6 open source boards using the SL2.1s
Real designs built with the SL2.1s, 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.
Nrf52840-x3
ugokutennp
79.9 × 28.4 mm19 parts2LMIT8
Uhub
JBlitzar
30.7 × 55 mm35 parts2LGPL-3.03
RP2040/RP2350Auth75
Lumethra
326.7 × 132.3 mm208 parts2LNo license1
CADPad
175.4 × 142.7 mm97 parts2LNo license1
SL2.1-USB-Hub
Outdatedcandy92
82 × 37 mm54 parts2LCERN-OHL-W-2.01
RP2040/RP2350CybdoKeebs hub
Cybdo
290 × 24 mm72 parts2LNo license0
The SL2.1s in open source designs
The gallery holds 6 open source boards using the SL2.1s from 6 GitHub repositories; a typical one measures about 128.7 × 46 mm and carries around 63 components.
100% are two-layer designs, the rest use four layers or more, and 50% carry an open source license.
The most starred is Nrf52840-x3 by ugokutennp.
Parts used alongside the SL2.1s
Microcontrollers on boards using the SL2.1s
What boards using the SL2.1s are built for
SL2.1s: common questions
Where can I find a SL2.1s reference design?
Each of the 6 boards on this page is a real design using the SL2.1s. 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 SL2.1s use?
Most are built on RP2040/RP2350 (2).
How big is a typical board using the SL2.1s?
The median is 128.7 × 46 mm, and 100% are two-layer designs.
What is the most popular open source board using the SL2.1s?
By GitHub stars, Nrf52840-x3 by ugokutennp, with 8 stars.
Can I simulate one of these boards using the SL2.1s 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.