3 open source boards using the 74LS40
Real designs built with the 74LS40, 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.
Sch
DownUnderCTF
150 × 110 mm47 parts4LNo license115
SintetizadorGuidoStolfi
ArqueologiaDigital
153.2 × 95.2 mm46 parts2LNo license0
UB8840 breakout
89Mods
114.3 × 31.1 mm11 parts2LMIT3
The 74LS40 in open source designs
The gallery holds 3 open source boards using the 74LS40 from 3 GitHub repositories; a typical one measures about 149.9 × 95.2 mm and carries around 46 components.
67% are two-layer designs, the rest use four layers or more, and 33% carry an open source license.
The most starred is Sch by DownUnderCTF.
What boards using the 74LS40 are built for
74LS40: common questions
Where can I find a 74LS40 reference design?
Each of the 3 boards on this page is a real design using the 74LS40. 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 74LS40?
The median is 149.9 × 95.2 mm, and 67% are two-layer designs.
What is the most popular open source board using the 74LS40?
By GitHub stars, Sch by DownUnderCTF, with 115 stars.
Can I simulate one of these boards using the 74LS40 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.