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

ModulinAmplifier

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
76.2 × 50.8 mm
Copper layers
2
Thickness
1.6 mm
Parts
27
Nets
21
Pads
101
Tracks, vias
109, 0
Pours
1
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
7 May 2025
Updated
26 Aug 2026

Overview

ModulinAmplifier is an open-source printed circuit board by ConDarth, from the ConDarth/modulin repository on GitHub. It is a 2-layer board of 76.2 × 50.8 mm with 27 parts on 21 nets, routed with 109 tracks and 0 vias.

It is built around the LM386 and TL072. Its parts include 10 capacitors, 4 resistors, 3 connectors, 2 ICs and 2 diodes.

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
3100uUser:C_Radial_Polarized_P3.8mm_CNCC1, C2, C6
21N4148User:D_P7.62mm_CNCD1, D2
21uUser:C_Axial_P5.00mm_CNCC3, C4
110User:R_10.16mm_CNCR4
1100User:R_10.16mm_CNCR2
1100kUser:Potentiometer_Trim_CNCRV2
1100kUser:Potentiometer_PanelMount_CNCRV1
1100nUser:C_Axial_P5.00mm_CNCC10
110kUser:R_7.62mm_CNCR3
110uUser:C_Axial_P5.00mm_CNCC5
11MUser:R_10.16mm_CNCR1
1220uUser:C_Radial_Polarized_P3.8mm_CNCC9
133nUser:C_Axial_P5.00mm_CNCC7
147nUser:C_Axial_P5.00mm_CNCC8
1AudioJack3_SwitchTRConnector_Audio:Jack_3.5mm_CUI_SJ1-3525N_HorizontalJ2
1LM386User:DIP-8_CNCU2
1Screw_Terminal_01x02User:TerminalBlock_1x2_CNCJ3
1Screw_Terminal_01x04User:TerminalBlock_1x4_CNCJ1
1TL072User:DIP-8_CNCU1

The 23 most common of 27 parts.

Questions

How big is the ModulinAmplifier PCB?

It measures 76.2 × 50.8 mm and has 2 copper layers, 1.6 mm thick.

What parts does the ModulinAmplifier use?

27 parts, built around the LM386 and TL072. 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 ModulinAmplifier KiCad files?

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

Can I use the ModulinAmplifier design in my own project?

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

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