The 16n AtoVproject Rework is aimed a solving a problem very specific to modular synthesis. As a patch is getting more and more complex a forest of cables has grown over your system before you know it. This module allows you to take the control from the modular into a very ergonomic controller that integrates perfectly into a modern studio.

The 16n AtoVproject Rework is a controller sending CV, I2C, MIDI jack, USB MIDI (compatible PC, Mac, iPad etc...), making it the absolute ultimate controller for any of your hardware and software all in one!

Even better this controller can either can either be used as a Eurorack module or as a standalone unit using the beautiful aluminum enclosure. In 2019, the Berlin Modular community showed interest into building the 16n Faderbank. As one of the Berlin Modular community organizers, I decided to make a redesign of the 16n faderbank following the suggestions and desires of our members. The 16n AtoVproject Rework is the result.

This unit features :

• 16 high high end Alps faders

• Eurorack compatible and standalone enclosure (for use in or out of the rack)

• Selectable 0-5V or 0-10V CV output range (independent setting for each faders)

• High stability power conditioning for high stability analog inputs.

• Addition of utility connector on the back of the unit to simplify the use of i2c with modules like the ER301

This version of the 16n Faderbank ships with:

• AtoVproject 16n Rework Eurorack module

• Enclosure for standalone use (Alumunium Powder coated)

• USB cable (High quality 1,5m braided and shielded)

• MIDI din to Jack adapter (90° angled, Type A)

• Eurorack Power Cable

The 16n AtoVproject rework is a complete redesign of the original open source (CC-BY-SA) project 16n faderbank. This project was originated by Brian Crabtree, Sean Hellfritsch, Tom Armitage, Brendon Cassidy. As wished by the original designers the 16n AtoVproject rework is also open source and uses the same CC-BY-SA licence.

This is a Do-It-Yourself kit, not an assembled module. Building instructions can be found here.

DIY level: medium

Eowave's Weather Drones is an all in one drone voice for eurorack modular. The Weather Drones can be self patched, or used with other eurorack modules via CV and trig inputs. Check out this video. The architecture of the module is as follows, some of which is pre-patched:

• Digital tri wave oscillator, controls are freq, spread (adds more triangle waveforms, up to 8), character (wave folder), fm in with attenuator

• LFO with square and tri wave out

• Filter with cutoff and feedback, mod input with attenuator and second mod input without

• AD envelope with level attenuator

• Random sample and hold noise (driven by square wave LFO) with slew

• VCA

Technical details:
• 100mA +12V, 10mA -12V

• 24HP, 38mm deep

This is a Do-It-Yourself kit, not an assembled module. Building instructions can be found here.

DIY level: medium

Robaux LL8 is a tiny eight-track trigger sequencer for your eurorack. The little brother of the Sweet 16 got some skills!

Program your patterns like on a classic TR machine. Record patterns with your fingertips. Create random patterns at the touch of a button. Turn your patterns into exciting performances with the mute and fill function. The Little Eight has 16 patterns with up to 16 steps. Create longer rhythms by chaining multiple patterns. The LL8 synchronizes to an incoming clock source and resets automatically if the signal is interrupted for a few seconds. Here you'll find a video.

Features:

• Number of Tracks: 8

• Number of Steps per Track: up to 16

• Number of Patterns: 16 (chainable)

• 1 x Clock In

• 8 x Trigger Out

• 1 x MIDI Out (adapter required)

Technical details:
• 10HP, 2.5 cm deep
• Current draw: +12V: 20mA

This is a Do-It-Yourself kit, not an assembled module. Building instructions can be found here.

DIY level: medium. The assembly is really easy and suitable for beginners.

The Robaux 3PT is a three-channel multimode CV generator. The digital «Tripot» contains seven different modes. You can use it as a macro controller or as a modulation LFO. It works as a chord progression generator and can also be used as a quantizer with 25 scales as well as a quantizeable random generator. Last but not least it offers two sequencer modes: an 8-step sequencer that can be split into two channels and a triple Euclidean rhythm generator.

Here you'll find a video.

• Current draw: +12V: 65mA, -12V 0mA
• Width: 10HP, depth: 32mm, Matte FR4 Panel

• Inputs: 1 x unipolar 5V, ADC 10 Bit

•  Outputs: 3 x unipolar 5V, DAC 12 Bit

DIY level: medium. The assembly instructions are here.

Wired Heart is a battery powered experimental sound synthesizer. It features six sensors which can detect touch and humidity. Each of the sensors controls the pitch of an oscillator: Press harder or have more sweaty hands to get a higher pitch. Touch multiple sensors at the same time to create crazy cross modulations by the current flowing through you. Each sensor serves a different function. It is best to explore the Wired Heart sound universe by trial and error.Just insert a 3V CR2032 battery and have fun! Here is a YouTube video about it!

How Does It Work? There are two master oscillators, each controlling two slave oscillators. The slave oscillators are modulated in different ways: The left master osc modulates the amplitude of its associated slave oscs. When the master frequency is low you can hear the two slave oscs being turned on and off alternately. Higher frequencies create weird, sometimes voice-like sounds - in stereo. The upper right slave osc is modulated in a hardsync-like way. The osc is reset each time the master osc starts a new cycle. This creates rich sound spectra reaching from stutter to voice-like sounds to unexplainable stuff. The lower right osc is frequency modulated by the master osc. At lower master frequencies this creates tremolo effects. At higher frequencies you will hear sounds like bells or voices. Via the stereo output jack the Wired Heart can be connected to an amplifier or headphones. The output jack additionally works as a power switch. If disconnected, Wired Heart is in standby mode and consumes very little power.

Upgrade Each oscillator of Wired Heart comes with extension ports to connect additional electronics. The kit comes with 3 LEDs, 3 LDRs and a potentiometer. By using the LDRs the oscillators will react to light. This can be your hand covering an existing light source, a flashlight shining onto the heart or the light of one or more LEDs. The LEDs in turn flash with the rate of the oscillators. By simply connecting a few components you can create a never-repeating, chaotic self driven sound source.

Building instruction is included in the box.

DIY level: easy as fuck, only a few solder joints, as most is pre-polulated SMT parts.

The SWT16+ is a 16-track Eurorack step sequencer with up to 64 steps per track. The module makes it possible to create up to 8 different patterns which can stored in a total of 16 presets. Programmable like a classic TR machine, the SWT16 can be used not only for triggering drum sounds but also envelopes or other modulation sources. Here you'll find an introduction video and one video about the basics.

• Current draw: +12V: 65mA, -12V 0mA
• Width: 20HP, depth: 30mm

DIY level: medium. The assembly instruction PDF is here.

Monotropa is a 4 band feedback equalizer distortion module. This is the third revision of the Feedback EQ distortion module. Here is a video and here a Soundcloud demo.

Features:

• 4 band feedback EQ distortion

• 2x audio / CV inputs

• 2x audio / CV outputs

• EXT audio input, EXT audio outputs (SEND RETURN path)

• 4 potmeters for frequency volume

• 1 potmeter for feedback amount

• 1 potmeter for gain amount

Use this effect as a sound destructor, weird oscillator, CV mutator. Route effects through the EXT path for more audio mangling and adding CV ‘sidechain’ control over the feedback path.

Power: +12V: 15mA, -12V: 15mA

Width: 8 HP

Depth: ?mm

This is a Do-It-Yourself kit, not an assembled module. The building instructions are here.

DIY level: easy/medium.

A five channel audio mixer with 3 outputs for easy feedback routing. Black panel with 555 pentagram – the extra evil mixer! Here is a video and here a Soundcloud demo.

Features:

• 5 channel audio mixer

• 5 channel volume potmeters

• 1 SUM gain potmeter

• 2 normal outputs

• 1 inverted output

For feedback mixing: route output 2 to an effect, for example a distortion, equalizer, filter. Patch the output of that effect back into a channel of the Pentamix. Open up that certain channel for unholy feedback sounds of the other dimension. The inverted output gives other results. try it! This is an easy project, very suitable for beginners as a first soldering project. Highly functional for any modular user!

Power: +12V: 4mA, -12V: 4mA

Width: 8 HP

Depth: ?mm

This is a Do-It-Yourself kit, not an assembled module. The building instructions are here.

DIY level: easy/medium.

The newest version of the Noise module, an oscillator based on a CMOS Logic IC.

Noise! has got 4 knobs for frequency, 4 CV inputs, 4 outputs, an internal patchbay, range jumpers for OSC1 and OSC2 and several modding possibilities. This new v8 PCB & panel don’t need any wiring and are suitable for skiff cases. The synth is based on 4 squarewave oscillators that modulate each other, go through a clock divider and are mixed together to create harsh noise and random control voltage. The result is often unpredictable and evolving, suitable a source for snares, hihats or as ‘unpure’ audio texture designs. When the range jumpers are placed, a whole new beast appears. Chaotic structured beats, noise rhythms and artifacts are spitted out. Checkout the Soundcloud demos.

• 4 x Frequency knob

• 4 x CV In

• 4 Outs

• Transparent knob

Power: +12V: ?mA

Width: 8 HP

Depth: 45mm

This is a Do-It-Yourself kit, not an assembled module. The building instructions are here.

DIY level: easy/medium.

Noisefoc (now v1.1 with better CV input) is an experimental Oscillator, good for noise and Pan Sonic style buzz sounds. It's nice as a pure sound source or as a base for hihat and percussion sounds. Noisefoc is a great learning project, in the manual the basic parts and their functions are explained. It is based around three CMOS NAND gates as oscillators, controlled by potentiometers and a light dependent resistor (LDR). There's an optical representation of the frequencies via LEDs, two mixing circuits (different sound via diode or resistor mixing) to mix the oscillators and a power starving function which makes the device completely out of control. The Eurorack version features a CV input for pitch influence via optocoupler.

The frontpanel was designed by Hannes Pasqualini / Papernoise.

DIY level: easy. Download the building instructions and manual here.

VCO-1 (v1.4) is a purely analogue VCO (oscillator) for the modular Eurorack system. It can complemented by EXP-1 Expander module to add many functions like Sync, lin. FM, Wave Morphing, LFO etc. VCO-1 is temperature stable and provides a clean 1V/oct tracking over minimum 4 octaves. VCO-1 and EXP-1 are a powerful combination of modules with lots of instant fun! High quality parts, switches, pots and knobs, good feeling and big enough for comfortable everyday work, no fiddly controls. Check out the module on Modular Grid.

Here is a build video about VCO-1 and EXP-1 by Synth DIY guy. Very nice to watch before you build it, specially for beginners.

Controls:

Tuning (Coarse) ca. 20Hz - 20kHz

Tuning (Fine) ca. 8 half tones

Pulsewidthmodulation (PW)

Connectors:

1V/oct input for CV-controlled pitch

PWM input for CV-controlled pulsewidth

Pulse audio output

Saw audio output

Power consumption: +12V: 18mA -12V: 17mA. Width: 10 HP, depth 35mm. This kit has all the necessary parts to build, including front panel and power cable. Building instructions and manual can be downloaded here. The frontpanel was designed by Hannes Pasqualini / Papernoise.

DIY level: medium. After finishing it, the 1V/oct tracking has to be adjusted, what might need some experience.

EXP-1 (v1.3) is an expander module for our analogue Eurorack oscillator VCO-1. It adds an LFO (bi-polar LED) with two waveforms (square, triangle) and various modulation targets, sync, lin. FM, wave morphing, an additional triangle output etc. Together with VCO-1 it is a complex oscillator with lots of internal or external modulation possibilities. Check out the module on Modular Grid.

Here is a build video about VCO-1 and EXP-1 by Synth DIY guy. Very nice to watch before you build it, specially for beginners. 

Controls:

LFO Freq. ca. 0,01Hz - 200Hz

LFO Amt. (target via selector)

Lin FM (int. LFO / ext. signal)

Morph (int. offset / ext. CV)

LFO Shape (Saw / Square)

LFO Target (Morph / PW)

Morph Mode (Tri-Spare / Tri-Saw)

Connectors:

LFO Freq (ext. CV influences LFO Freq.)

Lin FM Input

Morph CV Input

Sync Input

LFO Output

Morphed Output

Triagle Output

Power consumption: +12V: 16mA -12V: 18mA. Width: 10 HP, depth 35mm. This kit has all the necessary parts to build, including front panel and power cable. Building instructions and manual can be downloaded here. The frontpanel was designed by Hannes Pasqualini / Papernoise.

DIY level: medium.

Descent is an analogue dual envelope generator. It provides 2 independent voltage controlled decay EGs. The envelopes can be switched between triggered or gated (sustain) mode. The first trigger input is normalized to the second one and each channel provides a LED to visualize the envelope signal. The shape of the envelope can be adjusted between lin/exp with a trimmer on the back of the PCB. Decay times are adjustable between a few ms up to several seconds. It comes as a complete kit with all needed parts to build it. That includes a multi colour aluminum frontpanel, high quality jacks and smooth 9mm metal pots.

• Current draw: +12V 70mA | -12V 30mA
• Width: 6HP
• Depth: 40mm
• CV input voltage: +/-5V
• CV output voltage: 0-8V.

Building instructions can be found here. DIY level: easy, medium.

THIS IS THE BLACK PANEL EDITION!

The TubeOhm SMR4P is a 10HP Eurorack Multimode VCF that combines the best features from two different filter circuits. The SMR4P design features the warm sound of the SMR4MkII filter alongside the 15 various filter shapes of the 4-Pole Mission VCF. This makes SMR4P a powerful ‘Swiss Army Knife’ filter, that can be switched between different filter types and slopes depending on your current need. This design also has some extra creative features, such as voltage-controlled switching between filter types, VC Cutoff Modulation, internal FM and a built-in VCA.

• Lowpass Modes: 6 + 12 + 18 + 24dB
• Hipass Modes: 6 + 12 + 18dB
• Bandpass Modes: 6 + 12dB
• Other Modes: HP2LP, HP3LP,Notch,Phaser, Notch+LP1, Phaser+LP1
• Current draw: 50 mA on + 12V, 30 mA  on -12V
• Width: 10HP
• Depth: 55mm
• Freq. Range: 20Hz - 22kHz

Building instructions can be found here. DIY level: advanced.

An essential tool for DIYers! Test 3 is a tool for measuring voltages and currents in your Eurorack system. This means that just a single circuit board or module can now replace a convoluted test setup with multiple multimeters, custom cables etc. Two push buttons allow you to cycle the value shown on the LED display between three measurements (voltage, current and stored peak current) of the three power rails. The peak currents continually update in the background on all rails, making it ideal for quickly getting maximum current figures. Apart from measuring the current draw of a single module, Test 3 also supports testing power supplies and cables, measuring an entire system (up to 1 A of current on each rail), troubleshooting DIY modules, powering a skiff or breadboard from a larger system...

• Width: 8 HP
• Current draw: +12: 35 mA

DIY level: easy. Building instructions can be found here.

This current edition has temporarily a black panel!

Penrose is a very nice CV quantizer DIY kit for the eurorack format. It takes an incoming continuous CV voltage and converts it to the nearest note in a scale. Active notes can be selected with the 12 buttons. You can use it to tune the output of your analog sequencer, as a semi random melody generator, for fast chiptune arpeggios and much more. It comes as a complete kit with all needed parts to build it. That includes a multi colour aluminum frontpanel, high quality jacks and illuminated bi-color push buttons. The project is open source, so the schematic and source code is available.

Specs:

• Current draw: +12V 60mA | -12V 2.5mA

• Width: 6HP Depth: 40mm

• CV input voltage: 0-10V
CV
• Output voltage: 0-10V

Building instructions, more infos and demos can be found here.

DIY level: easy/medium.

Mal-2 is a random signal generator mainly intended as CV modulation source. It has 2 modes of operation to provide you with smooth random goodness. Imagine Eris herself lends you a third hand to keep your patches interesting. 1) In the first mode the CHANGE knob morphs from a cubic interpolated (sine like shaped) random signal to a random walk function that could make a wallstreet broker delirious with joy. 2) In the second mode the CHANGE knob sets the self similarity. On the minimum setting the signal is completely random. On the maximum setting the random sequence is locked to a repeating, identical 8 step sequence. In between the sequence seamlessly morphs to new shapes over time. This gives you a random CV where you can shape the bounds in which the chaos unfolds and goes far beyond a slew limited white noise.

Specs:

•     6 HP
•     12 bit CV output
•     through hole components DIY kit
•     Random gate output
•     CV inputs with attenuverter for both knobs
•     super slow cycles times up to lower audio range
•     +12V 60mA | -12V 5mA

Building instructions, more infos and demos can be found here.

DIY level: easy/medium.

Four oscillator sound generator. Extensive modulation between all VCOs. Hz/V CV input.

It's rather complex build consisting of roughly 150 parts, so prepare for 2 hours of soldering. And hopefully you will enjoy playing it just as much as assembling it. This is four-oscillator cross-modulation drone sound generator, that can also play nice and polite sounds, even controled via external Hz/V signal. But that's not why it was made for. There are 4 identical VCOs, each producing 3 waveforms that can be separately mixed to audio output and to modulation matrix. Each VCO can frequency modulate all other 3 VCOs, so you can expect wild and crazy sounds coming out of it. Demo video is here on YouTube.

DIY level: medium. Assembly manual can be downloaded here.

The perfect solution for midifying small analogue synths or gadgets due to small dimensions: 17x12x4mm. The PCB itself comes assembled. Midi input, one pair of CV/Gate outputs, V/Oct scale only, stable scale over four octaves, MIDI-learn button and configuration via Sys-Ex. Made by Midi-Hardware.com. We also offer a full kit, including box and all you need to build a full standalone interface with a small budget. Power supply available separately here. Please check detailed info and instructions before you buy, they can be found here.

DIY level: easy. The PCB itself comes assembled, only a few cables to solder.

This is the die-hard approach to power distribution or call it busboard for Eurorack modular. Made to prove that even such a simple component can be made with care for every detail. This is no teeny-weeny bus board with itsy-bitsy traces that can't handle real currents. There's a lot of copper used on top and bottom sides of PCB to minimize resistance to insane levels. It uses 125 micron copper, that is almost 4 times thicker than good quality PCBs. The PCB itself is also thicker (2mm) and it's not so likely to bend. This is all you need to go along with nice and clean linear power supply, but if your case is powered by switching power supplies like popular MeanWell bricks, it's good idea to add one or two Noise Killer Plugs (NKP) that will clean most of the high frequency noise. NKP does not take any pin header as it's pass-thru device, there's still 18 power ports available for modules even with 18 NKPs in place (although it makes no sense to insert more than 4). Power input uses heavy duty M4 screw terminals, no need to crimp any kind of connectors when wiring power supply, just strip the wire. It's also easy to chain, as the terminals easy accept 2 wires. Each busboard is fully tested on each connector at 3A current per rail.

Why is it so important to have low GND resistance? Imagine there are few modules plugged in, drawing considerably high currents. This combined current causes voltage drop on busboard traces. For example if your GND trace has 0.1 ohm, which seems pretty low, and there is about 500mA flowing to GND rail (not so much really for one row of modules), then you get 50mV offset created between different power connectors. And since every CV is referenced to GND, that means every module on the busboard will be affected with a voltage that means almost a semitone in 1V/oct scale. Power in old modulars was distributed in star-ground fasion to avoid that, but never in eurorack. POWDIS power distribution board comes to the rescue with the extreme 1 miliohm resistance measured from GND power terminal screw to the most distant 16-pin power connectors. This is even lower than resistance of single pin-plug connection. As a comparison, typical module power cable of 1ft length can have about 50-80 miliohms DC resitance per wire, that goes down to 8-13 miliohms when all 6 wires are used for GND.

You can download a PDF as a drilling template for your case here.

SOON AVAILABLE AGAIN! Our converter is a top solution for:

• any DIY project that needs clean and stable 9V like guitar pedals etc.,
• if you want to migrate your 9V projects into your Eurorack system or want to create a stable 9V source from your Eurorack,
• and generally all projects like Fuzz boxes, which suffer from bleed through caused by dirty switching supplies.

All that mess is cleaned up!

Our converter uses 12V (DC) -+20% on the input and generates a stabilized, very clean 9V +-1% of 150mA at the output side. It also is save against wrong polarity on the input, overpower save due a self resetting fuse. It works with all of our 12V DC power supplies.

DIY level: easy. The PCB itself is assembled, only a few cables to solder.

We developed this module to power modules like our TR-808 Kick or single Eurorack modules by a standard power supply. It uses 12V to 18V (DC) on the input and generates a symmetrical output of +/-12V (1W) at the output side. It also is save against wrong polarity on the input, overpower save due a self resetting fuse. It's a top solution for any DIY project that needs symmetrical power. A more powerful version is also planned. We also offer a power supply for it.

DIY level: easy. The PCB itself is assembled, only a few cables to solder.

Dual Velocity Voltage Controlled Amplifier

The VVCA is an analog dual linear VCA can be used for audio and CV signals. The VVCA features two individual VCA’s. Each VCA behaves just like any other normal VCA when there is no cable connected to the velocity input. The velocity input offers velocity control over the CV input level, which means: The output level can be controlled by CV and Velocity.
Width: 4HP, power consumption: +12V (15mA), -12V (15mA), 5V (10mA)

Here is a demo video. Building instructions can be found here. DIY kit includes all parts.

DIY level: easy

Midi To CV Converter

Width: 14HP, power consumption: +12V (39mA), -12V (25mA), 5V (30mA)

Here is a building video on YouTube. Building instructions can be found here. DIY kit includes all parts.

DIY level: medium