DIY Kits
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Macro ControllerKNOBI is a multi-tool able to mix, attenuate, invert, display and multiply any kind of signal. Knobi can serve a wide range of purposes thanks to its internal signal path that makes use of some of the most useful building blocks of analog synthesis: a 4-channel mixer, a three-range offset, an attenuverter, a fixed manual gate and lastly a cascading multiple derived from the output stage of Agogô.a, b, c and d are Knobi’s inputs while r is a fixed 5v reference output. The toggle switch next to d sets the range of the offset - the big knob below the meter. Connect a signal into one of the inputs to visualize its voltage value in the three digits meter. Keep in mind that this reading happens post offset and attenuverter - the smaller knob with (-) and (+) indications.The pushbutton next to x4 adds a gate of 5v to the mix: with no input connected it will act as a manual gate output. Autopatch the r reference output into one of the inputs to use Knobi as a macro controller thanks the offset knob and switch to set the range and the attenuverter.x1, x2, x3 and x4 are all cascading copies of the final signal path. Plugging a cable will break the normalization and the multiplication will reset starting from the next output. Four cables plugged in will output a copy at the same factor x1 - unity gain - making Knobi a versatile buffered multiple.Features:• Thermally compensated 5v voltage source with dedicated output.• Four channel mixer with four buffered output.• Built in 3 digits voltage meter post mix / attenuation / inversion.• Offset with a dedicated three positions range toggle.• Manual gate button tied to the mix.• 4 cascading outputs in an open design configuration.• Unique signal path: mix - attenuate - invert - add - visualize - multiplicate.• “Whatever” power connector a.k.a. don’t mind the polarity.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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KRONO is a clock and rhythm generator module offering 12 independent outputs split into two groups, packed with 10 versatile modes ranging from Euclidean to chaotic rhythms. Designed for creative timing control, it features weighted tap tempo, external sync, state persistence across power cycles and a unique swap function for inverting output group behavior. With visual feedback LEDs, fixed base clock outputs, USB-C programming, and open-source firmware, KRONO is a flexible and inspiring tool for rhythmic experimentation.Features:• 12 Clock Outputs divided into two groups (A/B)• 10 Operational Modes covering standard, mathematical, musical, probabilistic, and chaotic rhythms.• Weighted Tap Tempo & External Sync• State Persistence: Saves Tempo, Active Mode, and Swap State for each mode, retaining them across power cycles.• Calculation Swap: Inverts functions between groups via the MOD button or external gate.• Visual Feedback: the Status LED indicates the active mode; the Auxiliary LED signals state changes (tap, mode select, swap).• Fixed Base Clock Outputs: Outputs 1A and 1B always provide the unmodified main clock.• Hardware Platform: Based on CPU STM32F411.• Open Source: Firmware developed with PlatformIO (C/C++), customizable.• Programming: Via USB-C DFU.• “whatever” power connector – don’t mind the polarity, it’s protected eighter way.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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NEXUM is a smart eurorack multi-cable tester.Plug a cable in one of the sockets and the other end specularly on the opposite side. Check if the blue LEDs light up steady in a number equal to the cores of the cable you are testing. Wiggle the wire back and forth just to be sure that all the individual cores are firmly connected.Due to its configuration, the connection is considered true only if there is no continuity between the adjacent wires or discontinuity in that specific core. This smart feature will avoid false positives.Features:• Universal eurorack power cable tester - 10 and 16 pins 2.54mm.• Mono and stereo patch cable compatibility - 3.5mm TS and TRS.• Additional 20 pins 1.27mm / 2.00mm sockets.• Power line indicators.• Single board design - extremely skiff friendly.• “Whatever” power connector a.k.a. don’t mind the polarity.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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ROSA is a multi-mode crossfader, scanner, and switcher that allows seamless morphing between up to four inputs and outputs. With its three operating modes (Scan, Wave, and Pass), you can easily shape and route signals to fit any patch.Features:• Scan Mode: Morph between up to four inputs with adjustable curves using the KNEE control.• Wave Mode: Independently control the four VCAs for complex dynamic changes.• Pass Mode: Route a single input (or mix multiple inputs) to up to four outputs, perfect for quadraphonic setups or parallel processing.• Infinite Analogue Potentiometer: For smooth, continuous transitions.• Global SHUT Control: CV-controlled mute for immediate silence.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
SINGOLI is a 7 channel DC coupled active combiner with an analogue transient detector output.All the inputs I are equipped with LED meters and a dedicated attenuating potentiometer.O will give you the combined mixed output.T is an additional transient detector out that will fire only when a certain threshold is detected from the sum of all the inputs.The toggle switch activates or deactivate the internal connection to Tutto&Sempre when the two modules are paired together thanks to the included JST cable.Features:• DC coupled mixer with 7 inputs and individual attenuators.• Intensity sensitive LED meters on all the inputs.• Analogue transient detector output.• Toggle switch to activate / deactivate its normalization to Tutto&Sempre.• “Whatever” power connector a.k.a. don’t mind the polarity.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
Avalanche Chaotic Oscillator. Black panel version.TABØR is a rhythmic analogue sound and CV source based on the unpredictability of four avalanche transistors oscillators in a continuous oscillation state. These unpredictable core oscillators are related to each other and their charge and discharge cycle creates complex rhythmic textures that can be controlled and triggered with external CV inputs to add more contamination.Features:• Four avalanche oscillators with frequency pulse and cross-modulation controls.• CV inputs on all the parameters.• Starve input to restrict the amount of power supplied to the oscillators.• Color-coded LEDs to provide clear visual reference for the state of each oscillator.• Three outputs: TR for gates, NM for audio, and ZZ for a smoothed fuzz output.• Reverse power protection.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
Avalanche Chaotic Oscillator. White panel version.TABØR is a rhythmic analogue sound and CV source based on the unpredictability of four avalanche transistors oscillators in a continuous oscillation state. These unpredictable core oscillators are related to each other and their charge and discharge cycle creates complex rhythmic textures that can be controlled and triggered with external CV inputs to add more contamination.Features:• Four avalanche oscillators with frequency pulse and cross-modulation controls.• CV inputs on all the parameters.• Starve input to restrict the amount of power supplied to the oscillators.• Color-coded LEDs to provide clear visual reference for the state of each oscillator.• Three outputs: TR for gates, NM for audio, and ZZ for a smoothed fuzz output.• Reverse power protection.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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TUTTO&SEMPRE is a stereo performance mixer with 4 channel strips, an active patchbay, individual VCAs, clickless mutes, individual post attenuation direct outs, a main balanced stereo output and two high fidelity headphones drivers with switchable stereo inserts.Features:• Four channel stereo performance mixer.• Signal path optimized for the integration between modular systems and outboards.• Versatile mixing frame with an active patchbay, stereo attenuators, paired VCAs and clickless mutes.• Line level balanced L and R output + combined stereo with master auxiliary input.• Two independent headphones drivers with switchable individual stereo preview input.• “Whatever” power connector a.k.a. don’t mind the polarity.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
Test 3 is a purpose-designed 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...Note: Test 3 is available as a (very easy) do-it-yourself project, requiring some soldering and basic tools. It can be built either as a standalone circuit board with the DIY Kit, or as a Eurorack module with both the DIY Kit and Front Panel Kit. Most dealers bundle both kits together. With just 11 components to solder, this is a perfect synth DIY beginner project!Features:• Measures up to 20 V and 1 A on each Eurorack power rail, including +5 V.• 20 mV resolution voltage measurement, 1 mA resolution current measurement.• Peak current values of all rails are continually updated.• Pre-soldered SMD parts: perfect DIY project for beginners.• Precision-milled 2 mm anodised aluminium front panel with high-resolution, non-erasable graphics (module version).• Bullet-proof design: polarised power headers and MOSFET protection circuit.• Includes 16-to-16-pin Eurorack power ribbon cable.• Premium mounting hardware: black screws, black plastic washers and matching hex key (module version).• High-quality components and assembly; designed and made in Belgium.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
A 4-pole multimode filter based on the SSI2140 integrated circuit. Essentially an updated version of the classic SSM2040, the new SSI2140 adds better temperature compensation and a VCA that helps eliminate low frequency damping at high resonance settings. Besides the obligatory 4-pole low pass, MACA adds both 2-pole low pass and 4-pole band pass outputs. There is also an input level control that allows you to easily overdrive the filter core.Features:• 4-pole LP, 2-pole LP, & 4-pole BP outputs• Input level control• 16hz-16khz range• "Q" CV input• Inverting attenuator on "FM" input• "V/oct" CV input• Sine wave oscillator at high "Q" settings• Reverse power polarity protectionDIY-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
An analogue oscillator with through-zero phase modulation. The core of the T-ZED is the SSI2130 integrated circuit. Voltage controlled wave shape and phase modulation index allow for automated sonic versatility, and 2 separate frequency ranges mean the T-ZED can be used as an audio or CV source.Features:• Simultaneous SINE, TRIANGLE, SAW, SQUARE, and variable SHAPE outputs• Phase MOD input with bipolar INDEX circuit• V/OCT input tracks 10 octaves• FREQ spans 10 octaves, TUNE spans 1 octave• Hard SYNC input• SHAPE output (Sine to Triangle to Saw) with CV input and attenuator• Frequency range HI: 10hz-25khz• Frequency range LO: 0,1hz-200hz• Reverse power polarity protectionDIY-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.
available
Use this adaptor for connecting symmetrical or asymmetrical sources with XLR connector to the input of LeafAudio's Field Amp.As the Field Amp does not feature symmetrical input or outputs, this adaptor is actually asymmetrical (XLR pins 1 and 3 bridged according to the standards).Features:• Asymmetrical XLR female to 3,5mm (1/8") mono jack• HiCon XLR connector female• Amphenol 3,5mm (1/8") mono jack• Sommer Cable Onyx Tynee cable material• Length: ~35cm tip to tip
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The ATT Passive Attenuator is a simple 2 channel attenuator that can be used to attenuate audio or CV signals. For example to level the volume of two audio signals or to limit modulation signals. This DIY kit is very beginner friendly.Passive module, no power required.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 ATT Passive Attenuator is a simple 2 channel attenuator that can be used to attenuate audio or CV signals. For example to level the volume of two audio signals or to limit modulation signals. This DIY kit is very beginner friendly.Passive module, no power required.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.
available
This is the new 2025 contact mic version. Update June 2026: A magnetic ring is now included, as it was a highly requested feature. Our Contact Mic is now magnetic!With a contact microphone, any surface or object becomes a canvas for sonic exploration. Unlike traditional recording methods that capture sound waves traveling through air, contact microphones pick up vibrations directly from materials – allowing you to "listen" to objects, plants, or even soil from the inside out. This unique perspective unlocks a world of intriguing and sometimes abstract sounds, making it an essential tool for experimental recording and sound design. The 2025 edition of LeafAudio’s popular contact microphone has been completely re-engineered for maximum flexibility and features full electrical shielding for optimal performance.This upgraded model comes in a set with a durable neoprene zip-bag, ensuring safe transport while providing space for all included accessories. Thanks to its universal clamp mechanism and strong rubber bands, it can be mounted on almost any surface. Additionally, the newly developed probe mechanism — created in collaboration with sound designer Robert Dudzic — lets you capture sounds even from inside objects, soil, and more, expanding the creative possibilities even further.Equipped with a high-quality 2m (6.5ft) SC-Onyx Tynee cable by Sommer Cable, the microphone is available in two versions: one with a 3.5mm (1/8") Amphenol connector and another with a 6.3mm (1/4") Hicon connector. Includes:• Contact microphone• Magnetic ring• Neoprene zip-bag• Universal holder• Probe mechanism• 2 rubber bands• Allen key
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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. https://www.modulargrid.net/e/leafaudio-exp-1Check buttons below for a build video about VCO-1 and EXP-1 by Synth DIY guy. Very nice to watch before you build it, specially for beginners. And make sure to check the Soundcloud audio demos - they're good!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 OutputThe frontpanel was designed by Hannes Pasqualini / Papernoise.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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Field Amp is LeafAudio's solution for the world of body sound transmission: recording the world with contact microphones. It provides high-gain, noise-free amplification and impedance conversion to ensure the best possible sound quality from your contact mics.After releasing our Microphonic Soundbox, the team of LeafAudio quickly realized they’d hit a sweet spot. Many sound designers praised its clean, noise-free amplification – even if they didn’t need the Soundbox itself. So they created a standalone solution: the Field Amp. If you want the Soundbox amp without the box, the Field Amp is your new best friend. Perfect for studio work, field recording, sound installations and creative sound design of all kinds.Quality amplification & power management circuitry. No noise or beeping can be heard or seen in the spectrum, not even above the hearing range, which would come into focus later during sound manipulation processes. You can record with high sampling rates, transpose the audio by a lot and enjoy your pure sound. Just the clear, pristine audio you want to capture with your contact microphones.Optimised for travelling. The small unit is fully portable, light, offers many mounting possibilities. A professional case is included, which also can carry your contact mics, batteries and cables.Body sound transmission vs. airborne sound. We’re used to hearing the world the way our ears do—through air. Sound travels through the air before reaching our eardrums or a microphone. But with contact microphones, you change that perspective. Instead of hearing the surface of materials, you hear from within them. This shift opens up a powerful trick for sound design. It reveals a hidden world of textures and tones that are normally out of reach. Give it a try—there’s an entire universe of sound waiting to be discovered.Field Amp is optimised for Hi-Z signals of contact microphones. It also acts as an impedance converter with a powerful output signal. No loss of signal quality when you keep the wiring short between microphones and the input. The output is a strong signal and you don't have to worry about a few meters of cable.We recommend using the shielded contact microphones by LeafAudio. Generally you can try contact mics with our pre-amp, hydrophones, or guitar pickups. We offer separate adapters for both input and output to ensure compatibility with all your devices.Features:• Low-Noise pre-amp for contact microphones• Case included• 9V DC power supply or battery• USB-C to barrel connector adapter cable included• Up to ~50x adjustable gain• 1 mono input• 2 mono outputs (one -12 dB)• All connections 3.5 mm (1/8") mono jack• Input impedance: 3,3M Ohm• Output impedance: 1k Ohm• 12 x 12 x 3.4 cm• 410 g (incl. case & USB-C to barrel cable)• 1/4"-UNC mount on top and bottom for camera tripods etc.
sold out at the moment
The FPF Fixed Passive Filter is a simple utility filter with fixed cutoff frequencies for Highpass, Lowpass and Bandpass. If you want to roll off the high frequencies or eliminate some rumble on synth sounds it does a pretty good job cleaning up signals. It is a simple passive RC filter combination and therefore causes a little loudness drop on your signal. This DIY kit is very beginner friendly.Passive module, no power required.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 FPF Fixed Passive Filter is a simple utility filter with fixed cutoff frequencies for Highpass, Lowpass and Bandpass. If you want to roll off the high frequencies or eliminate some rumble on synth sounds it does a pretty good job cleaning up signals. It is a simple passive RC filter combination and therefore causes a little loudness drop on your signal. This DIY kit is very beginner friendly.Passive module, no power required.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
Knapplåda is a DIY case with 104 HP space for your modules, a busboard with 16 bus-connectors and ~1 Ampere on +12V, -12V and +5V. The cover also acts as a stand, so you have your modules placed in a nice angle in front of you.It is your perfect entry into the modular world without spending much cash on power supply and case. Who did some research on that topics knows that it quickly gets complicated and expensive. Our answer: just get an all-in-one solution and focus on music instead of tech stuff! Here is Knapplåda!The DIY kit includes all materials you need to build the case. On top of that you will need some tools. You need solder- and woodworking skills. We think it will take around one or two evenings to build it for most of you. Please make sure to check the building instructions before you buy the kit. We put a lot of effort in this project and we hope you like it!Features:• 104 HP• Including busboard & power supply• Cover/stand included• Slide nuts or threaded strips (M3) can be inserted from the side• ~1 Ampere each on +12V/ -12V/ +5V• Find more specs in the manualDIY-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.