7 open source boards using the 74HCT138
Real designs built with the 74HCT138, 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.
Msxdos2s
b3rendsh
99.8 × 64.1 mm35 parts2LCC-BY-NC-4.024
23xx-Adapter
Beaupre-Circuit-Design
19.7 × 41.9 mm9 parts4LMIT3
FrontPanel
89Mods
258.1 × 122.9 mm118 parts2LMIT2
Rc-256page
PickledDog
99.1 × 49.9 mm12 parts2LApache-2.02
TTL 6510 Computer
StefansAI
368.3 × 215.9 mm330 parts2LNo license1
TTL 6510 Computer
368.3 × 215.9 mm330 parts2LNo license1
Raspberry PiZoxnoxious Backplane and VCA
brer-rabbit
133.8 × 102.9 mm86 parts4LGPL-3.068
The 74HCT138 in open source designs
The gallery holds 7 open source boards using the 74HCT138 from 6 GitHub repositories; a typical one measures about 133.8 × 102.9 mm and carries around 86 components.
71% are two-layer designs, the rest use four layers or more, and 57% carry an open source license.
The most starred is Zoxnoxious Backplane and VCA by brer-rabbit.
Parts used alongside the 74HCT138
Microcontrollers on boards using the 74HCT138
What boards using the 74HCT138 are built for
74HCT138: common questions
Where can I find a 74HCT138 reference design?
Each of the 7 boards on this page is a real design using the 74HCT138. 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 74HCT138?
The 74HCT04, 74HCT245, 74HCT32 and SST39SF010 appear in the most repositories here.
Which microcontrollers do boards using the 74HCT138 use?
Most are built on Raspberry Pi (1).
How big is a typical board using the 74HCT138?
The median is 133.8 × 102.9 mm, and 71% are two-layer designs.
What is the most popular open source board using the 74HCT138?
By GitHub stars, Zoxnoxious Backplane and VCA by brer-rabbit, with 68 stars.
Can I simulate one of these boards using the 74HCT138 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.