4 open source boards using the FJ08K
Real designs built with the FJ08K, 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.
RP2040/RP2350V4d2 pico
tomcombriat
54.2 × 94.2 mm99 parts2LTAPR-OHL-1.03
RP2040/RP2350V4d3 pico
54.2 × 94.2 mm99 parts2LTAPR-OHL-1.03
RP2040/RP2350V4 pico
54.2 × 95.2 mm96 parts2LTAPR-OHL-1.03
RP2040/RP2350V4d1 pico
54.2 × 95.2 mm96 parts2LTAPR-OHL-1.03
The FJ08K in open source designs
The gallery holds 4 open source boards using the FJ08K from 1 GitHub repository; a typical one measures about 54.2 × 94.7 mm and carries around 98 components.
100% are two-layer designs, the rest use four layers or more, and 100% carry an open source license.
The most starred is V4d2 pico by tomcombriat.
Microcontrollers on boards using the FJ08K
FJ08K: common questions
Where can I find a FJ08K reference design?
Each of the 4 boards on this page is a real design using the FJ08K. 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 FJ08K use?
Most are built on RP2040/RP2350 (4).
How big is a typical board using the FJ08K?
The median is 54.2 × 94.7 mm, and 100% are two-layer designs.
What is the most popular open source board using the FJ08K?
By GitHub stars, V4d2 pico by tomcombriat, with 3 stars.
Can I simulate one of these boards using the FJ08K 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.