3 open source boards using the HC138
Real designs built with the HC138, 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.
NODE DATAPAC 256K bkw remake
bkw777
255.3 × 43.2 mm28 parts2LCustom license7
NODE DATAPAC 256K historical reproduction
254 × 43.2 mm22 parts2LCustom license7
MiniNDP 512 Breadboard
157.5 × 55.9 mm9 parts2LCustom license7
The HC138 in open source designs
The gallery holds 3 open source boards using the HC138 from 1 GitHub repository; a typical one measures about 254 × 43.2 mm and carries around 22 components.
100% are two-layer designs, the rest use four layers or more, and 0% carry an open source license.
The most starred is NODE DATAPAC 256K bkw remake by bkw777.
What boards using the HC138 are built for
HC138: common questions
Where can I find a HC138 reference design?
Each of the 3 boards on this page is a real design using the HC138. 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 HC138?
The median is 254 × 43.2 mm, and 100% are two-layer designs.
What is the most popular open source board using the HC138?
By GitHub stars, NODE DATAPAC 256K bkw remake by bkw777, with 7 stars.
Can I simulate one of these boards using the HC138 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.