This page provides practical data and tips relating to Synovatron products.

Please feel free to ask questions or make suggestions for support info in the comments section at the bottom of this page; let me know what you need!!

Support information on this page
  • Downloadable document links
  • Front panel design and module placement
  • DIY1 and DIY2 prototype board layouts
  • Ribbon cable info 
  • Wiring hints and tips 

Downloadable PDF Documents.

User manuals, data packs and fitting instructions have now been rehosted onto Google Docs where they can be viewed or downloaded. The links are shown below, they may get updated with new revisions, additions from time to time so please check back here for the latest info. If you experience any problems with file downloads or need further information please email for assistance at

Euro Module User Manuals

CV Tools: User Manual Rev 1.5 Oct 2011 
Cascade Polarising Mixer/Attenuator/Slew

CVGT1: User Manual Rev 1.3 Nov 2014 
Euro to Buchla CV/Gate/Trigger/Pulse Translator












ModuleModule User Manual

cvgtMM: User Manual Rev 0 Feb 2014 
Buchla to Euro/serge CV/Gate/Trigger/Pulse Translator 


cvgtElements Data Packs

GTPulse: Data Pack Rev 1.1 June 2015 *UPDATED*
Gate/Trigger to Buchla Pulse Translator

CV1.2: Data Pack Rev 0 June 2015 *NEW*
Euro 1V/octave CV to Buchla 1.2V/octave CV Translator 








Analogue Systems to Doepfer (Euro) Adaptors Instructions

ASM2DB Adaptor:
Fitting Instructions
Analogue Systems Module to Doepfer Bus Adaptor

uZeus Tech Note
If using an ASM2DB Adaptor on a uZeus ribbon cable bus then read this to avoid damaging a module - DO NOT line up the red stripes

DM2ASB Adaptor: Fitting Instructions Rev 2 Oct 2012 
Doepfer Module to Analogue Systems Bus Adaptor fitting instructions

5ASM2DB Adaptor/Expander: PCB/Kit Data Sheet & Fitting Instructions Rev 0.1 2014 
5 channel Analogue Systems Module to Doepfer Bus Adaptor Board fitting instructions and bare board info for DIYers



STEMCELL Module Kit Details and Project Instructions



STEMCELL 4HP Multi-option DIY Kit: STEMCELL basic kit Overview Rev 0 May 2014
Overview of the basic STEMCELL kit showing PCB layout and schematic.

STEMCELL 4HP Multi-option DIY Kit: STEMCELL kit Passive Multiples Project Rev 0 May 2014
Project description and assembly details for four possible Passive Multiples projects using just the STEMCELL basic kit.

STEMCELL 4HP Multi-option DIY Kit: STEMCELL kit Diode (Gate/Trigger) Combiner Project Rev 0 May 2014
Project description and assembly details for a Diode Combiner project using the STEMCELL basic kit and just a few components.

STEMCELL 4HP Multi-option DIY Kit: STEMCELL kit Trunk-Lines Project Rev 0 May 2014
Project description and assembly details for a Trunk-Lines project using two or more STEMCELL basic kits, a few connectors and some ribbon cable.

Front panel design and module placement.
Two panel configurations that can accomodate DIY kits
Tone's top tip: When mounting DIY2 closely on the left of DIY1 (i.e. 20mm hole centres) crop the centre (wiper) pins of the pots close to the PCB - there is a very small clearance but this will ensure they don't touch or short out on the jack sockets; If you fit DPDT switches in place of any jacks then you must crop the the pots as described as the switches are taller than the jacks.

DIY Prototype Board Layouts.

The following diagrams show the connectivity of standard components such as pots and jacks, the tracking to show which pads are connected and some ideas for mounting LEDS and switches. The fainter images are useful for planning your component layout. If you want higher res images please request them on this e-mail link.

Ribbon Cable Info.

Wiring Hints and Tips

Kynar wire is my recommendation for wiring the DIY boards. It's a very thin single strand wire made of a 0·25 mm diameter (30 a.w.g.) silver-plated copper solid conductor with Kynar™ insulation. The overall diameter is 0·5 mm; it's easy to strip, even with low-cost strippers, and it resists run-back when soldering.

I've tried 1/0.6 equipment wire (e.g. Rapid 01-0315) but it is a bit too thick and the insulation runs back when soldered which could lead to inadvertant shorts.  It is usable with care but it is not recommended.

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