My designs are indicated with a superscript¹
Modifications of existing designs are indicated with a superscript²
|AMF 775-A Educational (Analog) Computer New||CVS eight channel module¹|
|M.E.M.S. Project Buchla modules New||CVS 2x16 LCD display¹|
|Buchla 248 MARF V2 HW & SW Mods2||CVS four channel module (PSIM software compatible)¹|
|Blomman BLM 277 Signal Delay Unit||CVS Kurzweil ribbon controller¹|
|DJB-005 Voltage Monitor¹||Synthmodules.com PSIM and SpeakJet²|
|Behringer Model D rack mount²||CVS and PSIM I/O expansion module¹|
|Thomas Maximus VCO||CVS and PSIM Programs¹|
|Thomas Henry SN-Voice||Arduino-based ComputerVoltageSource¹|
|Buchla format 24 dB VCF and Clock²|
|5U Chaotica||Synthesizer Restoration and Builds|
|5U Benjolin²||Aries modules|
|Jürgen Haible "solina" triple chorus||Buchla modules Photos|
|Ian Fritz DoubleDeka VCO²||Fonitronik mh21 Triple Resonator|
|5U E950 Circuit Bent VCO||Loft 450 Delay Line/Flanger|
|CGS-35 Steiner VCF²||M.E.M.S. Project Buchla modules New|
|Thomas Henry mega percussive synthesizer||Milton Sequencer|
|5U E560 deflector shield||Moog Micromoog|
|Barton dual quantizer²||Moog modules Photos|
|DJB-021 pan-crossfade²||Moog Sonic Six synthesizer|
|5U Buchla 266 source of uncertainty²||Moog Source|
|Polivoks VCF²||Oberheim Mini-Sequencer (MU repackage)|
|5U E580 sampling mini-delay||Oberheim SEM|
|Ian Fritz 'threeler' 3rd order VCF²||PAiA 2720 Synthesizer|
|DJB-020 tap tempo LFO¹||PAiA 4700 Synthesizer Modules|
|Synthesizer XY laser²||Papareil Labs Quantix-8²|
|5U Buchla pulser-crossfader-timbre generator²||Roland System 100 - 140 module|
|5U E340 cloud generator²||SCI Model 700 Programmer|
|5U E350 morphing terrarium²||SCI Model 800 Sequencers|
|Modular Synthesizer Information||Serge System|
|Module listing by cabinet||Serge Wilson Analog Delay (Frac format)|
|Custom modules design files and photos¹||Synton 3000 series modules|
|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|
|Tektronix 760A Stereo Audio Monitor||Photo album|
|Video and Sound samples|
|Reference Information||Hammond M-3 tonewheel generator|
|Modular synth tips||My visit with the Raymond Scott Electronium|
|Parts and DIY information|
|Making PCB brackets||Organs and more|
|Module Conversions||Hammond B-3 and Leslie 142|
|440 Hz sine wave reference oscillator¹||Hammond M-3 tonewheel generator Photos|
|Power supply sequencing¹||Hammond vibrato scanner module²|
|PT2395 delay module²||Hammond zinc whiskers Photos|
|Vactrol measurements||Organs, keyboards and amplifiers|
|Related Musical Projects||Electronics Projects and Repairs|
|Circle machine sequencer¹||AMF 775-A Educational (Analog) Computer New|
|MIDI 88 note keyboard²||Bell Sound Systems RT-205 & BT-205IB|
|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 127 modules including Analog Metropolis, Barton Musical Circuits, Blacet, Bridechamber, Catgirl Synth, ElectricMusicStore, Encore, 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.
|Side synthesizer modules index||Reference|
|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||
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|