18 open source boards using the PCA9555PW
Real designs built with the PCA9555PW, 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.
AVR/ArduinoPhase
mjpauly
128 × 92.6 mm66 parts2LNo license15
MC5000 DevKit
RickP
100 × 97.5 mm77 parts2LGPL-3.06
Raspberry PiMothbox 5.0.4
Digital-Naturalism-Laboratories
237 × 139 mm159 parts2LMIT2
ESP32ESP32 LORA Chat
jharvey
121.9 × 101.6 mm222 parts4LGPL-3.01
The Interchange Keyboard - Right Module
headblockhead
175.6 × 104 mm124 parts2LCERN-OHL-S-2.01
AVR/ArduinoCentral control
adarwoo
103 × 107 mm147 parts4LNo license0
ESP32Orc
aramder
95 × 82 mm81 parts2LCustom license0
Buttons2 waveshare eth esp32s3
FlamingLotusGirls
56 × 92 mm52 parts2LMIT0
Pando - Right
jyap808
144.1 × 121.5 mm70 parts2LCERN-OHL-S-2.010
Raspberry PiMothbox 5.0.6
237 × 139.1 mm159 parts2LMIT2
Slab Keyboard - Left Module
158 × 104 mm113 parts2LCERN-OHL-S-2.01
Haven buttons2.kicad pro
56 × 92 mm52 parts2LMIT0
Slab Keyboard - Hackpad Module
125.2 × 95 mm101 parts2LCERN-OHL-S-2.01
Haven buttons1
56 × 92 mm50 parts2LMIT0
Raspberry PiZoxnoxious Backplane and VCA
brer-rabbit
133.8 × 102.9 mm86 parts4LGPL-3.068
SensactInpExt2
klaus-liebler
90 × 66 mm139 parts2LApache-2.04
AVR/ArduinoConsole left
55 × 84.5 mm55 parts2LNo license0
Console right
69.3 × 87 mm40 parts2LNo license0
The PCA9555PW in open source designs
The gallery holds 18 open source boards using the PCA9555PW from 11 GitHub repositories; a typical one measures about 112.5 × 96.3 mm and carries around 84 components.
83% are two-layer designs, the rest use four layers or more, and 72% carry an open source license.
The most starred is Zoxnoxious Backplane and VCA by brer-rabbit.
Microcontrollers on boards using the PCA9555PW
What boards using the PCA9555PW are built for
PCA9555PW: common questions
Where can I find a PCA9555PW reference design?
Each of the 18 boards on this page is a real design using the PCA9555PW. 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 PCA9555PW use?
Most are built on AVR/Arduino (3), Raspberry Pi (3) and ESP32 (2).
How big is a typical board using the PCA9555PW?
The median is 112.5 × 96.3 mm, and 83% are two-layer designs.
What is the most popular open source board using the PCA9555PW?
By GitHub stars, Zoxnoxious Backplane and VCA by brer-rabbit, with 68 stars.
Can I simulate one of these boards using the PCA9555PW 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.