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2 layers40 × 40 mmController, the printed circuit board in 3D

Controller

Ken-2511/LDO

Two KiCad 10 projects, stacked on the same 40x40 mm footprint:

Full screenGitHub.kicad_pcb
Size
40 × 40 mm
Copper layers
2
Thickness
1.6 mm
Parts
10
Nets
15
Pads
36
Tracks, vias
37, 14
Pours
5
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
24 Oct 2026
Updated
7 Nov 2026

Overview

Controller is an open-source printed circuit board by Ken-2511, from the Ken-2511/LDO repository on GitHub. It is a 2-layer board of 40 × 40 mm with 10 parts on 15 nets, routed with 37 tracks and 14 vias.

It is built around the XIAO NRF52840, CL21A106KAYNNNE and MF-NSMF050-2, with the PM254V-12-10P-H85 among its other parts. Its parts include 2 resistors, 1 capacitor, 1 IC, 1 connector and 1 fuse. It belongs with the nRF52 and nRF5x boards of this library.

Main components

4

README

README.md

Stackable BLE low-noise power supply (PoC)

Two KiCad 10 projects, stacked on the same 40x40 mm footprint:

  • controller/: Seeed XIAO nRF52840 board at the bottom of the stack. It supplies 5V (from USB) and 3.3V, and carries the I2C pull-ups.
  • ldo/: LDO board, one LT3042 channel set by a DAC60502 and read back by an INA226. Up to 4 boards stack on the controller, each on its own I2C address.

The boards connect through a 2x5 stacking header (J1) at the same position on every board: pins 1-2 +5V, pin 3 +3V3, pin 5 SDA, pin 7 SCL, pins 4, 6, 8, 9, 10 GND.

Parts

10
QtyValueFootprintReferences
4M3MountingHole:MountingHole_3.2mm_M3H1, H2, H3, H4
24.7kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR1, R2
110uF 25VCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC1
1500mAFuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolderF1
1Stack_2x05Connector_PinSocket_2.54mm:PinSocket_2x05_P2.54mm_VerticalJ1
1XIAO_nRF52840controller:XIAO_nRF52840_SMDU1

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Questions

How big is the Controller PCB?

It measures 40 × 40 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Controller use?

10 parts, built around the XIAO NRF52840, CL21A106KAYNNNE, MF-NSMF050-2 and PM254V-12-10P-H85. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Controller KiCad files?

From the Ken-2511/LDO repository on GitHub, at the commit this page was made from: the board is controller/controller.kicad_pcb and its schematic controller/controller.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Controller design in my own project?

Its repository states no licence, so its author keeps all rights: ask Ken-2511 before reusing the design.