2 open source boards using the BMA423

Real designs built with the BMA423, 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 BMA423 in open source designs

The gallery holds 2 open source boards using the BMA423 from 2 GitHub repositories; a typical one measures about 33.8 × 46 mm and carries around 69 components.

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

The most starred is Watchy hardware v2 by xywatch.

Parts used alongside the BMA423

TP4054 2

Microcontrollers on boards using the BMA423

What boards using the BMA423 are built for

BMA423: common questions

Where can I find a BMA423 reference design?

Each of the 2 boards on this page is a real design using the BMA423. 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 BMA423 use?

Most are built on ESP32 (1) and RP2040/RP2350 (1).

How big is a typical board using the BMA423?

The median is 33.8 × 46 mm, and 50% are two-layer designs.

What is the most popular open source board using the BMA423?

By GitHub stars, Watchy hardware v2 by xywatch, with 7 stars.

Can I simulate one of these boards using the BMA423 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.