3 open source boards using the LM339A

Real designs built with the LM339A, 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 LM339A in open source designs

The gallery holds 3 open source boards using the LM339A from 1 GitHub repository; a typical one measures about 123 × 32.5 mm and carries around 38 components.

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

The most starred is Amkey usb by BASLQC.

Microcontrollers on boards using the LM339A

AVR/Arduino 3

What boards using the LM339A are built for

Keyboards 3

LM339A: common questions

Where can I find a LM339A reference design?

Each of the 3 boards on this page is a real design using the LM339A. 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 LM339A use?

Most are built on AVR/Arduino (3).

How big is a typical board using the LM339A?

The median is 123 × 32.5 mm, and 100% are two-layer designs.

What is the most popular open source board using the LM339A?

By GitHub stars, Amkey usb by BASLQC, with 24 stars.

Can I simulate one of these boards using the LM339A 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.