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My designs are indicated with a superscript¹
Modifications of existing designs are indicated with a superscript²
Synthesizer Projects |
5U Modular Synthesizer
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.
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5U 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.
5U Modular CV Keyboard
I rebuilt an ARP-3604 keyboard with a wood cabinet and updated electronics.
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5U 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 5U rack cabinet¹ | Reference | |
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Info & photos for 5U power-on delay¹ | Design | |
Info & photos for 5U rear AC mains module¹ | Design |
4U 200 Series Format Modular Synthesizer
I built a small cabinet for my initial 200 series modules. Much like my 5U system, it grew significantly so I built this 36U slant cabinet
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36U 200 Series slant cabinet¹ | Reference |
5U ComputerVoltageSource Module
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.
Synth Display Modules
I built an external display using a 2x20 LCD module with MIDI or serial input and three display modes.
Design |
I built two dedicated displays for my programmable PSIM (2x8 LCD) and ComputerVoltageSource (2x16 LCD) modules.
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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
include:
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
Design |
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.
Reference |
MIDI Processor
I built a MIDI processor which is self-powered and provides multiple transformations.
Features include:
Key transpose
Channel transpose
Keyboard split
Keyboard reverse
Specific continuous controller transforms
Design |
A440 Reference Oscillator
I designed a 440 Hz sine wave reference oscillator using only two 8 pin DIP components.
Design |
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.
Design |
AVR Synth
I built the AVR Synth PCB to have a small format synthesizer but never completed this project.
Reference |
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.
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Synthesizer Laser² | Design |
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.
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Organs, Keyboards, and Amplifiers |
I have information and photos of my various keyboards, amplifiers, Hammond organs, and Leslie speakers.
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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.
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Info and photos for my electronic restorations and repairs | Reference |