6 open source boards using the CJ125
Real designs built with the CJ125, 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.
STM32RT-STACK
fupsrl
150 × 150 mm472 parts6LCC-BY-NC-4.014
M52
rusefi
145 × 118 mm226 parts2LNo license2
STM32Frankenso
147.6 × 102 mm127 parts2LNo license2
Wideband Module
45.4 × 22 mm38 parts2LNo license13
CJ125 Wide O2
18.2 × 34.3 mm39 parts2LNo license2
Ion
66 × 31.8 mm34 parts2LNo license2
The CJ125 in open source designs
The gallery holds 6 open source boards using the CJ125 from 3 GitHub repositories; a typical one measures about 105.5 × 68.1 mm and carries around 83 components.
83% are two-layer designs, the rest use four layers or more, and 0% carry an open source license.
The most starred is RT-STACK by fupsrl.
Microcontrollers on boards using the CJ125
CJ125: common questions
Where can I find a CJ125 reference design?
Each of the 6 boards on this page is a real design using the CJ125. 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 CJ125 use?
Most are built on STM32 (2).
How big is a typical board using the CJ125?
The median is 105.5 × 68.1 mm, and 83% are two-layer designs.
What is the most popular open source board using the CJ125?
By GitHub stars, RT-STACK by fupsrl, with 14 stars.
Can I simulate one of these boards using the CJ125 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.