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2 layers180.4 × 80.9 mmAllPassFilter, the printed circuit board in 3D

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

Size
180.4 × 80.9 mm
Copper layers
2
Thickness
1.6 mm
Parts
102
Nets
50
Pads
239
Tracks, vias
484, 4
Pours
1
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
18 May 2026
Updated
29 Jun 2026

Overview

AllPassFilter is an open-source printed circuit board by Acramonics, from the Acramonics/AllPassFilter repository on GitHub. It is a 2-layer board of 180.4 × 80.9 mm with 102 parts on 50 nets, routed with 484 tracks and 4 vias.

It is built around the NE5532. Its parts include 41 resistors, 34 capacitors, 6 connectors and 5 ICs.

Main components

1

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

102
QtyValueFootprintReferences
241k2Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_HorizontalR12, R13, R14, R16, R17, R18, R20, R21, R22, R24, R25, R26, R27, R28, R29, R30 +8
10TestPointTestPoint:TestPoint_THTPad_D1.5mm_Drill0.7mmTP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10
8100nF PPCapacitor_THT:C_Rect_L7.2mm_W5.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2C6, C9, C12, C15, C18, C21, C24, C27
8100pF C0GCapacitor_THT:C_Disc_D5.1mm_W3.2mm_P5.00mmC7, C10, C13, C16, C19, C22, C25, C28
84k7Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_HorizontalR2, R3, R4, R5, R7, R8, R9, R10
5100nF X7RCapacitor_THT:C_Rect_L7.2mm_W5.5mm_P5.00mm_FKS2_FKP2_MKS2_MKP2C17, C20, C23, C26, C29
5NE5532Package_DIP:DIP-8_W7.62mmU1, U2, U3, U4, U5
410uF 25V AudioCapacitor_THT:CP_Radial_D4.0mm_P1.50mmC5, C8, C11, C14
447pF C0GCapacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mmC2, C4, C33, C34
4InfResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_HorizontalR11, R15, R19, R23
2100uF 25V GPCapacitor_THT:CP_Radial_D6.3mm_P2.50mmC30, C31
210uF 25V NPCapacitor_THT:C_Radial_D4.0mm_H7.0mm_P1.50mmC1, C3
21MResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_HorizontalR1, R6
2Conn_01x03_PinConnector_Molex:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_VerticalJ2, J9
1100RResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_HorizontalR39
1100kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_HorizontalR40
1100uF 25V AudioCapacitor_THT:CP_Radial_D8.0mm_P3.50mmC32
122kResistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_HorizontalR41
1Conn_01x02_PinConnector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_VerticalJ7
1Conn_01x05_PinConnector_Molex:Molex_KK-254_AE-6410-05A_1x05_P2.54mm_VerticalJ5
1Conn_01x08_PinConnector_Molex:Molex_KK-254_AE-6410-08A_1x08_P2.54mm_VerticalJ8
1Conn_01x10_PinConnector_Molex:Molex_KK-254_AE-6410-10A_1x10_P2.54mm_VerticalJ6
1SolderJumper_2_OpenJumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mmJP1
1TestPoint_2PoleTestPoint:TestPoint_Bridge_Pitch2.54mm_Drill0.7mmTP11

The 98 most common of 102 parts.

Questions

How big is the AllPassFilter PCB?

It measures 180.4 × 80.9 mm and has 2 copper layers, 1.6 mm thick.

What parts does the AllPassFilter use?

102 parts, built around the NE5532. 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 AllPassFilter KiCad files?

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

Can I use the AllPassFilter 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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    All Pass filter from Jake Rothman, Practical Electronics, June 2026

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