DIY Eurorack Synthesiser Projects

Oakley Sound Systems have been producing DIY synthesiser modules for over two decades and on this page you will find my range of Eurorack designs.

Oakley modules are designed to be constructed by yourself using our bare printed circuit boards. Full building instructions can be found on each of the project's own webpage.

For technical support on all Oakley projects please refer to the knowledgeable and helpful Oakley Sound Forum which is hosted at Tony Allgood does not provide official building support for Oakley projects, but he and many others are usually available for help via the forum.

Ordering details for DIY PCBs and parts can be found by clicking here.

The Oakley range of Eurorack PCBs are being discontinued. Boards will continue to be sold while stocks last. I wish to thank all my customers over the years for their support.

The Modules


Eight stage analogue sequencer Two channel sequencer with skip, reset and multistage parallel loading


Dual VCO Two classic sawtooth core oscillators in 14HP


COTA Multimode voltage controlled filter based on the classic cascaded integrator design
Croglin An unusual dual filter module with a complex sound in a compact package
Discrete Ladder Filter Transistor ladder filter and distortion circuit based on the classic designs from the 1960s
Human Voice Module A fixed filter bank designed specifically to recreate the famous vocal sounds from a well known keyboard
Journeyman Diode ring dual mode filter based on the distinctive Traveller filter from the 1970s
MOSPhaser Voltage controlled six stage MOSFET phaser
SVF Multimode voltage controlled state variable filter

Utility Modules

Multimix Versatile three way mixer for CV and audio

Envelope Generators

Envelope An excellent ADSR module with looping feature

Power Distribution

Euro Dizzy Power distribution board for eurorack

Recently Discontinued Projects

Classic VCA Vintage voltage controlled amplifier based on the discrete circuitry of the 2600
Euro Power Supply Power supply module for small to medium sized eurorack systems

Useful Information

Construction Guide My handy PDF guide to building Oakley DIY projects
Parts Guide My handy PDF guide to buying parts for Oakley DIY projects
5U Modular Projects Our popular range of MOTM and MU compatible synthesiser modules

Legacy Support

Legacy Support Page A growing collection of older User Guides, User Manuals and Builder's Guides

Back to the start page

Copyright: Tony Allgood.
Last revised: January 02, 2024.