2 open source boards using the 3.3V LDO
Real designs built with the 3.3V LDO, 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.
STM32Stm32c5-bluepill
thomashamain
53.3 × 22.9 mm63 parts2LCC-BY-SA-4.05
ESP32ESP32Pet
dishishshawn
82.3 × 79 mm11 parts2LNo license4
The 3.3V LDO in open source designs
The gallery holds 2 open source boards using the 3.3V LDO from 2 GitHub repositories; a typical one measures about 67.8 × 50.9 mm and carries around 37 components.
100% are two-layer designs, the rest use four layers or more, and 50% carry an open source license.
The most starred is Stm32c5-bluepill by thomashamain.
What boards using the 3.3V LDO are built for
3.3V LDO: common questions
Where can I find a 3.3V LDO reference design?
Each of the 2 boards on this page is a real design using the 3.3V LDO. 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 LDO use?
Most are built on ESP32 (1) and STM32 (1).
How big is a typical board using the 3.3V LDO?
The median is 67.8 × 50.9 mm, and 100% are two-layer designs.
What is the most popular open source board using the 3.3V LDO?
By GitHub stars, Stm32c5-bluepill by thomashamain, with 5 stars.
Can I simulate one of these boards using the 3.3V LDO 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.