DIY Kits
sold out at the moment
The 7J is a compact joystick controller module. For each axis the joystick can work as an attenuator or attenuverter, selectable via unipolar or bipolar mode switches. The inputs (normalled to +5V) have dedicated attenuators and both X and Y outputs are equipped with continuously variable offset control (-5 to +5V) for fine-tuning the voltage ranges independently. The 7J also has a manual gate generator on board. The joystick itself is without an auto-return to centre spring, perfect for hands-on expression and playful interaction.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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The 8S is an 8 step sequencer in 8 HP with control over parameters of the sequence as reset, hold, random step and direction. It’s been designed to work with clock related signals like triggers or gates but any type of CV signals can be used at its inputs. The output signal path is completely analog and its range can be set as unipolar (0 to +5 volts) or bipolar (-5 to +5 volts) via jumper on the back.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
This small board is designed for you to easily power your breadboard with the common Eurorack voltages - directly from the bus in your case. The kit includes the PCB and all the parts necessary to supply voltages of -12V, + 12V and + 5V into your breadboard and it is possible to power the board from a 10 or 16 pin ribbon cable. In addition to reverse polarity protection diodes and power filtering capacitors, a point of connection to ground has been also added to solder a terminal to connect an oscilloscope or multimeter.Please be aware that there are multiple types of breadboards. This kit is designed to fit on 48 mm Breadboard!If you can't find a build guide, please email Transient Modules!DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
Midi2TRS is a very simple but handy DIY kit. It does 2 things:• it converts the Midi-DIN input to 3,5mm TRS like it’s used now on many synths and controllers nowdays• it switches the polarity on the TRS side and by that flips MIDI TRS-A standard (E.g. Korg, RK006) to TRS-B (for e.g. Arturia and older Novation products) and vice versa. You can use this together with any length TRS audio cable and have TRSA and B work together in an elegant way.There is a good explanation about MIDI via TRS at 'other links'.It's so dead-easy that no build guide is neccessary, but if you have questions please email Transient Modules!DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
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The u1P is a Bernoulli gate. Based on the probability set by the potentiometer, it randomly routes a trigger or gate signal sensed at the input to either of its two outputs. Having three different operating modes (direct, toggle, single), it becomes a useful tool for adding spice and variety to your drum beats or sequenced gates.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
The u2X is a dual buffered multiple DIY kit for the 1U Intellijel format. With bicolor LEDs for monitoring signals. Each input is copied into three outputs. As the top section is normalled to the bottom section it’s also possible to get 6 copies of the same signal.DIY-Kit-Type:SMD-Kit-2. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. It includes SMD and through-hole parts! For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
The u3A (v1) is a three channel attenuverter DIY kit for the 1U Intellijel format. Useful for scale, add offset, invert or sum signals. As each input is normalled to +5V, with nothing plugged into the jacks, each knob controls a voltage range from -5V to +5V. Each output is also summed to the adjacent channel on the right when no cable is connected.DIY-Kit-Type:SMD-Kit-2. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. It includes SMD and through-hole parts! For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
The u4R is a 1U adaptation of the 3U module 4R. It generates two different random stepped voltages per input, each time a rising edge is sensed at TRIG1 or TRIG2. The inputs are independent so they can work at different clock speeds. As TRIG2 is normalled to TRIG1 it is also possible to get 4 random stepped values with just one trigger. The voltage range of each pair of outputs can be set as unipolar (0V to +5V) or bipolar (-5V to +5V).DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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The transistorkreis random is a quad true random voltage generator for modulation and for digital noise. There are two inputs to trigger new random voltages and each of the four outputs can be switched to• uniform or normal random distribution,• unipolar or bipolar voltage range,• an amplitude of 5 Vpp or 10 Vpp.Assembling the 3U DIY kit is straightforward since all SMD components are already soldered. Nevertheless, basic knowledge of soldering and electronics is mandatory. The generic design of the transistorkreis random supports any modular format and its firmware is open source. Respectively, you can customize it to suit your requirements. Including screws and washers for your module carrier and a Eurorack power cable with the Eurorack version, which is skiff-friendly.DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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The transistorkreis random is a quad true random voltage generator for modulation and for digital noise. There are two inputs to trigger new random voltages and each of the four outputs can be switched to• uniform or normal random distribution,• unipolar or bipolar voltage range,• an amplitude of 5 Vpp or 10 Vpp.The generic design of the transistorkreis random supports any modular format and its firmware is open source. Respectively, you can customize it to suit your requirements. Including screws and washers for your module carrier and a Eurorack power cable with the Eurorack version, which is skiff-friendly.DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
available
Tubbutec Drummertime is a performance-focused, TR-x0x-inspired Eurorack drum step sequencer built for fast hands-on programming and live editing. Available in multiple 1U formats, Drummertime combines large, illuminated buttons with deep sequencing features—pattern chaining, per-step probability, swing, ratchets/flams and flexible play directions—so you can sketch grooves quickly or perform complex, evolving drum arrangements in real time. Eight instrument channels give you per-step control and independent trigger outputs, while robust clocking options (internal clock with tap tempo, analog clock or MIDI clock) plus MIDI I/O make integration with both modular and MIDI ecosystems seamless. Multiple units can be linked for longer patterns or additional instruments, and the intuitive LED feedback system (red/blue/purple) keeps state information visible at a glance, making Drummertime ideal for live rigs, studio grooves and hybrid analog-MIDI workflows.This version features clicky switches.Features:• TR-x0x–inspired step sequencer with 8 instrument channels and 16 steps per pattern.• Pattern chaining / song mode (up to 32 patterns).• Multiple play directions: forward, backward, ping-pong, smart random.• Per-step probability, flam/ratchet and adjustable swing for humanized grooves.• Live tools: mute, tap recording, clear-while-playing, copy/paste patterns.• 8 trigger outputs, MIDI I/O and analog clock (internal clock with tap tempo and dividers).• LINKable to other units for longer patterns or extra channels (expandable up to 64 steps).• Two formats: single-module 1U 74HP or split 1U 60HP + 3U 4HP (Palette-compatible).DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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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!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.UpgradeEach 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.DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
Jeannie is an 8-voice polyphonic DIY synthesizer by TubeOhm’s Andre’ Laska and Rolf Degen, who also worked with Sonic Potions and others. They really took their time to develop it during the past few years and now here is it, currently released in small batches. If it is out of stock, it will come back soon after.Jeannie features 2 Oscillators, Noise, 2 Envelopes, a Multimode Filter, Waveshaper, 2 LFOs, Ring Modulator, FM, XOR, OR, and a Step Sequencer. The Oscillators can run independently or synced and feature the impressive amount of 945 different waveforms each! 2048 sounds programs can be stored on the SD Card.New to the latest firmware is an adjustable Waveshaper per voice. Unlike in many other synths, the Waveshaper is located after the filter, what gives extremely interesting timbres and has its advantages.The synth contains a digital effect processor with 14 different, adjustable effects.TubeOhm are constantly improving the firmware at the moment, so you can expect updates and new features during the near future.This is definitely an extremely interesting DIY project with a high price/performance ratio. Hopefully a little community will grow over time around that nice piece of gear.It is coming with an acrylic case, but Erica Synths are manufacturing a very nice aluminium case for Jeannie, which can only be ordered at Erica: https://t1p.de/3n2ofDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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Bipolar Attenuator & DC SourceAttenuators are very useful modules on every system. Taking control over the amplitude and polarity of the signals becomes necessary when we want to have full control over our sounds.Asset has been designed with compact systems in mind. Is small enough to not take much space on the rack but also powerful, providing six channels with individual controls over each circuit parameter. Some design decisions make Asset a different approach from the classical “Attenuverter” circuits:The pots work in a classical unipolar way, allowing to shut down the signal completely as you don’t need to deal with its center position. It also gives you more precision as the whole range of the pot is used either to attenuate or invert, not both.Having manual switches to either invert the signal and the offset is useful when we just want to invert the signal, keeping its original amplitude intact.Input chaining adds tons of flexibility to the patch allowing the use of the same signal multiple times in different ways. A perfect functionality to use on generative or polyphonic patches.Features:• Six channels• DC Offset generator per channel• Selectable Invert mode for both attenuation and offset circuit• Daisy-chained inputs• Offset generator range: +/- 10V• Input Impedance: 100kΩ• Output Impedance: 1kΩDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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Quad-Core Multimode FilterWhen we talk about the sound signature of synths, filters are probably one of the first topics appearing.On Atlas, we dive into the sound of the 80s Japanese classics with four gain-cell-based multimode filters that keep the silky and creamy sound of those legendary machines along with some technical improvements like a better noise floor, an accurate resonance compensation, and a daisy-chain input implementation that makes some patching techniques like parallel filtering a lot easier.The filter cores have been carefully designed and tweaked to be pristine without losing character. With three filter modes available per channel, 4p-LP, 2p-HP, and 4p-BP, Atlas can cover almost any filtering technique, from superb filter sweeps to multi-slope resonant patches.Thanks to its precise resonance circuit, each core creates a clean sine wave when self-oscillating. Excite the inputs with fast trigger or gate signals, and you will get TR-like drum sounds, from deep kickdrums to nice toms and congas.In addition, the module counts with a CV-controlled Interpolating Scanner circuit that morphs softly between each filter output, creating new shapes and timbres as it fades between the channels.Features:• Four analog multimode, gain-cell-based VCF circuits.• Three modes per channel: 4p-LP, 2p-HP, and 4p-BP.• Resonance compensation circuit.• Daisy-chained audio and Freq inputs.• Secondary CV input, selectable between Frequency or Resonance.• CV-controlled Interpolating Scanner circuit.• Input Impedance: 100kΩ• Output Impedance: 1kΩ• CV Inputs Range: 10Vp-p• Frequency Range: ∼ 20Hz to 20KHzDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
High-Class Linear VCA & MixerIf you have been already into the Eurorack world for a while, I’m sure you have heard the sentence: “you never have enough VCAs” more than once.As an electronic musician, this has always been present. I can’t count how many times I needed an extra VCA with all of them already being used.I wanted to create an all-around, good-sounding, and handy VCA, small enough to fit on little systems but with a good amount of channels and functionality. And this is what Ceres is.Its core, the 3360, has been used for years in dozens of devices with remarkable performance. Sum it to a carefully designed 4-layer PCB layout, and we get a super quiet VCA in terms of noise and CV bleeding.The combination of daisy-chained inputs and mixed outputs achieves a vast range of possibilities. Several CV signals can modulate a unique source with every output mixed back at the final stage to create new waveforms and open the door to experimentation.Features:• Six channels• Low noise analog VCA circuits• Precise Linear response• Quiet signal path• Daisy-chained audio inputs• Mixing stage on channel 6• Unity gain CV level: 5V• Input Impedance: 100kΩ• Output Impedance 1kΩDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
Hexa Core Slope GeneratorThe world of Envelope generators is a vast field where cultivating a new specie is a challenge that gets harder every day.We have lots of flavors to choose from: from classical ADSR to Serge-based Slope generators, through the newest digitally controlled multi-stage modules.The concept behind Fuji is not to create a new flavor, but to offer a big amount of the most primary envelope circuit along with some design decisions to make it a useful, immediate, and always musical tool.The slope of the envelopes is tuned with logarithmic Attack and exponential Decay. This configuration has been used for years as it follows the non-linearity of human hearing, keeping the dynamics changes always pleasant and natural to our ears.The range of both the Attack and Decay stages is symmetric, getting a minimum and maximum rise/fall time of either 1.5ms to 1.5s. This range has been also tuned to be musical and precise in most applications.Gate input chaining adds tons of flexibility to the patch. Groups of synced envelopes can be easily made with a few cables.Features:• Six channels• Fully analog AD envelope generators• Selectable Hold and LFO mode per channel• Daisy-chained Gate inputs• Envelope Level: 8V• Gate Input Threshold: 1.5VDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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Halo is a compact quad LFO for Eurorack systems, designed to deliver a wide range of modulation sources in just 10HP. With four analog CV-controlled LFO channels and up to 16 simultaneous outputs, it provides everything from classic cyclic movement to complex logic-based modulation.Each channel offers manual and CV control over frequency, with selectable range settings covering slow cycles of more than two minutes up to audio-rate modulation at 80Hz. Triangle and square outputs are available per channel, giving you immediate access to classic LFO shapes for modulation, rhythm, movement and animation.The dedicated Logic section expands Halo far beyond a standard quad LFO. Each channel pair is processed through analog boolean circuits, generating AND, OR and XOR outputs, plus a mixed signal. This adds eight extra modulation outputs and creates evolving, interrelated patterns from simple source waves.Features:• Four analog CV-controlled LFO channels.• Manual and CV-controlled frequency per channel.• Triangle and square outputs for each LFO.• Selectable frequency range from over 2 minutes to 80Hz.• Dedicated Logic section with AND, OR, XOR and MIX outputs.• Eight additional logic-based modulation outputs.• Up to 16 simultaneous modulation signals in 10HP.• Compact Vostok layout with immediate hands-on control.DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
sold out at the moment
Hive is a four-channel stereo mixer offering per-channel CV-controlled panning with the trademark Vostok twists that turn a straightforward mixer into a versatile toolbox for any rack. Each channel includes a boost stage to match levels between modules and to accommodate pro-line devices like desktop synths or drum machines, so signals sit correctly in the mix without extra attenuation or padding.Panning uses a custom law with −1.5 dB attenuation at center, delivering smooth, musically balanced transitions whether adjusted by hand or driven by CV. Rear-panel chaining connectors let multiple Hive units act as channel expanders or submix stages, enabling larger mixes and flexible routing topologies.Housed in just 10 HP, Hive combines compact footprint with practical features for stereo mangling, FX sub-mixing, end-of-line mixing and more, making it a handy utility for both performance and studio patching.Features:• Four-channel stereo mixer with per-channel CV-controlled panning.• Per-channel boost stage for level matching and pro-line device compatibility (desktop synths, drum machines).• Custom panning law with −1.5 dB center attenuation for smooth, musical balance transitions.• Manual or CV control of pan for dynamic stereo movement.• Rear-panel chaining connectors to use additional Hive modules as channel expanders or submixes.• Compact 10 HP footprint that saves space in crowded cases.• Clean summing and routing suited to stereo mangling, FX sub-mixing, or end-of-line mixing.• Robust build and layout focused on fast, hands-on workflow in live and studio setups.DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.
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Multi Channel Sound SourceVCOs are probably the most popular modules in the Eurorack world.At its most common form, an oscillator module creates different basic waveforms by shaping its core, which gives us several timbres sharing the same frequency.On Sena, we decided to reorganize those principles. We have the basic waveforms as on any VCO, but each has an independent core and frequency control. In addition, the tuning inputs of each channel are daisy-chained, allowing to create easy transpositions or detuning between them.To maximize stability and tracking accuracy, every channel is designed around the famous 3340 oscillator core, present in many legendary synths like the Roland SH-101 and Jupiter-6, Oberheim OB-Xa, and the Sequential Prophet-5.On top of that, the module counts with four dedicated CV-controlled Modifiers to extend the timbral range of each core: a two-stage Folder for the Sine, a Trapezoid shaper for the Triangle, a Phase modulator for the Saw, and a half-range Pulse-width modulator for the Square.The addition of a complete analog Noise Bank makes Sena a super powerful and compact sound source. A cornerstone for any Eurorack setup.Features:• Fully analog VCO circuits: Sine, Triangle, Saw and Square• 1V/Oct pitch tracking over eight octaves• Dedicated CV controlled Wave Modifier on each oscillator• Daisy-chained Freq inputs with onboard buffers• Selectable LFO mode per channel• Analog noise bank with White, Pink, Blue and Brown circuitsDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.