2 open source boards using the 3.3V Reg
Real designs built with the 3.3V Reg, 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.
STM32Main board
jkominek
100 × 100 mm148 parts4LCustom license53
STM32ADC Board
92.7 × 83.8 mm100 parts4LCustom license53
The 3.3V Reg in open source designs
The gallery holds 2 open source boards using the 3.3V Reg from 1 GitHub repository; a typical one measures about 96.4 × 91.9 mm and carries around 124 components.
100% use four copper layers or more, and 0% carry an open source license.
The most starred is Main board by jkominek.
Microcontrollers on boards using the 3.3V Reg
3.3V Reg: common questions
Where can I find a 3.3V Reg reference design?
Each of the 2 boards on this page is a real design using the 3.3V Reg. 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 3.3V Reg use?
Most are built on STM32 (2).
How big is a typical board using the 3.3V Reg?
The median is 96.4 × 91.9 mm, and 0% are two-layer designs.
What is the most popular open source board using the 3.3V Reg?
By GitHub stars, Main board by jkominek, with 53 stars.
Can I simulate one of these boards using the 3.3V Reg 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.