10 open source boards using the 74LS145
Real designs built with the 74LS145, 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.
- schematic only · 84 parts
Nanocomp6809
breadboardinglabs
84 partsApache-2.024 
RP2040/RP2350Econopet
DLehenbauer
262.5 × 108 mm284 parts2LCC0-1.018
RP2040/RP2350Commodore pet clone
262.5 × 108 mm258 parts2LCC0-1.013
Lynx-Keyboard
Board-Folk
307 × 108 mm67 parts2LNo license4
KIM-1 RAMpager
hkzlab
123.4 × 134.6 mm65 parts2LCC-BY-NC-4.01
Omega-Keyboard
skiselev
333.4 × 124.5 mm96 parts2LGPL-3.0456
Omega-Keyboard
merlinkv
333.4 × 124.5 mm96 parts2LGPL-3.040
Omega-Keyboard
msx-solis
333.4 × 124.5 mm96 parts2LGPL-3.07
AVR/ArduinoLynx-PS2
75.9 × 76.5 mm23 parts2LNo license4
ServicetastaturWeissFake
stonedDiscord
153.7 × 67.3 mm43 parts2LBSD-2-Clause4
The 74LS145 in open source designs
The gallery holds 10 open source boards using the 74LS145 from 9 GitHub repositories; a typical one measures about 262.5 × 108 mm and carries around 90 components.
100% are two-layer designs, the rest use four layers or more, and 70% carry an open source license.
The most starred is Omega-Keyboard by skiselev.
Parts used alongside the 74LS145
Microcontrollers on boards using the 74LS145
What boards using the 74LS145 are built for
74LS145: common questions
Where can I find a 74LS145 reference design?
Each of the 10 boards on this page is a real design using the 74LS145. 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 74LS145?
The 74LS07, 74LS245, AS6C1008, LM317AG-TN3-R and RP2040 appear in the most repositories here.
Which microcontrollers do boards using the 74LS145 use?
Most are built on RP2040/RP2350 (2) and AVR/Arduino (1).
How big is a typical board using the 74LS145?
The median is 262.5 × 108 mm, and 100% are two-layer designs.
What is the most popular open source board using the 74LS145?
By GitHub stars, Omega-Keyboard by skiselev, with 456 stars.
Can I simulate one of these boards using the 74LS145 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.