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2 layers48 × 37.6 mmSwitchBoard, the printed circuit board in 3D

All Pass filter from Jake Rothman, Practical Electronics, June 2026

Size
48 × 37.6 mm
Copper layers
2
Thickness
1.6 mm
Parts
22
Nets
21
Pads
60
Tracks, vias
114, 0
Pours
1
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
18 May 2026
Updated
29 Jun 2026

Overview

SwitchBoard is an open-source printed circuit board by Acramonics, from the Acramonics/AllPassFilter repository on GitHub. It is a 2-layer board of 48 × 37.6 mm with 22 parts on 21 nets, routed with 114 tracks and 0 vias.

Its parts include 9 resistors, 6 capacitors, 3 connectors, 1 diode and 1 switch.

README

kicad_SubBoards/README.md

This uses the SamacSys footprint for the Alpha switch available via the Mouser web site and directly from Component Search Engine

Using the Library

First create a path name for the SamacSys Library:

  1. In the main KiCad window, select Preferences>Configure Paths

  2. Click the + sign and add a path called KICAD_SAMACSYS_LIBS and pointing to wherever the directory is containing the SamacSys_Parts.lib file.

  3. Click OK

Next, configure the symbol library:

  1. In the main KiCad window, select Preferences>Manage Symbol Libraries
  2. Click the + sign and add a new library:
  • Nickname = SamacSys
  • Library Path = ${KICAD_SAMACSYS_LIBS}/SamacSys_Parts.kicad_sym
  • Description = SamacSys Symbols

and click OK.

Finally, configure the footprints library:

  1. In the main KiCad window, select Preferences>Manage Footprint Libraries
  2. Click the + sign and add a new library:
  • Nickname = SamacSys
  • Library Path = ${KICAD_SAMACSYS_LIBS}/SamacSys_Parts.pretty
  • Description = SamacSys Footprints

and click OK.

Parts

22
QtyValueFootprintReferences
6100kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_HorizontalR1, R2, R3, R5, R6, R7
647uFCapacitor_THT:CP_Radial_D5.0mm_P2.50mmC1, C2, C3, C4, C5, C6
222kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_HorizontalR4, R8
2Conn_01x04_PinConnector_Molex:Molex_KK-254_AE-6410-04A_1x04_P2.54mm_VerticalJ1, J2
110K 0.6WResistor_THT:R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_HorizontalR9
1Conn_01x03_PinConnector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_VerticalJ3
1LED_Dual_BidirectionalLED_THT:LED_D5.0mmD1
1SW_4PDT_x4ACRM:PushSwitch_4PDT_2x6Pin_P3.18x2.8SW1

The 20 most common of 22 parts.

Questions

How big is the SwitchBoard PCB?

It measures 48 × 37.6 mm and has 2 copper layers, 1.6 mm thick.

What parts does the SwitchBoard use?

22 parts. 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 SwitchBoard KiCad files?

From the Acramonics/AllPassFilter repository on GitHub, at the commit this page was made from: the board is kicad_SwitchBoard/SwitchBoard.kicad_pcb and its schematic kicad/AllPassFilter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the SwitchBoard design in my own project?

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

More from Acramonics/AllPassFilter

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  • 2 layers54.9 × 39 mmSubBoards, the printed circuit board in 3D

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