5U Projects
Voltage Controlled Low Frequency Oscillator
The suggested layout of the VC-LFO module in a 1U wide panel. This is a versatile yet easy to use voltage controlled low frequency oscillator module that can also be used as an audio…
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Dual-LFO
The Oakley Dual-LFO is a single width 5U high module that features two highly useful low frequency oscillators. This is an updated version of the low frequency oscillator from a classic Japanese vintage analogue…
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Slim VCO
The suggested panel designs for the SVCO-A (left) and SVCO-B (right) single width voltage controlled oscillators. Two compact well specified audio VCOs for MOTM and MU based modular synthesisers. The 'A' variant has a…
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The ‘One-of-three’ VCO
An excellent sounding and popular VCO (voltage controlled oscillator) module. The design was originally inspired by the classic sound of the Mini's VCOs with the central core of the oscillator being somewhat similar. However,…
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VCO Controller
1U wide suggested panel layout for those with Oakley CV/gate Bus fitted. Those without CV/gate bussing can simply use a different socket choice - perhaps foregoing the VCA CV OUT and SQR OUT for…
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The Transistor Superladder Variable Slope VCF
This is the 1U wide 'Filter Core' version of the Transistor Superladder. One would use this module in conjunction with external mixers for maximum control. The Transistor Superladder or TSL is a voltage controlled…
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Croglin – Voltage Controlled Dual Low Pass Filter
The panel design for the 1U wide 'filter-core' Croglin. The Oakley Croglin Voltage Controlled Filter is based around two unusual and quirky low pass filter circuits that operate either together or against each other.…
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HVM – Human Voice Module
The suggested panel design for the single width 1U wide MOTM format module. The Oakley Sound HVM is an all analogue audio signal modification device that replicates some of the sounds made from a…
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The Discrete Ladder Filter Module
The suggested panel design for the Filter Core 1U wide module. The Oakley discrete ladder filter (DLF) is my reworking of the classic 1960's low pass filter module using the circuits from the 904A…
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The Oakley Diode Superladder Variable Slope VCF
This is the 1U wide 'Filter Core' version of the Diode SuperLadder. One would normally use this module in conjunction with external mixers for maximum control. This latest version of the classic Oakley Superladder…
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Voltage Controlled State Variable Filter
The SVF in our 1U 'filter core' format. This is a two pole multimode filter capable of high pass, low pass, band pass and notch output modes. All four outputs are available simultaneously. This…
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The Journeyman Voltage Controlled Filter Module
The 1U format 'filter core' Journeyman filter. This offers the basic filter module without the extra CV and audio mixing that the full width 2U module provides. The completely unlinear response and discrete circuitry…
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The Voltage Controlled ADSR and VCA module
The suggested panel design for the 2U wide complete VC-ADSR module This is a dual purpose module in a 2U width panel. Not only does it feature a four stage envelope looping generator with…
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VRG – Versatile Ramp Generator
The Oakley Versatile Ramp Generator (VRG) is a single width 5U high module that can function as a voltage controlled variable symmetry oscillator, a traditional attack-decay envelope generator, a one shot transient generator with…
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Looping ADSR with integral VCA
This is a very popular dual purpose module. Not only does it feature a looping four stage envelope generator, but it also has a high quality VCA onboard. Two outputs are provided, one, labelled…
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The Oakley FourMix
A simple but effective four channel mixer for use with control voltages and audio. Each channel has an independent level control that goes from fully off to unity gain. Two outputs are provided. OUT…
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The Oakley Multimix
The suggested panel design for the MOTM format Multimix. A highly useful utility module. It's a four channel mixer with a twist. The first three inputs have each an independant level control. Each level…
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The Noise and Dual Filter module
The issue 4 Noise/Filter front panel The Oakley Noise and Dual Filter module is used to generate non pitched sounds such as wind, surf and other ethereal sounds. It can also be used as…
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The Oakley Router
The Oakley Router is a simple but useful module. The top section is two passive multiples. A multiple, or 'mult', is a number of sockets, in this case four, that are connected together in…
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Sample/Slew Generator
This compact single width module features a powerful sample and hold module with controllable correlation, a slew generator, a wide range clock oscillator and a dual output noise generator. It can be used to…
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The Envelope Follower and Gate Extractor (EFG)
The double width EFG-Deluxe (left) and the single width EFG (right) - both shown in the suggested standard finish MOTM format. An envelope follower takes an audio input and converts it into a control…
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MOSPhaser: Voltage Controlled Phaser Module
The Oakley Sound MOSPhaser is a six stage phaser (five variable all pass filters and one fixed all pass filter) that generates a classic sound. Partly based on a well loved 1970s guitar effects…
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Discontinuity: Analogue Synthesizer Waveshaper, Wavesplicer and Wavefolder
Discontinuity - Waveshaper, Wavefolder, Clipper, Ring Modulator & Wavesplicer The Discontinuity is the updated version of an older Oakley module called the Wavefolder. It is a voltage controlled waveshaper module designed primarily for use…
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Flanger/Chorus
The Oakley Flanger & Chorus module is an analogue delay line capable of delaying audio signals from 0.5mS to 15mS. In conjunction with an external LFO module this unit can be used to produce…
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Equinoxe: Voltage Controlled Phaser Module
This is our hugely popular version of the classic four stage OTA based phaser. Wonderfully lush and smooth, it is similar in sound to the phaser used by Jean Michel Jarre on the Oxygene…
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Deep Equinoxe: Voltage Controlled Eight Stage Phaser Module
There are two suggested front panel designs. The one on the left is the original two switch variant, while the one on the right uses a single three position switch. This is an upgrade…
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Oakley Modular Synthesiser: Overdrive, Distortion and Harmonic Multiplier Module
Overdrive-II: Analogue Overdrive, Distortion and HarmonicMultiplier Module The Oakley Overdrive-II features two different waveform modifiers to produce a wide range of overdriven and distortion sounds. The first waveform modifier is a classic overdrive circuit…
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PSU2 – Power Supply Unit for DIY Synthesiser Systems
Constructional difficulty: Moderate if using a low voltage AC output mains adapter. A completed issue PSU2 board. This one is powered from an internal mains transformer so has the switch terminals linked out. The…
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Dizzy: Power Distribution board
The issue 4 Dizzy board. 1/4" (6.35mm) Faston blade terminals provide for easy and reliable connections to the master power supply. This is a MOTM/Oakley power distribution board supporting twelve 4-way 0.156" (3.96mm) MTA/Molex…
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MU Dizzy: Power Distribution board for MU modular systems
A completed MU Dizzy module with integral 5V regulator. The regulator IC has been mounted onto the metal panel to allow currents up to 250mA to be taken from the +5V rail. This is…
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The midiDAC Single Channel midi-CV Convertor
The midiDAC is a well specified single channel midi to analogue convertor. This project is a joint development between Oakley Sound and Trevor Page. The 5U high 2U wide panel layout for the MOTM…
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- Deep Equinoxe: Voltage Controlled Eight Stage Phaser Module
- Discontinuity: Analogue Synthesizer Waveshaper, Wavesplicer and Wavefolder
- Equinoxe: Voltage Controlled Phaser Module
- Flanger/Chorus
- MOSPhaser: Voltage Controlled Phaser Module
- Oakley Modular Synthesiser: Overdrive, Distortion and Harmonic Multiplier Module
Envelopes
Filters
- Croglin – Voltage Controlled Dual Low Pass Filter
- HVM – Human Voice Module
- The Discrete Ladder Filter Module
- The Journeyman Voltage Controlled Filter Module
- The Oakley Diode Superladder Variable Slope VCF
- The Transistor Superladder Variable Slope VCF
- Voltage Controlled State Variable Filter
Obsolete
Oscillators
Power Supplies
- Dizzy: Power Distribution board
- MU Dizzy: Power Distribution board for MU modular systems
- PSU2 – Power Supply Unit for DIY Synthesiser Systems
Utility Modules
A Focus on Analogue Excellence
Oakley 5U projects emphasize:
- Discrete analogue circuitry
- Exceptionally stable voltage-controlled oscillators (VCOs)
- Musically voiced, character-rich filters
- Clean, low-noise signal paths
- Spacious, performance-oriented panel layouts
Each module is designed with careful attention to tracking accuracy, thermal stability, and long-term reliability—making them ideal for professional studio environments and live performance systems.
Core 5U Project
Voltage Controlled Oscillators (VCOs)
Oakley 5U VCO designs are known for outstanding 1V/oct tracking accuracy, wide frequency range stability, and a rich, authoritative analogue tone. Builders value their precise calibration and dependable performance in large-format systems.
Filters & Tone Shaping
From ladder-inspired classics to flexible state-variable designs, Oakley 5U filters deliver warmth, clarity, and expressive resonance. These circuits combine vintage-inspired character with modern refinement and stability.
Utilities & Modulation
Oakley 5U systems include essential building blocks such as:
- VCAs
- Envelope generators
- LFOs
- Mixers
- Power regulation modules
These modules are engineered to integrate seamlessly into complex 5U modular systems, offering clean signal handling and intuitive control spacing.
Why Choose Oakley 5U Projects?
- Proven analogue circuit designs
- Exceptional build documentation
- Boutique-level sound quality
- Strong DIY community support
- Long-term serviceability
For modular enthusiasts who appreciate the physical presence, precision, and sonic depth of large-format systems, Oakley 5U projects offer a powerful combination of vintage analogue heritage and modern engineering stability.
Oakley Modular Overdrive II MOTM
Oakley Overdrive II IMPORTANT: The synthcube kit is complete EXCEPT it does not include the PCBs- these have to be ordered…
$30.00
Oakley Modular VC LFO MOTM
Oakley VC LFO MOTM format, 1U kits are available in the v2 issue pcb, and the v3 issue pcb …
$35.00
Oakley Modular MIDI DAC MOTM
oakley midi dac, 2U wide MOTM format The synthCube kits for the MIDI-DAC do NOT include PCBs or PICs— These are no…
$40.00
Oakley Modular VCO MOTM
An excellent sounding and popular VCO (voltage controlled oscillator) module. The design was originally inspired by the classic sound of the…
$40.00
Oakley Modular State Variable VCF (SVCF) MOTM
oakley modular state variable vcf This is a two pole multimode filter capable of high pass, low pass, band pass and…
$35.00
Oakley Modular Croglin Voltage Controlled Dual LPF MOTM
Oakley Croglin Voltage Controlled Dual LPF Full kit includes everything necessary to build the module, including the MOTM panel, main…
$35.00
Oakley Modular COTA VCF MOTM
Oakley COTA VCF Controlled 'cascaded OTA' filter The full DIY synth kit includes everything you need to build the module-…
$35.00
Oakley Modular Diode Superladder Variable Slope VCF MOTM
Oakley Diode Superladder Variable Slope VCF full kit includes everything you need to build the module including the panel, main…
$35.00
Oakley Modular Journeyman2 VCF MOTM
Oakley Journeyman2 VCF The Oakley Journeyman2 VCF DIY kit includes everything you need to build the module- panel, pcb, sock4 jack…
$35.00
Oakley Modular Classic VCA v1.1 MOTM
Oakley Classic VCA, MOTM 1U PCB Issue 1.1 PCB Set includes the v1.1 PCB and the SOCK6 PCB (PCBs no longer…
$30.00
Oakley Modular Discontinuity MOTM
NEW LOWER PRICES FOR 2026 Oakley Discontinuity Shaper, MOTM, 2U Full kit includes everything you need-- 3 PCB set, 2U MOTM panel,…
$15.00
Oakley Modular Sample & Hold w/Slew Limiter MOTM
oakley sample & hold w/slew limiter MOTM format full kit includes everything you need to build the module This compact…
$35.00
Oakley Modular Equinoxe (VC Phaser) MOTM
Oakley Equinoxe (VC Phaser) MOTM 1U panel Note: this panel version uses the label VC PHASER rather than EQUINOXE as shown…
$21.00
Oakley Modular Discrete Ladder Filter MOTM
Oakley Discrete Ladder Filter MOTM MOTM 2U panel “The Oakley discrete ladder filter (DLF) is my reworking of the classic 1960's…
$30.00
Oakley Modular VCO Controller MOTM
Oakley VCO Controller Issue 1 PCB + SOCK8 PCB As of 2026 synthCube will begin supporting and distributing Oakley Modular projects. As…
$15.00