4 open source boards using the TYPE-C-31-M-12
Real designs built with the TYPE-C-31-M-12, 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/RP2350Key ripper
bschwind
285.8 × 116.7 mm211 parts2LApache-2.0288
ESP32Nsec badge-2025
nsec
89 × 123.4 mm80 parts2LMIT61
ESP32Nsec badge-2025-panel
197 × 249.7 mm80 parts2LMIT61
ESP32Nsec badge-2025-baseboard
150 × 70 mm42 parts2LMIT61
The TYPE-C-31-M-12 in open source designs
The gallery holds 4 open source boards using the TYPE-C-31-M-12 from 2 GitHub repositories; a typical one measures about 173.5 × 120 mm and carries around 80 components.
100% are two-layer designs, the rest use four layers or more, and 100% carry an open source license.
The most starred is Key ripper by bschwind.
Microcontrollers on boards using the TYPE-C-31-M-12
What boards using the TYPE-C-31-M-12 are built for
TYPE-C-31-M-12: common questions
Where can I find a TYPE-C-31-M-12 reference design?
Each of the 4 boards on this page is a real design using the TYPE-C-31-M-12. 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 TYPE-C-31-M-12 use?
Most are built on ESP32 (3) and RP2040/RP2350 (1).
How big is a typical board using the TYPE-C-31-M-12?
The median is 173.5 × 120 mm, and 100% are two-layer designs.
What is the most popular open source board using the TYPE-C-31-M-12?
By GitHub stars, Key ripper by bschwind, with 288 stars.
Can I simulate one of these boards using the TYPE-C-31-M-12 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.