typical one measures about 79.2 × 80.6 mm and carries around 21 components.
100% are two-layer designs, the rest use four layers or more, and 33% carry an open source license.
The most starred is OpenC64WarpSpeed by SukkoPera.
What boards using the 74LS109 are built for
74LS109: common questions
Where can I find a 74LS109 reference design?
Each of the 3 boards on this page is a real design using the 74LS109. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
How big is a typical board using the 74LS109?
The median is 79.2 × 80.6 mm, and 100% are two-layer designs.
What is the most popular open source board using the 74LS109?
By GitHub stars, OpenC64WarpSpeed by SukkoPera, with 50 stars.
Can I simulate one of these boards using the 74LS109 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.