Ioboard

Eurorack modules collection

This repository contains a collection of eurorack module open hardware designs. It is a combination of designs found elsewhere (with references where relevant), and designs by me.

All schematics and boards are in Kicad format, and schematics, board and gerber exports are automated using KiBot and docker (see export.sh).

Modules

The following modules are available:

• A AS3340-based oscillator designed by me (based on a combination of earlier designs from the internet)
• A PT2399-based delay designed by me (based on a combination of earlier designs from the internet)

• A Dual 4-channel mixer module designed by me (based on basic opamp mixer essentials)
• A Quad Attenuverter with offset, based on an internet design
• Ornament & Crime, a well-known open hardware design
• Ray Wilson's Dual-VCA as originally designed by Gerbrand Sterrenburg
• Roland System 100 ADSR as originally designed by Gerbrand Sterrenburg
• The YUSynth Steiner VCF as originally designed by Gerbrand Sterrenburg
• Music Thing Modular's Turing Machine, a well-known open hardware design

Utilities

• A 16-bin DIP to SOIC adapter board (to mount SOIC chips on DIP sockets)
• A Power distribution board for eurorack modules

Combined bill of material and shopping list

I'm maintaining a merged bill of material for all modules, with component lists in stock at time of writing.

The only exception is the Teensy 3.0 / 3.1 / 3.2 required for Ornament & Crime. Those are impossible to find at the moment (I happen to have some, hence it's on the list).

Generating BOM, gerbers, and pictures

The script export.sh in the root of the project will generate or update the artifacts in the export/ directory, such as BOMs, gerber files, packages, and various documentation pictures. Most of these files are not version-controlled (but those linked from the markdown documentation are).

Whenever changing a schematic, the export script will update the relevant pictures and artifacts. Re-exporting the same schematic will result in the same picture, so git plays nice with this.

Link for simulation of triangle to sine converter

here