3 open source boards using the 74HC138D
Real designs built with the 74HC138D, 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.
AVR/ArduinoCode
evyd13
55.5 × 33 mm29 parts2LCC-BY-SA-4.016
ESP32Sunrise clock main board
atoomnetmarc
160 × 106.7 mm124 parts2LApache-2.00
AVR/ArduinoWasdat
55.5 × 33 mm20 parts2LCC-BY-SA-4.016
The 74HC138D in open source designs
The gallery holds 3 open source boards using the 74HC138D from 2 GitHub repositories; a typical one measures about 55.5 × 33 mm and carries around 29 components.
100% are two-layer designs, the rest use four layers or more, and 100% carry an open source license.
The most starred is Code by evyd13.
Microcontrollers on boards using the 74HC138D
What boards using the 74HC138D are built for
74HC138D: common questions
Where can I find a 74HC138D reference design?
Each of the 3 boards on this page is a real design using the 74HC138D. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
Which microcontrollers do boards using the 74HC138D use?
Most are built on AVR/Arduino (2) and ESP32 (1).
How big is a typical board using the 74HC138D?
The median is 55.5 × 33 mm, and 100% are two-layer designs.
What is the most popular open source board using the 74HC138D?
By GitHub stars, Code by evyd13, with 16 stars.
Can I simulate one of these boards using the 74HC138D 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.