2 open source boards using the 6N139

Real designs built with the 6N139, 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.

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The 6N139 in open source designs

The gallery holds 2 open source boards using the 6N139 from 2 GitHub repositories; a typical one measures about 197.5 × 80 mm and carries around 76 components.

100% are two-layer designs, the rest use four layers or more, and 50% carry an open source license.

The most starred is OpenEuroBoard by sensai7.

Microcontrollers on boards using the 6N139

ESP32 1

What boards using the 6N139 are built for

6N139: common questions

Where can I find a 6N139 reference design?

Each of the 2 boards on this page is a real design using the 6N139. 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 6N139 use?

Most are built on ESP32 (1).

How big is a typical board using the 6N139?

The median is 197.5 × 80 mm, and 100% are two-layer designs.

What is the most popular open source board using the 6N139?

By GitHub stars, OpenEuroBoard by sensai7, with 39 stars.

Can I simulate one of these boards using the 6N139 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.