2 open source boards using the XT4054K421MR-G

Real designs built with the XT4054K421MR-G, 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 XT4054K421MR-G in open source designs

The gallery holds 2 open source boards using the XT4054K421MR-G from 2 GitHub repositories; a typical one measures about 122.5 × 78 mm and carries around 71 components.

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

The most starred is Nsec badge-2025-baseboard by nsec.

Microcontrollers on boards using the XT4054K421MR-G

ESP32 2

What boards using the XT4054K421MR-G are built for

XT4054K421MR-G: common questions

Where can I find a XT4054K421MR-G reference design?

Each of the 2 boards on this page is a real design using the XT4054K421MR-G. 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 XT4054K421MR-G use?

Most are built on ESP32 (2).

How big is a typical board using the XT4054K421MR-G?

The median is 122.5 × 78 mm, and 50% are two-layer designs.

What is the most popular open source board using the XT4054K421MR-G?

By GitHub stars, Nsec badge-2025-baseboard by nsec, with 61 stars.

Can I simulate one of these boards using the XT4054K421MR-G 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.