5 open source boards using the 74LS27
Real designs built with the 74LS27, 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.
Junior interface
laurent-fr
217.2 × 113 mm116 parts2LCC-BY-NC-4.013
Commodore Plus 4
baldengineer
284.7 × 158.9 mm212 parts2LCC-BY-4.0442
ZX81 Centronics
BrettHallen
68.8 × 82.6 mm18 parts2LNo license5
Junior universal memory
160 × 100 mm38 parts2LCC-BY-NC-4.013
AVR/ArduinoZ80DMA2
lynchaj
100 × 100 mm59 parts2LNo license31
The 74LS27 in open source designs
The gallery holds 5 open source boards using the 74LS27 from 4 GitHub repositories; a typical one measures about 160 × 100 mm and carries around 59 components.
100% are two-layer designs, the rest use four layers or more, and 20% carry an open source license.
The most starred is Commodore Plus 4 by baldengineer.
Microcontrollers on boards using the 74LS27
What boards using the 74LS27 are built for
74LS27: common questions
Where can I find a 74LS27 reference design?
Each of the 5 boards on this page is a real design using the 74LS27. 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 74LS27?
The 74LS04, 74LS08, 74LS139, 74LS175 and 74LS241 appear in the most repositories here.
Which microcontrollers do boards using the 74LS27 use?
Most are built on AVR/Arduino (1).
How big is a typical board using the 74LS27?
The median is 160 × 100 mm, and 100% are two-layer designs.
What is the most popular open source board using the 74LS27?
By GitHub stars, Commodore Plus 4 by baldengineer, with 442 stars.
Can I simulate one of these boards using the 74LS27 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.