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2 layers50.8 × 177.8 mmModulinVCF, the printed circuit board in 3D

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
50.8 × 177.8 mm
Copper layers
2
Thickness
1.6 mm
Parts
74
Nets
49
Pads
282
Tracks, vias
375, 24
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
7 May 2025
Updated
26 Aug 2026

Overview

ModulinVCF is an open-source printed circuit board by ConDarth, from the ConDarth/modulin repository on GitHub. It is a 2-layer board of 50.8 × 177.8 mm with 74 parts on 49 nets, routed with 375 tracks and 24 vias.

It is built around the TL072, LM7805 and BC548. Its parts include 28 resistors, 18 capacitors, 12 transistors, 4 ICs and 1 connector.

Main components

3

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

74
QtyValueFootprintReferences
12BC548User:TO-92_CNCQ1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12
710uUser:C_Axial_P5.00mm_CNCC3, C4, C13, C14, C15, C16, C17
5100kUser:R_10.16mm_CNCR1, R2, R3, R19, R27
447nUser:C_Axial_P5.00mm_CNCC7, C8, C9, C10
310uUser:C_Rect_P5.00mm_CNCC1, C2, C12
3150User:R_7.62mm_CNCR5, R9, R10
210k 1%User:R_10.16mm_CNCR20, R21
2220nUser:C_Axial_P5.00mm_CNCC6, C18
2B100kUser:Potentiometer_PanelMount_CNCRV1, RV2
2TL074User:DIP-14_CNCU1, U3
1100pUser:C_Axial_P5.00mm_CNCC5
110kUser:Potentiometer_Trim_CNCRV5
110kUser:R_5.08mm_CNCR18
110kUser:R_10.16mm_CNCR26
110kUser:R_7.62mm_CNCR8
1150User:R_2.54mm_CNCR13
11MUser:R_10.16mm_CNCR7
11M 1%User:R_2.54mm_CNCR22
11M 1%User:R_7.62mm_CNCR23
11kUser:Potentiometer_Trim_CNCRV4
11kUser:R_7.62mm_CNCR15
1220User:R_10.16mm_CNCR16
1220kUser:R_10.16mm_CNCR24
1220uCapacitor_THT:CP_Radial_D8.0mm_P3.80mmC11
122kUser:R_2.54mm_CNCR17
12kUser:R_2.54mm_CNCR4
1330User:R_7.62mm_CNCR14
1330User:R_2.54mm_CNCR11
147User:R_5.08mm_CNCR6
1470User:R_2.54mm_CNC_AltR12
147kUser:R_10.16mm_CNCR25
15.1kUser:R_2.54mm_CNCR28
1500kUser:Potentiometer_Trim_CNCRV6
1C100kUser:Potentiometer_PanelMount_CNCRV3
1LM7805User:TO-220_CNCU2
1Screw_Terminal_01x07User:TerminalBlock_1x7_CNCJ1
1TL072User:DIP-8_CNCU4

The 69 most common of 74 parts.

Questions

How big is the ModulinVCF PCB?

It measures 50.8 × 177.8 mm and has 2 copper layers, 1.6 mm thick.

What parts does the ModulinVCF use?

74 parts, built around the TL072, LM7805 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 ModulinVCF KiCad files?

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

Can I use the ModulinVCF 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 mmModulinAmplifier, the printed circuit board in 3D

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

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

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

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