6 open source boards using the PCA9555D
Real designs built with the PCA9555D, 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.
Zoxnoxious Z5524 (SSI2130/AS3394)
brer-rabbit
80 × 80 mm222 parts4LGPL-3.068
RP2040/RP2350Riptide
SharKingStudios
330 × 123 mm250 parts2LMIT18
ESP32Load Demand Response System
jsitech4
198.1 × 130.8 mm133 parts4LNo license0
ESP32Smart Home Energy Management System
198.1 × 130.8 mm133 parts4LNo license0
Z3340 VCO
80 × 80 mm139 parts4LGPL-3.068
ESP32Smart Hybrid IOT energy management System
198.1 × 130.8 mm133 parts4LNo license0
The PCA9555D in open source designs
The gallery holds 6 open source boards using the PCA9555D from 3 GitHub repositories; a typical one measures about 198.1 × 126.9 mm and carries around 136 components.
83% use four copper layers or more, and 50% carry an open source license.
The most starred is Zoxnoxious Z5524 (SSI2130/AS3394) by brer-rabbit.
Microcontrollers on boards using the PCA9555D
What boards using the PCA9555D are built for
PCA9555D: common questions
Where can I find a PCA9555D reference design?
Each of the 6 boards on this page is a real design using the PCA9555D. 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 PCA9555D use?
Most are built on ESP32 (3) and RP2040/RP2350 (1).
How big is a typical board using the PCA9555D?
The median is 198.1 × 126.9 mm, and 17% are two-layer designs.
What is the most popular open source board using the PCA9555D?
By GitHub stars, Zoxnoxious Z5524 (SSI2130/AS3394) by brer-rabbit, with 68 stars.
Can I simulate one of these boards using the PCA9555D 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.