DIY Kits
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The IOU (Invert Offset Utility) is a powerful 2HP tool for shaping control voltages and audio signals with accuracy. It features an attenuverter and a responsive slider to dial in up to +5V of offset—ideal for fine-tuning signals in both performance and studio settings.A standout function, inspired by DivKid, lets users switch the offset point to either pre or post attenuverter. This enables more refined control when crafting detailed offsets across the full slider range.For added flexibility, IOU includes a selectable gain switch (1x or 2x), allowing for signal boosting or expanding the offset range up to +10V.With both normal and inverted outputs, IOU excels at tasks like voltage scaling, inversion, and generating custom CVs—perfect for techniques such as sidechain-style modulation. A must-have utility for any Eurorack system aiming for precision and creative depth.Features:• Low Output Impedance (0.5 Ohm): Ensures a high damping factor for precise control and outstanding low-frequency performance• Universal Headphone Compatibility: Supports a wide impedance range from 16 to 600 Ohms• Multi-Stage Low Noise Design: Delivers low distortion and high stability for accurate, true-to-source audio reproduction• High Output Current (up to 140 mA): Capable of driving power-hungry headphones up to 600 Ohms with ease• Visual Feedback: Dual 8-segment LED program level meters for monitoring input signal levels• Output Flexibility: One output can be used to drive monitor speakers (using a Y-splitter)• Full-Spectrum Audio Fidelity: Offers a 20 Hz to 20 kHz frequency response for complete audio coverage• Protection Features: Includes comprehensive RF and DC input protection and resettable fuses for short-circuit output safetyDIY-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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Developed with DivKid, Manic is a compact 8HP dual VCA module built for advanced sound sculpting. It supports mono, dual mono, or true stereo workflows with precision linear VCAs and selectable unipolar or bipolar response—ideal for amplitude shaping or ring modulation.Each channel features a dedicated post-VCA shaping stage:Shape1 delivers TanH soft clipping and classic Serge-style wavefolding.Shape2 adds hard clipping and a Buchla-inspired wavefolder.The asymmetrical design between channels creates rich, animated stereo effects from mono or stereo sources—perfect for depth and width in modular mixes.Optimized for both CV and audio, Manic is a performance-ready tool that brings hands-on control, creative modulation, and stereo imaging into any Eurorack setup.Features:• A collaborative design from both DivKid & Apollo View Modular• Selectable unipolar or bipolar VCA circuitry per channel• Three distinct shape outputs per channel: Inverted, Clipped, and Wavefolding• TanH soft clipping & hard clipping• Serge style wavefolding & Buchla style wavefolding• Stereo operation with perfectly matched gains for the clipping and wavefolding circuits, creating a stunning stereo widening effect• DC-coupled signal path for processing both audio and CV signals• Input and modulation normalisations for simple mono to stereo operation• Flexible signal flow allows for creative combinations, such as ring modulation into clipping or wavefoldingDIY-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
Rabbit Hole is a 16HP summing mixer that blends solid-state precision with rich tube character. Featuring two input channels with independent vintage VCAs, it routes signals through a drive stage for solid-state clipping, followed by a starved cathode dual-triode vacuum tube for saturated warmth and harmonic distortion. An optional OWTH diode LED clipping circuit adds aggressive, dynamic edge.Features:• 2 channel mixer with vintage character OTA per input VCAs• 12AU7 Vacuum Tube Core• Fat sounding all analogue signal path• 4 possible stages of distortion• Tone shaping with CV control• Dry/Wet Mix with CV control• Feedback with CV control• Attenuverters on all CV inputs• Switchable diode clipping circuit “OWTH - Off With Their Heads”• “L8” Switch to change Tube characterDIY-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
cDVCA or class-D VCA is a new kind of VCA based on an entirely novel concept that is inspired from class-D amplification technology. This is not a transparent VCA and brings a lot of character to the sound.The first VCA that tracks 1V/octConcept: The input signal is turned into an ultrasonic PWM signal (~34kHz). The PWM is scaled to the desired amplitude and then filtered back down to the original signal.The twist: The PWM frequency can be lowered down into the audio spectrum and the frequency can be controlled via its 1V/oct input allowing for crazy waveshaping that tracks your melodies.The drive controls an innovative clipping method that does not rely on overdriving any circuitry and therefore results in distortions with a very defined character.The signal then goes into a 1 pole VCF/tone circuit that allows to keep things under some amount of control as the harmonics produced by this module can be very aggressive.With no input the module generates a simple square wave and therefore can be used a simple synth voice (VCO→VCA-VCF)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
cDVCA or class-D VCA is a new kind of VCA based on an entirely novel concept that is inspired from class-D amplification technology. This is not a transparent VCA and brings a lot of character to the sound.The first VCA that tracks 1V/octConcept: The input signal is turned into an ultrasonic PWM signal (~34kHz). The PWM is scaled to the desired amplitude and then filtered back down to the original signal.The twist: The PWM frequency can be lowered down into the audio spectrum and the frequency can be controlled via its 1V/oct input allowing for crazy waveshaping that tracks your melodies.The drive controls an innovative clipping method that does not rely on overdriving any circuitry and therefore results in distortions with a very defined character.The signal then goes into a 1 pole VCF/tone circuit that allows to keep things under some amount of control as the harmonics produced by this module can be very aggressive.With no input the module generates a simple square wave and therefore can be used a simple synth voice (VCO→VCA-VCF)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
Introducing our innovative Complex Low Frequency Oscillator (cLFO) - The cLFO is an instrument for those who believe in pushing the limits of modulation. Featuring two CV-controlled LFOs that intricately intermodulate and are seamlessly integrated with a ring modulator, this module elevates your synthesis and sound design to unprecedented levels.Crafted with a focus on cross and self-patching, the cLFO invites you to explore the endless possibilities of modulation. Dive into creating continuously variable waveforms, exponential shapes, bouncing ball effects, immersive stereo soundscapes and many other sonic wonders!Each LFO outputs Triangle, Saw, and Square waves. The Triangle output of LFO1 is normalled to the CV input of LFO2 with attenuation. The addition of a ring modulator to this setup draws from years of the designer's own experimental projects. It is an invitation to experiment with effects traditionally reserved for audio in the realm of modulation. A ring modulated LFO delivers the rhythmical essence of a conventional LFOs but with an added complexity and variability that ensures your soundscapes are always evolving.This module offers an expansive modulation frequency range, with speed adjustments from as slow as 2 minutes per cycle to as fast as 20 cycles per second. With CV control, frequencies can stretch from 13 hours per cycle to 400 cycles per second, ensuring unparalleled versatility in your modulation explorations.Accompanying the cLFO is a detailed manual filled with lots of patch idea designed to elevate your sound design skills to new levels.Dive into the world of advanced modulation manipulation with cLFO.Stay inspired! Stay innovative!Features:• Two analog LFOs• Control voltage over LFO frequency• 3 waveform outputs per LFO: Triangle, Square and Sawtooth (LFO1 - ramp down; LFO2 ramp up)• Wide frequency range: 2 minutes - 0.05s (20Hz) without CV and 13 hours to 400Hz with CV• Ring Modulator (aka four quadrant multiplier aka bipolar VCA)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
NO DIY – THIS UNIT IS FULLY ASSEMBLEDFaderpunk is a modular, customizable modulation ecosystem for Eurorack and semi-modular setups. Built around six tactile faders and channelized app-driven firmware, Faderpunk turns empty jacks into dynamic modulation sources, MIDI bridges and performance tools. Run multiple apps at once – LFOs, sequencers, envelopes, quantizers, Turing machines, CV-to-MIDI and MIDI-to-CV converters, random generators and rhythm engines – then reconfigure the system instantly with the web-based app manager. Deep integration with MIDI and CV means Faderpunk speaks both languages fluently, letting you combine hardware and software workflows to create hybrid modulation rigs that are playable, programmable and uniquely yours.A browser configurator (connect Faderpunk to a computer and visit the web interface) makes app management drag-and-drop simple, while a developer-friendly API lets you build custom apps and extend the platform. Physical customization includes a set of stickers for control labelling and configurable RGB LEDs for visual feedback, giving you immediate, readable state information during performance. Compact, hands-on and open, Faderpunk is a versatile modulation hub for live rigs, studios and DIY instrument projects.Features:• Modulation platform: run LFOs, sequencers, envelopes, randomizers, quantizers, Turing machines and more.• Hybrid MIDI + CV workflows: MIDI-to-CV and CV-to-MIDI bridging for seamless hardware/software integration.• 16 channels comprised of: CV jack configurable as Input or Output (0-5V, 0-10V or +/-5V range) and a Mechanical RGB backlit button • Web-based configurator with drag-and-drop app management (connect device to your computer to access).• Developer API for creating custom apps and extending functionality.• Configurable RGB LEDs for clear visual feedback and live performance cues.• Sticker set for personalized control labeling and ergonomic mapping.• Ideal as a modulation source, sequencer, MIDI bridge or performance controller in Eurorack and semi-modular systems.
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The AtoVproject Gaeto is a new type of clocked logic module. Gaeto is a great module to play around with triggers, gates and legatoes turning one into the other. As a result we decided to name the module Gaeto from “Gate” and “Legato”.The Gaeto’s function is to perform the following operation:“If the signal on the data input has been high, then the output is high at the next clock. If not - the non-output is high.”In other words, if the signal on the input signal goes over 1V then the memory stores a 1 if not it stores a 0. At the next clock the output will be high if a 1 was stored and the non output will be high if a 0 was stored.The output is coupled with an AND gate that allows for the outputs to either follow the pulse width of the clock or be maintained high until the next clock. This function is also CV controllable for interesting rhythm modulations.This rather obscure function allows for an extremely wide range of uses. This is a module that rewards exploration.Additionally, multiple Gaetos can be chained together using the included cable to create shift register functions.This design relies on CMOS CD4000 series ICs (4013 and 4081). These were selected for their reliability, high speed and low power consumption.Features:• /2 /3 Clock divider• Legato generator• Trigger to gate converter• Rhythm quantizer• Sub octave generator with PWM• Generative trigger sequenceDIY-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 AtoVproject Gaeto is a new type of clocked logic module. Gaeto is a great module to play around with triggers, gates and legatoes turning one into the other. As a result we decided to name the module Gaeto from “Gate” and “Legato”.The Gaeto’s function is to perform the following operation:“If the signal on the data input has been high, then the output is high at the next clock. If not - the non-output is high.”In other words, if the signal on the input signal goes over 1V then the memory stores a 1 if not it stores a 0. At the next clock the output will be high if a 1 was stored and the non output will be high if a 0 was stored.The output is coupled with an AND gate that allows for the outputs to either follow the pulse width of the clock or be maintained high until the next clock. This function is also CV controllable for interesting rhythm modulations.This rather obscure function allows for an extremely wide range of uses. This is a module that rewards exploration.Additionally, multiple Gaetos can be chained together using the included cable to create shift register functions.This design relies on CMOS CD4000 series ICs (4013 and 4081). These were selected for their reliability, high speed and low power consumption.Features:• /2 /3 Clock divider• Legato generator• Trigger to gate converter• Rhythm quantizer• Sub octave generator with PWM• Generative trigger sequenceDIY-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 AtoVproject lx-euclid is a 4-channel trigger sequencer with a standout feature: two touch-sensitive rings that redefine hands-on control. These rings, paired with full color circular display, offer an unparalleled, intuitive interface designed for fast, real-time performance. The touch rings make it incredibly easy to interact with your sequences, allowing you to apply mutes, fills, and resets on the fly. This immediate tactile response puts creative control directly at your fingertips, making it perfect for both live improvisation and studio work.In addition to its touch-sensitive rings, the lx-euclid boasts 4 assignable CV inputs, probability settings, and 8 save slots, offering endless possibilities for pattern creation and variation. The module also introduces new twists on traditional Euclidean rhythms, with Exponential, Inverse Exponential, and Mirrored Exponential algorithms for even more flexibility and evolving beats. Whether you're looking to unlock new creative possibilities or elevate your live set, the lx-euclid’s touch rings bring a whole new level of expression to your modular rig.Features:• Four trigger sequencers • Two touch capacitive rings• Performance macro (Mute, Fill, Reset, etc)• 4 fully assignable CV inputs (+/-5V input range)• 4 rhythm generative algorithms• 8 save slotsDIY-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
Expand the power of your modulations with the MMx2, a dual-pack module designed to bring flexibility and creativity into your system. Each MMx2 package contains a pair of MM modules.Sold as a pair, MM modules can function as two separate units or be linked for expanded matrix mixing capabilities. Connect even more MM modules to increase the power of your Eurorack synthesiser!Every MM module has attenuator on the first two inputs and attenuverters on the last two and the MM modules amplify the mixed output by 2.The MMx2 merges essential utilities into one powerful package, offering a CV mixer, attenuverters, signal amplification, offset generator, and a multiple, all in a compact form. Ideal for distributing modulations, creating complex mixers, generating stereo effects, and much more.The MMx2 is a testament to AtoVproject's dedication to creating instruments that allow you to express yourself and reward your understanding and exploration. To facilitate this, the MMx2 comes with a detailed manual full of inspirational patch ideas that will take your sound design to the next level.Dive into the world of advanced modulation manipulation with MMx2.Stay inspired! Stay innovative!Features:• Sold as a pair• 4 in 1 DC Mixer• Multiple MMs can be combined into a matrix mixer• Optimized for CV - Audio compatible• Input 1 and 2 have attenuators• Input 3 and 4 have attenuverters (polarizers)• Input 1 to 3 can be chained to the next module Input 4 is normalled to a voltage source so it can be used as offset controlDIY-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 2025 version! A*B+C is the ultimate utility for audio and control voltage. It performs multiplication, addition, and attenuation, providing a simple way to create complex signal interactions and timbres.It is formed by two channels, each of which takes two input signals (A and B), multiplies them (A × B), and then adds a third signal (C) to the result.It is formed by two channels, each of which takes two input signals (A and B), multiplies them (A × B), and then adds a third signal (C) to the result.Features:• DC Coupled• Signal LED Indicators• B and C INs normalled to 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.
sold out at the moment
- - - - Discontinued - - - -AC/DC is a class-compliant DC coupled audio interface in Eurorack format. With its 6 HP, it is perfect for live performance and travel Rigs.Based on Rebel Technology OWL platform, It allows sending and receiving both CV and Audio at 16 Bits 48 kHz. as well as load patches from Rebel’s library.It is compatible with all popular DAW and CV generators, and also as an audio and CV processor for iOS apps.Features:• Class-compliant audio interface• DC coupled with range -10 to 10 V• Level meters and clip LEDs• 48 Khz 16 Bit• Compatible with OWL platform• Stm32H7 processor with 32 Mb of RAMDIY-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
ARK combines sequencing, sound generation, sampling, modulation and mixing in a two-part Eurorack system. Its 16-track composition environment brings internal instruments and CV/Gate generation together with flexible audio, CV and MIDI routing, while scale- and chord-based tools help keep generated musical material in harmonic context.Features:• 16-track deterministic, stochastic and Euclidean sequencer• Per-track sound engines, samplers and CV/Gate generators• Harmony tools based on scales and chord progressions• 16 internal modulation sources• MIDI generation, recording and parameter control• Internal mixer with effects and master dynamics• 8 CV/audio outputs and 8 gate outputs• Detachable ARK-Core and ARK-Controller for flexible placement
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Atte scales and distributes audio or control voltages using four independently adjustable channels. Cascaded inputs also let one source feed several outputs at different levels.Features:• Individual polarity switches• Output LEDs show level and polarity• Normalled inputs for signal distribution and offset generation• Width [HP]: 4• Depth [mm]: 35• Format: 3U• Current draw +12 V [mA]: 60• Current draw -12 V [mA]: 50• Panel / Color: Black Alu• DIY Level: Easy/MediumDIY-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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Bandit is a spectral processing playground. It's a fun combination of band-pass filters, VCAs, and routing options. It serves multiple functions including equalizer, crossover, multiband VCA, 4 band spectral mixer, and spectral external FX insert point.Features:• Four Band CV controllable EQ• Individual inputs per Band• Return inputs• Level and Peak LEDsDIY-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
The BF-22 VCF is a dual Hi/Low-pass filter inspired by the Sallen-Key filter from the early MS-20.DISCLAIMER: This filter brings to your modular system the character of early MS-20 sound: Kick-ass-rocking-dirty screams! It inherited not only it’s amazing sound, also MS-20 noise floor. If noise floor is an issue for you, this might not be your filter.Features:• Dual-channel Sallen-Key Filter. Inspired by the early MS-20• High and Lowpass operation.• Two CV inputs per channel with a dedicated attenuverter for the first one.• CV controlled resonance.• The first channel can be linked to the second one with the “Link” switch.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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Burst is a trigger processor and generator, designed to add an organic chain of events to your modular setup. You can see it like “Trigger Activated Trigger Burst”. Each time it is activated, either manually or with an external trigger, a given amount of triggers are generated. You can control Time Division, Distribution, Quantity, and Probability of the bursts.• With Burst synced to your tempo, you can create all kind of ratcheting effects and multiplications leading to doubles, triplets, quintuplets, and true Poly Rhythms for your modular system.• With very short time windows, Burst can help to synthesize fast repeating transients for “hand-clap like” sounds or modern drum hits.• Working in Cycle Mode, is also an excellent master clock with tap tempo functionality, and is able to achieve non linear distributed clocks.Features:• Custom trigger bursts up to 64 triggers.• Voltage Control burst Quantity with dedicated attenuator.• One Shot and Cycle play modes activated via manual controls or dedicated Trig Input.• Pingable clock input.• Voltage Control burst Distribution, Time Division and Probability.• Tempo and End of Cycle individual outputs for sync other 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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Chopping kinky is a voltage controllable, dual channel wavefolder.As an unique feature it has a chop out that will choose between both channels with a zero cross detector or an external gate.• A wavefolder converts simple signals into richer and more dynamically changing ones. In contrast to a filter, wave folding adds harmonic content to the waveform. It works by amplifying the waveform until it begins to saturate, then rather than clipping, the waveform gets folded back in on itself.• Each of the module’s two channels has a unique wave folding profile. At each input, there are two CV inputs for controlling the level of waveshaping including one that passes through an attenueverter.• Chopping Kinky is DC coupled allowing it to be used for both CV and audio duties; to generate harmonics on an audio signal or kinking LFOs and envelopes.Features:• Two unique wavefolder circuits• Two CV inputs per channel, one with attenuverter.• DC Coupled inputs allowing CV signals.• Chop out with zero cross detector.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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Crush Delay v3 is a special Echo-Delay unit based on the PT2399 IC, which is able to offer 400ms of clean delay and up to 2 seconds of dirty repetitions, having a special talent to generate noisy-glitch textures. This third version comes with some interesting new features like redesigned VCAs circuits, wider range for clean delay and reduced depth to make it skiff friendly.• The module has two inputs (In and Return) that go to the Delay circuit through a dedicated VCA for each one. The main difference between both inputs is the signal fed into In is going to the Dry/Wet circuit also, not only to the Delay, allowing you to control the balance between the original and the processed signal present at the main output (Out).• The signal is processed by the Delay circuit, which is affected by the Crush section. It degrades the signal at slow rates in different ways, depending on the position of the three Crush switches or by the presence of gate signals at the Crush inputs.• After being processed, the signal is routed to three different paths. The first one goes into Dry/Wet, where it’s mixed with the original input signal (In) before going to the main output (Out). The second one is returned to the Delay circuit through another VCA (Feedback), controlling the number of repetitions of the wet signal. Finally, the last one goes directly to the Send output.Features:• Input signal controlled by VCA’s• Bigger range of clean delay• Three different Crush Modifiers based on circuit bending techniques.• VC Feedback wit automatic gain controlDIY-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.