My designs are indicated with a superscript¹
Modifications of existing designs are indicated with a superscript²
|Buchla format 24 dB VCF and Clock² New||CVS eight channel module¹|
|5U Chaotica||CVS 2x16 LCD display¹|
|5U Benjolin²||CVS four channel module (PSIM software compatible)¹|
|Jürgen Haible "solina" triple chorus||CVS Kurzweil ribbon controller¹|
|Ian Fritz DoubleDeka VCO²||Synthmodules.com PSIM and SpeakJet²|
|5U E950 Circuit Bent VCO||CVS and PSIM I/O expansion module¹|
|CGS-35 Steiner VCF²||CVS and PSIM Programs¹|
|Moon Modular M569 companion¹||Arduino-based ComputerVoltageSource¹|
|Thomas Henry mega percussive synthesizer|
|5U E560 deflector shield||Synthesizer Restoration and Builds|
|Barton dual quantizer²||Aries modules|
|DJB-021 pan-crossfade²||Buchla modules Photos|
|5U Buchla 266 source of uncertainty²||Fonitronik mh21 Triple Resonator|
|Polivoks VCF²||Loft 450 Delay Line/Flanger|
|5U E580 sampling mini-delay||Milton Sequencer|
|Ian Fritz 'threeler' 3rd order VCF²||Moog Micromoog|
|DJB-020 tap tempo LFO¹||Moog modules Photos|
|Synthesizer XY laser²||Moog Sonic Six synthesizer|
|Buchla pulser-crossfader-timbre generator²||Moog Source|
|5U E340 cloud generator²||Oberheim Mini-Sequencer (MU repackage) New|
|5U E350 morphing terrarium²||Oberheim SEM|
|Magic Smoke TH-301 VC-LFO²||PAiA 2720 Synthesizer|
|Bridechamber wogglebug²||PAiA 4700 Synthesizer Modules|
|LCD oscilloscope module²||Papareil Labs Quantix-8²|
|Roland System 100 - 140 module|
|Modular Synthesizer Information||SCI Model 700 Programmer|
|Module listing by cabinet||SCI Model 800 Sequencers|
|Custom modules design files and photos¹||Serge Modular|
|Purchased modules and modifications²||WASP synthesizer|
|Dotcom modules||YUSynth Dotcom Mini-Moog VCF|
|Main cabinets & power distribution¹|
|Side cabinets & power distribution¹||Photos, Videos, and Sound Samples|
|Reference Information||Video and Sound samples|
|Modular synth tips||Hammond M-3 tonewheel generator|
|Parts and DIY information||Hammond zinc whiskers|
|Making PCB brackets|
|440 Hz sine wave reference oscillator¹ Part for sale||Organs and more|
|Power supply sequencing¹||Hammond B-3 and Leslie 142|
|PT2395 delay module²||Hammond M-3 tonewheel generator Photos|
|Vactrol measurements||Hammond vibrato scanner module²|
|Hammond zinc whiskers Photos|
|Related Musical Projects||Organs, keyboards and amplifiers|
|Circle machine sequencer¹|
|MIDI 88 note keyboard²||Electronics Projects and Repairs|
|MIDI bass pedals¹||Electronic project information|
|MIDI processor¹||Electronic repairs and tips information|
|SpeakJet speech synthesizer²||Fender Tremolux Restoration|
|Yamaha Tenori-On||Sony TA-E88 Restoration|
My modular synthesizer now consists of 120 modules including Analog Metropolis, Barton Musical Circuits, Blacet, Bridechamber, Catgirl Synth, Encore, Roman Fillipov, Flight Of Harmony, Ian Fritz, Jürgen Haible, Rob Hordijk, Larry Hendry, Magic Smoke Electronics, Moon Modular, MOTM, Natural Rhythm Music, Neil Johnson, Oakley Sound Systems, Synthcube, Synthesizers.com, Synthmodules.com, YUSynth, and about two dozen of my own designs.
|Design files and photos for my custom modules¹||Design|
|Information, mods, and photos for purchased modules²||Design|
|Parts and construction information||Reference|
|MP3 samples of some of my favorite patches||Sounds|
Here is a painting of my modular synthesizer that my son gave me.
Modular CV Keyboard
I rebuilt an ARP-3604 keyboard with a wood cabinet and updated electronics.
Modular Cabinets and Power Distribution
I built a 19" rack cabinet (30 modules and 2U standard rack) and a four stack of wood cabinet (96U). I later replaced the 19" rack cabinet with a four stack wood side cabinet (36U+10MU).
|Info & photos of my initial 19 inch rack cabinet¹||Reference|
|Info & photos for my power-on delay¹||Design|
|Info & photos for my rear AC mains module¹||Design|
I designed the ComputerVoltageSource module
using an AtomPro28. Features include:
8 analog inputs (0 to 10 volt with 0 to -5 volt offset at 10 bit resolution)
8 analog outputs (0 to 10 volt at 12 bit resolution)
3 digital inputs
MIDI in / out
I2C expansion (for additional inputs and outputs)
2x16 LCD display.
|Info and photos for the ComputerVoltageSource display¹||Design|
|Information and photos for a four channel version¹||Design|
|Information and photos for a dedicated ribbon controller¹||
|Arduino-based ComputerVoltageSource¹ New||
Synth Display Modules
I built an external display using a 2x20 LCD module with MIDI or serial input and three display modes.
I built two dedicated displays for my programmable PSIM (2x8 LCD) and ComputerVoltageSource (2x16 LCD) modules.
|Info and photos for the ComputerVoltageSource display¹||Reference|
MIDI Bass Pedals
I built a set of MIDI bass pedals using Hammond
organ pedals and an AtomPro24 controller. Features
Normal, Mono, and 'Sticky" modes (sticky=note held until next note played)
Normal, One-Shot, and 'Sticky" arpeggiator modes
5 built-in arpeggiator sequences and a user-recordable 100 note sequence
Normal, -1 and +1 octave select
MIDI in merge
Internal or MIDI clock
External LCD note display
88 Key MIDI Keyboard
I built an 88 key MIDI keyboard from a salvaged Kurzweil Ensemble Grand Mark III digital piano. I used the original keyboard controller and built a custom wood cabinet.
I built a MIDI processor which is self-powered and provides multiple transformations.
Specific continuous controller transforms
A440 Reference Oscillator
I designed a 440 Hz sine wave reference oscillator using only two 8 pin DIP components.
Hammond Vibrato Scanner Module
I built an external electro-mechanical vibrato and chorus using a Hammond Organ scanner and delay line. A small DC motor and speed controller varies the vibrato frequency.
I built the AVR Synth PCB to have a small format synthesizer but never completed this project.
Synth Controlled Laser Light Module
My first laser was a modified Ramsey Electronics laser light (LLS1) with CV control of the motor speed. I built an AVR plug-in that replaces the 555 timers to interface to my synth 5 volt CV levels. Later I built a full X-Y laser for synthesizer CV control.
PAiA Fatman Mods
My son has a PAiA Fatman and we enhanced it with a number of modifications. Some of the modifications were from various sites on the internet and some I designed. I consolidated all the modifications into a single document. Modifications include hard sync, lower frequency range, separate VCO attenuators, sub-octave generators and attenuators, ring modulator and attenuator, LFO filter modulator, and separate VCO tuner output.
Organs, Keyboards, and Amplifiers
I have information and photos of my various keyboards, amplifiers, Hammond organs, and Leslie speakers.
|Keyboard and organ studio layout||Reference|
Electronic Projects and Restorations
This is my non-synthesizer electronic projects page. I have information and photos of two 70's stereos, projects such as an FM transmitter and scrolling display, and various repair and restoration information for amplifiers, speakers, and turntables.
|Info and photos for my electronic restorations and repairs||Reference|