6 open source boards using the FE2.1
Real designs built with the FE2.1, 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.
AVR/ArduinoLeeChee
Gacathon
378.4 × 156.9 mm556 parts2LNo license9
RhapsodiePi
theBrutzler
85.2 × 56.1 mm261 parts6LNo license4
USB Hub
Andy-Cheng1017
20 × 55 mm69 parts4LNo license1
RhapsodiePi Routing V1
85.2 × 56.1 mm261 parts6LNo license4
USB Hub Panelization
20 × 55 mm69 parts4LNo license1
STM32Custom keyboard (f303, fe2.1)
howardt12345
395.3 × 138.1 mm413 parts2LCC-BY-NC-4.014
The FE2.1 in open source designs
The gallery holds 6 open source boards using the FE2.1 from 4 GitHub repositories; a typical one measures about 85.2 × 56.1 mm and carries around 261 components.
67% use four copper layers or more, and 0% carry an open source license.
The most starred is Custom keyboard (f303, fe2.1) by howardt12345.
Microcontrollers on boards using the FE2.1
What boards using the FE2.1 are built for
FE2.1: common questions
Where can I find a FE2.1 reference design?
Each of the 6 boards on this page is a real design using the FE2.1. 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 FE2.1 use?
Most are built on AVR/Arduino (1) and STM32 (1).
How big is a typical board using the FE2.1?
The median is 85.2 × 56.1 mm, and 33% are two-layer designs.
What is the most popular open source board using the FE2.1?
By GitHub stars, Custom keyboard (f303, fe2.1) by howardt12345, with 14 stars.
Can I simulate one of these boards using the FE2.1 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.