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2 layers74.9 × 62.2 mmModulinTest, the printed circuit board in 3D

ModulinTest

ConDarth/modulin

This repository holds all data for th modulin I am building. The concept behind this design is to make a fully analog synthesizer using only standard components, with a fun control system based on a violin.

Size
74.9 × 62.2 mm
Copper layers
2
Thickness
1.6 mm
Parts
27
Nets
71
Pads
126
Tracks, vias
13, 2
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
7 May 2025
Updated
26 Aug 2026

Overview

ModulinTest is an open-source printed circuit board by ConDarth, from the ConDarth/modulin repository on GitHub. It is a 2-layer board of 74.9 × 62.2 mm with 27 parts on 71 nets, routed with 13 tracks and 2 vias.

It is built around the TL072 and BC548. Its parts include 6 resistors, 5 diodes, 3 capacitors, 3 ICs and 2 connectors.

Main components

2

README

README.md

Modulin

This repository holds all data for th modulin I am building. The concept behind this design is to make a fully analog synthesizer using only standard components, with a fun control system based on a violin. This project is mostly based on a design Martin Molin of Wintergatan. An explanation of his design can be found here.

My goal in improving this design is to make it more accessible. His design uses 9 or so prebuilt modules meant for modular synthesizers, each of which costs in the range of 70$+ making the instrument quite expensive for a diy build. I took inspiration from the modular synth DIY community to instead try and build the necessary modules from scratch using only much cheaper standard electronics components. The components I am limiting myself to are resistors, capacitors, inductors/transformers, diodes, transistors (both BJT and FET), op amps and linear voltage regulators.

Parts

27
QtyValueFootprintReferences
2R_USUser:R_10.16mm_CNCR4, R6
11N4148User:D_P2.54mm_CNCD1
11N4148User:D_P10.16mm_CNCD4
11N4148User:D_P12.70mm_CNCD5
11N4148User:D_P7.62mm_CNCD3
11N4148User:D_P5.08mm_CNCD2
1BC548User:TO-92_CNCQ1
1CUser:C_Rect_P5.00mm_CNCC1
1C_USUser:C_Radial_Polarized_P7.50mm_CNCC3
1C_USUser:C_Radial_Polarized_P2.5mm_CNCC2
1Conn_01x02_SocketUser:TerminalBlock_1x2_CNCJ1
1Conn_01x03_SocketUser:TerminalBlock_1x3_CNCJ2
1LM7805_TO220User:TO-220_CNCU3
1R_Potentiometer_MountingPinUser:Potentiometer_PanelMount_CNCRV1
1R_Potentiometer_TrimUser:Potentiometer_Trim_CNCRV2
1R_USUser:R_5.08mm_CNCR2
1R_USUser:R_2.54mm_CNCR1
1R_USUser:R_15.24mm_CNCR5
1R_USUser:R_7.62mm_CNCR3
1SW_SPDTUser:SW_Slide_SPST_H6.00mm_CNCSW1
1TL072User:DIP8_CNCU2
1TL074User:DIP-14_CNCU1

The 23 most common of 27 parts.

Questions

How big is the ModulinTest PCB?

It measures 74.9 × 62.2 mm and has 2 copper layers, 1.6 mm thick.

What parts does the ModulinTest use?

27 parts, built around the TL072 and BC548. 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 ModulinTest KiCad files?

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

Can I use the ModulinTest design in my own project?

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

More from ConDarth/modulin

7
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  • 2 layers76.2 × 50.8 mmModulinVCA, the printed circuit board in 3D

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  • 2 layers76.2 × 50.8 mmModulinAmplifier, the printed circuit board in 3D

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  • 2 layers76.2 × 50.8 mmModulinControl, the printed circuit board in 3D

    ModulinControl

    ConDarth/modulin

    This repository holds all data for th modulin I am building. The concept behind this design is to make a fully analog synthesizer using only standard components, with a fun control system based on a violin.

    23 parts
  • 2 layers25.4 × 177.8 mmModulinPowerSupply, the printed circuit board in 3D

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    23 parts

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