6 open source boards using the CAT24C128
Real designs built with the CAT24C128, 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/ArduinoArduino ads129x
OpenElectronicsLab
197 × 71 mm267 partsGPL-3.0102
STM32Node base
LanternD
78 × 40 mm73 parts2LApache-2.06
RP2040/RP2350GPSDO
pwengel
97.4 × 75.4 mm115 parts2LNo license2
AVR/ArduinoIncubator
MariwanJ
124 × 70.2 mm42 parts2LGPL-3.01
AVR/ArduinoFull Circuit
EthanSousaProjects
110 × 110 mm72 parts2LGPL-3.00
AVR/ArduinoPatch shield digital
197 × 71 mm77 partsGPL-3.0102
The CAT24C128 in open source designs
The gallery holds 6 open source boards using the CAT24C128 from 5 GitHub repositories; a typical one measures about 117 × 71 mm and carries around 75 components.
100% are two-layer designs, the rest use four layers or more, and 83% carry an open source license.
The most starred is Arduino ads129x by OpenElectronicsLab.
Microcontrollers on boards using the CAT24C128
What boards using the CAT24C128 are built for
CAT24C128: common questions
Where can I find a CAT24C128 reference design?
Each of the 6 boards on this page is a real design using the CAT24C128. 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 CAT24C128 use?
Most are built on AVR/Arduino (4), RP2040/RP2350 (1) and STM32 (1).
How big is a typical board using the CAT24C128?
The median is 117 × 71 mm, and 100% are two-layer designs.
What is the most popular open source board using the CAT24C128?
By GitHub stars, Arduino ads129x by OpenElectronicsLab, with 102 stars.
Can I simulate one of these boards using the CAT24C128 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.