Dear colleagues,
as Erica Synths discontinues its legacy DIY eurorack projects, we decided to make them opensource. We created Gerber files for PCB-made front panels and did slight changes in module design in order to get rid of custom and rare components, however some modules still require rare ICs and Delay module - a pre-programmed MCU board, which are available on www.ericasynths.lv.
Projects are available on https://github.com/erica-synths/diy-eurorack, and each project folder contains complete information and files to build a module: schematics, Gerber files for a front panel, Gerber files for PCBs, BOMs, component placement with values and designators and assembly manuals (please, note that some manuals are designed for older module versions).
By making these projects open source, Erica Synths accepts third party use for personal, educational or commercial purposes.
Erica Synths will not provide any support for these projects, please, refer to build threads here on Muffwiggler for information on build nuances, troubleshooting, part availability or alternatives.
Open source projects are:
Bassline – all in one synth voice for acid basslines and drones
BBD delay/flanger – all analogue effects unit based on V3205 BBD IC Delay – tape and digital delay unit with tap tempo, tempo sync, reverse, hold and add functions
Dual VCA – Polivoks architecture inspired dual VCA, rare Russian differential opamps are now replaced with AS3330
Envelope – recreation of Polivoks envelope generator with loop and end of attack functions
MIDI-CV – Polivoks functionality inspired dual MIDI-CV converter with glide function
Mixer – simple 3 chanel audio mixer
Modulator – Polivoks functionality inspired LFO, noise and S&H module
Output – Output module with headphone amplifier
Polivoks VCF – authentic recreation of the Polivoks VCF
Swamp – our take of Wogglebug module with lots of unique extras
VCO3 – Polivoks inspired VCO with nice extra – VCO Sync input
Thank you all for you support previously!
We, in collaboration with Riga Technical University, are now working on educational DIY kits for simple and affordable eurorack modules. We plan to announce them this Autumn.
Girts and Erica Synths team.
