4 open source boards using the C29981
Real designs built with the C29981, 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.
Twomes opentherm monitor hardware
energietransitie
31.1 × 34.5 mm28 parts2LCERN-OHL-P-2.03
RP2040/RP2350Supercap
Twisted-Fields
109 × 155.5 mm184 parts4LNo license81
ESP32Megaboard Rear V3
Kolmanpg
155.3 × 110.3 mm180 parts4LNo license0
NewKicadProject
henkjannl
46.5 × 18.5 mm17 parts2LMIT1
The C29981 in open source designs
The gallery holds 4 open source boards using the C29981 from 4 GitHub repositories; a typical one measures about 77.8 × 72.4 mm and carries around 104 components.
50% are two-layer designs, the rest use four layers or more, and 50% carry an open source license.
The most starred is Supercap by Twisted-Fields.
Microcontrollers on boards using the C29981
What boards using the C29981 are built for
C29981: common questions
Where can I find a C29981 reference design?
Each of the 4 boards on this page is a real design using the C29981. 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 C29981 use?
Most are built on ESP32 (1) and RP2040/RP2350 (1).
How big is a typical board using the C29981?
The median is 77.8 × 72.4 mm, and 50% are two-layer designs.
What is the most popular open source board using the C29981?
By GitHub stars, Supercap by Twisted-Fields, with 81 stars.
Can I simulate one of these boards using the C29981 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.