Erica Synths BBD Delay/Flanger is one of the few bucket brigade delay chip based DIY modules. The module has been designed to provide variety of effects from flanger to delays with adjustable flavours and plenty of modulation possibilities. There is a built in LFO with selectable shape as well as a dedicated LFO output. The BBD also features CV over delay time with on-board attenuator, selectable feedback overdrive and feedback Send-Return connectors, so you can apply external effects on feedback signal. Maximums feedback settings put the module in self oscillation, so it can be used as an experimental sound source as well.

Build Document – BBD Assembly Guide | Build Video

Features

• 4092 stage BBD
• Up to 300ms delay time
• Delay time CV input with an attenuator
• Feedback Send-Return circuit for external effects
• Built in LFO with dedicated output
• Two customisable feedback overdrive flavours
• LP filter on the output with selectable cutoff
• Dedicated Wet output

Specifications

4ms Pods are low-cost, portable, compact enclosures that turn Eurorack modules into table-top instruments. Powered Pods come with an integrated, daisy-chainable power supply that allows you to link multiple units in different configurations using only a single power brick.
Each Pod typically will house one or two modules, but three or more can be accommodated using a multi-power cable accessory. Standard M3 threaded holes allow for any configuration of modules.
Pods are available in a variety of widths: 20HP, 26HP, 32HP, and 60HP. More sizes will be available soon!

Mix and match your Pods with desktop synths, effect pedals, drum machines or any musical gear for a flexible modular system.

Made from 100% anodized aluminum, Pods are light, tough and perfect for on-the-go. The power supply can handle up to 700mA of +12V for the smaller Pods, and 1.4A for the Pod60, which is plenty of juice for even the most hungry modern digital modules. (Or if you prefer to DIY your power supply, Pods are also available unpowered)

Pods are a perfect way to get started in Eurorack module, or to add a couple more modules to your monster system. They can even daisy-chain with the 4ms Row Power system, making them a convenient outboard mini-skiff.

4MS Pods User Guide

Power

The powered Pod20, Pod26, and Pod32 have an integrated power supply with two standard Eurorack power headers; the Pod60 features four power headers. All Pods work with modules that use 10 and/or 16- pin power cables.

Multi Power Cables

If you need to install more modules than the number of power headers in your Pod, you can use a Multi Power Cable. One end plugs into the power header on the Pod, and the other connectors plug directly to modules. Each Multi Power Cable can power three modules from one power header. Multi Power Cables come in two varieties: 10-pin, and 16-pin. Choose the one that matches the type of power cable on your modules.

Daisy Chaining

Powered pods are meant to be daisy-chained. When you plug a Power Brick into one of the jacks on the back of a Pod, the other jack can be used to power an additional Pod. Simply connect a Barrel Cable from one Pod to the next. You can continue to daisy-chain Pods to make long chains! With a 45W Power Brick, 8 or more Pods can be daisy-chained (depending on the total power consumption of all the modules).

Unpowered Pods

Most Pods are sold with a power supply. Pods can also be sold “Unpowered”: essentially an empty metal box perfectly sized for Eurorack modules. If you purchased an Unpowered Pod, you’ll see there are no power headers or jacks on the back. You will need to provide your own power supply for your modules. If you have a Row Power module, it can be installed on the top of the Pod as a normal module. Additionally, there are two holes on the back of the Unpowered Pod which are plugged with a plastic insert: you can use these holes to mount a jack which connects to your own DIY power supply.

Specifications

Powered Pod Includes:
• Pod, black anodized aluminum
• Built-in power supply with two Eurorack power headers
• M3 x 8mm pan-head screws, stainless steel (10 for Pods under 60HP; 20 for Pod60)
• Adhesive rubber feet (4)
• Does not include barrel cable or power brick

Power Supply (Pods under 60HP):
• Two 16-pin Eurorack power shrouded headers
• +12V max 0.7A
• -12V max 0.28A
• +5V max 0.2A

Power Supply (Pod60):
• Four 16-pin Eurorack power shrouded headers
• +12V max 1.4A
• -12V max 0.56A
• +5V max 0.4A
• Maximum power draw for any
single module is: +12V: 0.7A / -12V:
0.28A / +5V: 0.2A

Power input:
• Two barrel jacks for daisy-chaining
• 15V-20VDC, 2.1mm positive tip

Exterior dimensions:
• Width:
• Pod20: 106.1mm (4.18”)
• Pod26: 136.58mm (5.38″)
• Pod32: 167.1mm (6.58″)
• Pod60: 309.3mm (12.17″)
• Height: 159.5mm (6.28″)• Depth: 36mm (1.42”)

Interior dimensions:
• Module depth: 34.2mm (1.34″)
• Module width:
• Pod20: 20HP
• Pod26: 26HP
• Pod32: 32HP
• Pod60: 60HP
• Weight:
• Pod20: 0.17 kg (6 oz)
• Pod26: 0.19 kg (7 oz)
• Pod32: 0.25 kg (9 oz)
• Pod60: 0.41 kg (14 oz)

BULK DISCOUNTS

Discounts are calculated on any combinations of type and value.
Add pots to the cart to see the actual cost for buying in bulk. Email for larger volumes.

Shaft Diameter – 6.35mm (0.25″)

Shaft Length – 20mm (0.79″)

These pots are almost identical to our regular Alpha round shaft pots but they have a longer shaft of 20mm (10mm thread). The longer shaft is useful when using thicker DIY front panels or when using larger knobs with a high placed set screw.  These pots work great with the 6.35mm round shaft knobs we sell, but do check the project specifications carefully to see if the longer shaft is suitable.

Apart from the shaft and thread length all other specs are the same as our shorter 15mm Alpha round shaft pots.

These pots have the same smooth and precise action as the rest of our Alpha range. There’s no anti-rotation tag that you have to cut or break off, and the nut and washer bagged separately. It only saves 20 seconds per pot maybe, but it adds up!

FULL DATASHEETS – https://www.thonk.co.uk/documents/alpha/9mm-long

The Żłob Modular VnIcursal VCA is a 6 channel OTA-based linear VCA in 8HP. All 6 VCAs are routed to a sum output so it can be used as a mixer as well. Each channel can be removed from the sum and used independently by patching a cable into it’s own output. The signal inputs are DC coupled for use with both CV and audio and when CV is inserted into the CV jacks, the pots become attenuators for incoming voltage. The VnIcursal VCA also features PCB offset trimmers for ultra silent operation with zero bleed. This is the latest PCB revision – Rev 5.4

VnIcursal VCA BOM – Bill of Materials

Specifications

• Width: 8HP
• Max Depth: 35mm
• Panel: Aluminium – Black / Red
• Power Consumption: +55mA, -55mA

The Skew Fade LFO is a 3HP all analog low frequency oscillator capable of a plethora of waveforms. It has three rate settings – with a range that goes down to 3 minutes and 30 seconds a cycle, up to audio range at 20 hz.  The Triangle wave output can be skewed between saws and ramps, while the Square wave output has pulsewidth control. The LFO’s unique feature is voltage controlled crossfading between skewable Sine and Square waveforms. It can also be self patched (eg. triangle into fade cv) for an extended pallet of waveforms. A bicolor LED provides constant display of positive and negative voltage crossings.

Skew Fade LFO Build Document – Assembly Guide

Specifications:

• 10vpp waveform outputs
• 45mm deep
• +12v: 15mA, -12v: 15mA

Entropy is an all analog random voltage and noise generator with a number of outputs and options. It features sample/track and hold normalled to white noise with a toggle switch for selecting either Sample & Hold (switch in right position) or Track & Hold (switch in left position). There is also a PCB trimmer to adjust the spread or gain of random voltages coming out of the module. This ranges from “scalar” (low gain, counter clock wise) to large interval jumping (high gain, clock wise).

Entropy also features dedicated outputs for analog white, pink, and brown (red) noise as well as a separate smooth random (INFRA) output with 2 range settings – with the switch in its left position, events will be quicker and more “wiggley”, while in the right position there will be less events and almost random rise and fall envelope behaviour. There is a white noise PCB trimmer to set the amplitude of the noise which in turn influences the rate of the INFRA out.

The aluminium Frontpanel has LED solder mask windows to indicate positive(red) and negative(blue) voltage crossings

Entropy – Assembly Guide

Specs:

• Width: 3HP
• Depth: 47mm
• 10vpp~ Noise Outputs (dependent on white gain trim)
• current consumption +12v: 10mA   -12v: 10mA

Entropy is an all analog random voltage and noise generator with a number of outputs and options. It features sample/track and hold normalled to white noise with a toggle switch for selecting either Sample & Hold (switch in right position) or Track & Hold (switch in left position). There is also a PCB trimmer to adjust the spread or gain of random voltages coming out of the module. This ranges from “scalar” (low gain, counter clock wise) to large interval jumping (high gain, clock wise).

Entropy also features dedicated outputs for analog white, pink, and brown (red) noise as well as a separate smooth random (INFRA) output with 2 range settings – with the switch in its left position, events will be quicker and more “wiggley”, while in the right position there will be less events and almost random rise and fall envelope behaviour. There is a white noise PCB trimmer to set the amplitude of the noise which in turn influences the rate of the INFRA out.

The aluminium Frontpanel has LED solder mask windows to indicate positive(red) and negative(blue) voltage crossings

Entropy – Assembly Guide

Specs:

• Width: 3HP
• Depth: 47mm
• 10vpp~ Noise Outputs (dependent on white gain trim)
• current consumption +12v: 10mA   -12v: 10mA

High quality glass filled nylon make-before-break PCB mounting rotary switch with 1 pole and 12 ways, includes locking washer to restrict the switch fewer positions if required.

38mm shaft length can be cut down to shorter lengths. This switch has a round shaft with a flat for securing the knob set-screw against.

Specifications

• Rotation angle is 30 degrees
• PCB pin mounting
• 1 pole, 12 position
• F5B shaft type – shaft 38mm long, 6.35mm round shaft, flat cut of shaft direction 90 degrees.
• Timing action – Shorting
• Part Number: SR2616F-0112-38F5B-D8S

Datasheet

Introducing Castle Series, a new set of eight DIY Eurorack module PCB & Frontpanel sets for video synthesis in LZX compatible format. Castle Series modules were designed by Philip Baljeu of Toronto, Ontario, and are inspired by early digital hardware video synths. Castle PCBs and Panels are recommended for intermediate and advanced level Synth DIY enthusiasts who are experienced with assembling thru-hole electronics assemblies and sourcing electronic components. If you are new to Synth DIY or need help troubleshooting your assemblies, please locate our user communities online.

Don’t forget to pick up these parts from Thonk!

PJ302M Jack Sockets – Here
Right Angle Pots – Here
1900h Knobs (6.35mm Round Shaft) – Here

Castle 000 – ADC

This Analog to Digital Converter is used to change an analog input signal in to a 3-Bit data stream. Bias and Gain (+/-N) are used to scale and bias the input signal. Use this module to interface with the rest of the Castle series or as a hard zone colorizer by itself.

+12V Current Consumption: 21mA
-12V Current Consumption: 28mA

Schematic | Bill of Materials

Castle 001 – DAC

The Digital to Analog Converter is a dual module to convert two 3-Bit data streams into two Analog approximations. Think of it as weighted summing mixers, with the MSB having the most amplitude, and LSB having least. Pair with the Analog to Digital Converter to produce a solarize effect, counter to synthesize waveforms, etc.

+12V Current Consumption: 3mA
-12V Current Consumption: 4mA

Schematic | Bill of Materials

Castle 010 – Clock VCO

The Clock VCO is a square wave Voltage Controlled Oscillator with a linear response to CV. Use as a clock source for modules such as the Shift Register and Counter. Horizontal and Vertical frequency ranges.

+12V Current Consumption: 9mA
-12V Current Consumption: 7mA

Schematic | Bill of Materials

Castle 011-Shift Register

The Shift Register is a 4 position memory of sorts. A bit is loaded from the DATA input at a logical “high” signal at the CLOCK input and appears at the Q0 output. At the next high Clock signal the bit is shifted from Q0 to Q1 and a new bit is loaded in to Q0 from DATA. When a bit reaches Q3 it is shifted out of the register. This functions as a delay on a 1-Bit datastream, where the CLOCK determines delay. If the outputs are combined with an XOR gate, an outline is achieved.

+12V Current Consumption: 21mA
-12V Current Consumption: 43mA

Schematic | Bill of Materials

Castle 100 – Multi Gate

The Multi-Logic Gate has 2 inputs and XNOR, XOR, NOR, OR, NAND, and AND outputs.

+12V Current Consumption: 28mA
-12V Current Consumption: 40mA

Schematic | Bill of Materials

Castle 101 – Quad Gate

The Quad Gate uses a single quad logic chip and combines them in 4 different ways. A1 and B1 are combined and appear at OUT1. A2 and B2 are combined and appear at OUT2. OUT3 is a combination of A1 and OUT2. OUT4 is a combination of OUT1 and A2. Any standard quad logic gate IC can be used, for example 4001 NOR, 4011 AND, 4070 XOR.

+12V Current Consumption: 31mA
-12V Current Consumption: 55mA

Schematic | Bill of Materials

Castle 110 – Counter

The Counter is a 4-Bit clock counter/divider. Each successive output from Q0 to Q3 is half the frequency of the previous. When used as a binary word it counts from 1 to 16. There is also an end of count output as RCO, when the counter reaches 16 it sends out a pulse on RCO. Used in conjunction with a Clock VCO and a DAC waveforms can be synthesized.

+12V Current Consumption: 39mA
-12V Current Consumption: 39mA

Schematic | Bill of Materials

Castle 111 – D Flip Flops

The D Flip Flops are three D type Flip Flops that share a common Clock and Reset. Each Flip Flop can be thought of as a single bit sample and hold. The signal present at a D input is held either High or Low when the Clock signal is High, respective of the state of the input. Since there are three Flip Flops available this module can be used to sample and hold a 3-Bit data stream.

+12V Current Consumption: TBD
-12V Current Consumption: TBD

Schematic | Bill of Materials

This full DIY kit contain all the parts needed to build your own Eurorack power supply. Excalibus is a skiff friendly compact power supply and bus all in one. Specially designed for medium portable Eurorack systems, Excalibus offers a great balance between space, power and stability.

FEATURES

• Ultra-compact distribution bus – only 12 mm tall and featuring horizontal connectors to maximize space.
• Power connector and ON/Off switch are specially situated to make assembly and integration on the case ultra-easy
• Excalibus is designed to be the only bus for a two-row system
• Includes optional terminal block for using your own power switch.
•  Input: 9 – 18v (Recommended 45W)
• Output Current:
  +12v: 1.2 A
  -12v: 1.2 A
  +5v: 1 A
• Measurements: 50mm x 400mm x 12mm

Build Document – Excalibus Assembly Guide

This kit includes everything you need to build the Mkii version of the Turing Machine. You just need to provide the tools and solder. Comes with 1ohp Aluminium Eurorack panel.

Since it was launched in June 2012, the Turing Machine has become one of the most popular Eurorack DIY projects. It is a random looping sequencer that spits out basslines and melodies. It generates strings of random voltages that can be locked into looping sequences. These sequences can be allowed to slip, changing gradually over time. This module was inspired by the long history of shift register pseudorandom synth circuits, including the Triadex Muse, Buchla 266 Source of Uncertainly and Grant Richter’s Noisering.

The 2016 revised Turing Machine has many improvements:

• Rotary loop length switch
• Pulse out
• Two boards, includes Backpack circuit to drive expanders (compatible with old Music Thing expanders)
• Easier to build: a larger PCB in the same width, clock and noise circuits are more robust
• Noise level trimmer & reduced voltage in noise circuit to make circuit more robust with different noise transistors
• Compatible with existing expanders (Pulses, Voltages, Vactrol Mix) but not the BYTES expander.

“I am interested in perceptible processes. I want to be able to hear the process happening throughout the music.To facilitate closely detailed listening a musical process should happen extremely gradually.” Steve Reich, Music as a Gradual Process, 1968.

Power – 40ma +12v, 0ma -12v

Depth – 33mm

Width – 10hp

Modular Grid – https://www.modulargrid.net/e/music-thing-modular-turing-machine-mk-ii

Build Document – https://thonk.co.uk/documents/turing2016/

Technical support and info – https://github.com/TomWhitwell/TuringMachine

Controls

• MINIMUM sets the minimum channel voltage.
• SPAN sets the voltage range of the channel. It essentially sets the maximum voltage that can be output from the channel, relative to what the current channel MINIMUM is. For a given SPAN value, if the MINIMUM voltage is changed then the maximum voltage output from that channel will also change respectively.
• DIRECTION sets whether the voltage transition for each channel goes from MINIMUM to maximum, or maximum to MINIMUM.
• The TRANSITION CONTROLLER slider controls the transition from the minimum value (A) to the maximum value (B) or vice versa, according to the settings of each independent channel.
• Moving this slider generates 5 different voltages with 5 different ranges and directions. The transition can also be operated from a CV source at the CV IN, in which case the slider position acts as an attenuator for the incoming voltage.

Patch Ideas

• Using the CV IN you can use two ADDAC306 modules to expand your control options to 9 voltage outputs under one common slider control.
• Use the VC Transitions to multiply the polyphony of a single CV sequencer by passing its outputs through the ADDAC207.
• VC Transition makes for an awesome state transition controller. Plug its outputs to various CV controller parameters of your audio effects modules. Set the slider to position A, and set the minimum values for each channel. Then move the slider to position B and set the SPAN settings for each channel. Use the TRANSITION CONTROLLER slider to morph from state A to state B and backwards. Flip the DIRECTION switches to change the direction of the transition for each channel. Use the CV IN to automate the transition using LFOs, ADSRs or sequencers.
• Plug the output of your ADSR envelope to the CV IN and set the channels differently to get 5 different ADSRs from one common source.

Specs:

• Width: 4HP
• Depth: 40mm
• Max current: 50mA +12V, 50mA -12V,

This kit includes everything you need to build a fully functioning expansion module apart from the tools and solder. Comes with 4hp Aluminium Eurorack panel.

This module is compatible with all versions of the Turing Machine. With the older Mki Turing Machine the Backpack module is also required.

The VVCA is a fully analog dual linear VCA which can be used for audio and CV signals.

The VVCA features two identical VCA’s. What makes VVCA unique is that each VCA has a velocity input, allowing you to modulate the incoming CV signal with a velocity voltage (or any other CV source). When there is no cable connected to the velocity input, the VCA behaves just like any other normal VCA.

The VVCA adds a tiny amount of characterful soft-clipping.

Included in the kit:
-Panel(aluminum)
-PCB
-All components (Resistors, capacitors, IC’s, etc.)
-Connectors + hex nuts
-montage screws (M3)
-16 pin power cable

Specification:
• 4HP Aluminum Panel
• DC coupled input; can amplify both audio and CV signals
• CV Input: 0-8V
• Velocity Input: 0-5V
• Outputs at same level as Input when both the CV Input and Velocity Input are at max
• This module uses the 5V rail (16 pin eurorack connector)!

Build Guide

User Manual

The Plutonium-239 Hyper Fist is a post-apocalyptic wavetable VCO with a resonant lo-fi feedback delay that specialises in spacey drones and screechy glitches. The Hyper Fist can also function as a regular wavetable VCO with on-board PWM and Waveshaping. The module features a clock input which can be clocked at audio rate to produce AM effects or at slower note/beat rates to produce interesting percussive synchronisation.​

User Manual

Patch List

Build Guide

Specifications:

• 8bit Grain table sound module
• 31khz / 10.5khz internal sample rate
• PWM Audio @ 76.5khz
• FREQ/MOD1/MOD2: -5 ..+5v safe but effective range 0..5v
• Clock input: 0-5v only
• On board 5v regulator, only +12/-12v rails required
• Current Draw Approx 58ma on +12v rail
• 14HP Dual Layer Acrylic Panel @ 3mm total thickness

The Dirty Glitch VCO is a highly experimental digital oscillator, harnessing grain table synthesis driven through dual glitch engines to produce sounds. This module has 1000 grain table patches to choose from – with a useful patch list provided for reference. The first 90 patches attempt to be more musical, like a contemporary VCO…make sure the delay (CLK RATE knob on these patches) is in the centre position to access all of the available tones. The following 910 patches are just outright bizarre, containing various clock, internal step-sequence and LFO / knob based modulations and weirdness as per the patch list. Aside from use as a VCO, Dirty Glitch can also be used as a highly interesting modulation source or produce some really unusual percussion sounds in conjunction with a VCA.

User Manual

Patch List

Build Guide

Specifications:

• 8bit Grain table sound module
• 31khz / 10.5khz internal sample rate
• PWM Audio @ 76.5khz
• FREQ/MOD1/MOD2: -5 .. +5v safe but effective range 0..5v
• Clock input: 0-5v only
• On board 5v regulator, only +12/-12v rails required
• Current Draw Approx 58ma on +12v rail
• 14HP Dual Layer Acrylic Panel @ 3mm total thickness

The Brunswick is perfect for those who want an introduction into the world of patchable analogue synthesis!

The Brunswick Synthesizer from Future Sound Systems is a newly designed, affordable synth voice with plenty of connectivity for exploration and integration with other devices. The Brunswick features a single VCO (Pulse & Sawtooth), multi-mode two-pole VCF and a character filled onboard VCA. The synthesizer also features it’s own internal LFO and envelope sections alongside FM inputs for the VCO and VCF. The Brunswick features a 24-point patchbay that allows for external voltage control over VCO pitch (v/oct) and envelope gate, as well as a slew of other inputs and outputs on 3.5mm mono jacks (see below for full list).

Demos

Features

• Full Synthesizer Voice
• Pulse/Sawtooth VCO
• VCO PWM & FM
• 2-Pole VCF with FM
• Internal Triangle & Square wave LFOs
• Internal Envelope & VCA
• PLL & Phase Comparator
• 24 point Patch bay
• Power: 2x PP3 9V batteries (+35, -20mA current draw)
• Batteries not included
• Dimensions: 194 x 120 mm

Patch bay I/O:

• VCO 1V/Octave pitch control input
• VCO PulseWidth Modulation input (normalled to LFO Triangle output)
• VCO FM 1 input (normalled to LFO Triangle output)
• VCO FM 2 input (normalled to Envelope output)
• VCO “Sawtooth” output
• VCO Pulse output
• Phase Comparator input
• Phase Comparator output
• Phase Locked Loop input
• Phase Locked Loop output
• LFO Triangle output
• LFO Square output
• Low-Pass Filter input (normalled to switched VCO output)
• Band-Pass Filter input
• High-Pass Filter input
• VCF output
• VCF FM 1 input (normalled to LFO Triangle output)
• VCF FM 2 input (normalled to Envelope output)
• VCA input
• VCA output
• VCA AM 1 input (normalled to LFO Triangle output)
• VCA AM 2 input (normalled to Envelope output)
• Envelope Gate input (normalled to LFO Square output)
• Envelope output

Build Document

Muffwiggler Build Thread 

A pack of three, six-way, Befaco-branded multiples. These are passive multiples with six 3.5mm sockets.

Re-arrange your modules in seconds! These things are great, they can be securely tightened with regular finger tightening without using any tool. They can also be tightened with a regular screwdriver.

M3 Knurlies are black, M2.5 are silver – both come with the washer already on the screw. Check your rails before selecting which size.

These are 6.5mm long from the base of the head to the end of the screw. The washer is 0.5mm long making usable length 6mm.