1 open source board using the PCA9641 (or PCA9541)
Real designs built with the PCA9641 (or PCA9541), 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.
ja1umiThe PCA9641 (or PCA9541) in open source designs
The gallery holds 1 open source boards using the PCA9641 (or PCA9541) from 1 GitHub repository; a typical one measures about 155 × 114 mm and carries around 181 components.
100% are two-layer designs, the rest use four layers or more, and 100% carry an open source license.
The most starred is MUTIF09 I/O Expansion Board by ja1umi.
What boards using the PCA9641 (or PCA9541) are built for
PCA9641 (or PCA9541): common questions
Where can I find a PCA9641 (or PCA9541) reference design?
Each of the 1 boards on this page is a real design using the PCA9641 (or PCA9541). 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 PCA9641 (or PCA9541)?
The median is 155 × 114 mm, and 100% are two-layer designs.
What is the most popular open source board using the PCA9641 (or PCA9541)?
By GitHub stars, MUTIF09 I/O Expansion Board by ja1umi, with 10 stars.
Can I simulate one of these boards using the PCA9641 (or PCA9541) 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.