DIY Synth Voice

When developing Erica Black Series and Pico Series modules, we accumulated quite a know-how on compact and great sounding designs, and we decided to share some of those with DIY community. And therefore Erica Synths proudly presents – DIY Synth Voice module!

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DIY Polivoks modules bundle

OUT OF STOCK! New version is coming!

Special offer for those, who always wanted full Polivoks in their eurorack! Full line of Erica Synths Polivoks modules @ 20% discount! Bundle includes: Modulator, 2xVCO, Mixer, VCF, VCA and 2xADSR. Polivoks modules with our MIDI-CV interface fits exactly in 84HP rack.

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DIY Wogglebug

Grant Ritcher's DIY Wogglebug for eurorack standard! Great random modulation, clock and sound source.

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DIY Polivoks VCO kit

Erica Synths DIY Polivoks Voltage Controlled Oscillator uses the core of the original Polivoks VCO, but has plenty of modifications to adjust its performance to modular synth standards. Also DIYers can make their own modifications described in the Build manual. DIY kit, as all Erica Synths Polivoks modules, comes with a set of the original Russian ICs and transistors in three options: PCB (2 layers, 95x97mm) + rare parts (including copper sheet to make RFI/light shield for transistors :) ), PCB + rare parts + panel and full kit with all parts included to build this exciting module. Polivoks had two slightly different VCOs, therefore we made a PCB that is configurable to build both VCOs. WHEN ORDERING ONE VCO WITH A PANEL, AT THE CHECKOUT SPECIFY IN THE COMMENT, WHICH PANEL YOU ARE INTERESTED IN! VCO1 - with X-Mod option, VCO2 - with detune option.

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DIY Syncable VCO

Polivoks inspired VCO with sync input and perfect tracking over 8 octaves.

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DIY Polivoks VCA kit

The Polivoks VCA has distinctive architecture – two differential opamp based VCAs in series each for LFO and ADSR control signal amplitude independently. Control voltage to attenuation behavior of this VCA is nonlinear and not logarithmic, it is kept authentic to the response of ПОЛИВОКС. As most Erica Synths DIY kits, Polivoks VCA kit as standard includes esoteric parts - it appeared that the world has run out of differential opamp ICs K118UD1A(B), but we developed an exact clone of that IC! All parts to make K118UD1 clone are included in the kit. Below find downloadable assemby manual!

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DIY Polivoks VCF kit

The most authentic sounding Polivoks VCF emulation available as DIY kit in three options - PCB+ICs, PCB+ICs+panel, full kit with all parts. The original Russian ICs K140UD12 are used in the sound circuit. Eurorack standard front panel. Updated version V2.0 is available!

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DIY Dtech VCF (assembled)

Skiff format Dtech VCF sound circuit uses the original Russian ICs K140UD12 found in Polivoks VCF, and has one of most advanced control features found in VCFs around, including resonance CV, filter curve and resonance slope adjustment and unique CV assign function. It's sound ranges from deep, bassy sounds to something even more extreme than famous Polivoks resonant screams.

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Knobs for Alpha potentiometers

As we started to develop skiff format modules (Dtech VCF and Polivoks(ish) VCO), we realized. we need knobs that fit Alpha potentiometers with imperial shaft. So we decided to make them available!

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DIY Polivoks(ish) ADSR EG kit

OUT OF STOCK! New version is comming!

Erica Synths Polivoks(ish) ADSR envelope generator is designed from the scratch to mimic Polivoks envelope generator behavior, but it is 100% analogue, it has much wider setting range, greater stability and has unique, unseen before technical solutions. It's cost-effective, can be configured to use with active high (typical eurorack) or active low (Korg)gate and trigger, has AR looping feature with re-trigger option, compact design - everything one can expect from an envelope generator in a modular synth.

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DIY Polivoks Modulator kit

DIY Polivoks MODULATOR clone kit to build a eurorack module. Erica Synths MODULATOR emulates original Polivoks modulator behavior, and has added feature - adjustable amplitude inverted signal output. Kit is available in three options and contains PCB, 8HP black aluminum panel and set of 4 Russian transistors including selected transistor for noise generator and FET transistor for S&H, as well as full kit with all parts needed. To complete the module you will need to source some widely available components - check the BOM!

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Voltage controlled filter AS3320

The AS3320 is a high performance voltage controlled four-pole filter with on-chip voltage controllable resonance IC.

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PNP matched transistors

PNP matched transistors in DIP8 case!

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DIY Mixer kit

Those, who intend to build 2 Polivoks VCOs and already have or will build a Modulator, will need an audio mixer! Therefore Erica Synths introduces simple, cost effective DIY mixer kit! As standard it has 3 AC coupled, but you can add as many inputs you wish. The mixer is built on generally available parts.

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NPN matched transistors in DIP8 case

Famous LM394 matched transistors analogue made in Latvia. NB! transistor configuration is the same, but pins are shifted up - please refer to pdf manual below!

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DIY Mixer/Splitter kit

Audio/CV mixer and buffered audio/CV/clock splitter - extremely useful and easy to build utility module for complex patches. Mix audio or CV signals, split master clock and use it to clock several modules simultaneously, split one CV to control several modules without risk of interference, split audio signal and lead it to several filters simultaneously - your imagination is the limit!

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AS394 matched transistors

Freshly made in Latvia matched transistor pair, equivalet to LM394! Gold plated pins and metal can TO-5 case!

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Eurorack bipolar 12V PSU kit

Erica Synths 12V bipolar 1,5A PSU hardware kit is arranged to build slim, eurorack standard PSU easy to install in any modular system. Hardware kit contains PCB and all unconventional parts that are expensive to source alone - heat sinks, spacers, lugs, fuse holder, etc. Full kit contains all parts needed to complete the PSU. NB! Installation of this module require skills to work with high voltages! It's at your own risk!

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