VCF
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The Arkarion is a full-featured analog synthesizer voice in Eurorack format, designed for creative exploration and dynamic signal flow. Combining the warmth of analog circuitry with a digitally controlled internal routing system, Arkarion offers a unique blend of structure and unpredictability. It's an expressive, performance-ready instrument for musicians seeking deep modulation, generative possibilities, and hands-on control.At the core of Arkarion lies a digitally interpreted “DNA patch system” — a signal-routing framework inspired by genetic code. This system unlocks over 65,000 modulation and audio paths, allowing for rich, morphing textures that evolve at the press of a button or incoming gate.Features:• Complete analog synthesizer voice with digital routing control• 2 analog VCOs with selectable waveforms• MIDI input with pitch CV and gate outputs• Envelope generator with rise/fall stages, loop and gated loop modes• 2 CV-controllable LFOs for versatile modulation• Gate-triggered random voltage source• Multimode filter: lowpass, bandpass, highpass, allpass (switchable)• Tape-style analog delay with CV control• Digitally controlled “Gene Modification” knob for live routing mutation• 16-bit routing architecture: 65,536 possible patch configurations• 64 patch memory slots (8 banks of 8 presets)• Internal VCAs for modulation depth control• Randomize routing via button or external gate input• LED indicators visualize current patch structure and modulation pathsDIY-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 CubuSynth Dual CS-20 VCF is a versatile module that combines two 12db filter cores in a dual/stereo configuration. It is inspired by the iconic Korg MS-20 synthesizer, offering similar sound characteristics while the resonance can be pushed even further.The module provides multiple filter modes, including low pass and high pass, which can be blended together to create a diverse range of filter responses. This allows you to shape your audio signal in various ways, from smooth and warm low pass filtering to more aggressive high pass filtering.One of the standout features of the CS-20 VCF is its self-oscillating resonance capability. When the resonance is turned up, the filter produces a sine wave that can be used as an additional sound source. This feature adds to the versatility of the module, allowing you to create complex and evolving sounds and even cross-FM modulation possibilities.The frequency and resonance parameters can be controlled via control voltage (CV) inputs. The frequency CV input can be attenuverted, meaning it can both attenuate and invert the incoming CV signal. This gives you precise control over the modulation depth and direction for frequency modulation.The resonance CV input includes an attenuator, allowing you to adjust the modulation depth for the resonance parameter. This feature gives you the flexibility to add dynamic and expressive modulation to your sounds.Additionally, the CS-20 VCF provides a 1V/Oct input, which allows you to control the filter's frequency using a standard 1V/Oct control voltage. This input is stable over a range of at least 2 to 3 octaves, ensuring melodic tracking and integration with other modular synthesizer components.Overall, the CubuSynth Dual CS-20 VCF offers a powerful and flexible filtering solution with intuitive routing and modulation options. It is designed to inspire creativity and provide a wide range of sonic possibilities for your modular synthesizer setup.Features:• 2 individual Filter cores with common Frequency and Resonance controls• CV control over Frequency and Resonance for each Filter core• Self-oscillating Resonance with LED feedback circuit (visible on the Front)• 1 V/oct input, tracking over 2~3 octaves• Frequency Range: 22 Hz - 20 kHz• Blend between LP / HP Filter modes• Ability to use as 2 pole (12db) stereo HP/LP Filter, 4 pole (24db) mono LP/HP or a Band Pass (12db) Filter• Cross FM Modulation possibleDIY-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 CubuSynth VCFA is a multimode VCF with LP,HP and BP modes with integrated VCA, CV control over frequency, resonance and volume. The CV input for the frequency features 1V/Oct scaling over about 2~3 octaves. So you can even create plucky melodies with the resonance in "ringing" mode. The gain control can reach a nice, soft saturation.Features:• 3 simultaneous Outputs for Low Pass, Band Pass and High Pass• Integrated VCA at the input stage• CV control over volume, frequency and resonance• "Ringing" mode on upper resonance setting• 1 V/oct tracking over 2~3 octaves (with freq CV attenuator on 100%)• Saturation on incoming signal (VCA stage) on upper gain settingDIY-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 Multi-Mode Ladder (MML) Filter is a twist on the classic transistor ladder low pass filter by Dr. Robert A. Moog.This filter updates the classic 4-pole ladder design to provide Band Pass and High Pass filter responses as well as the traditional Low Pass filter,this module also adds CV control over the resonance as well as two frequency CV inputs.The circuit features a fully discrete transistor design with an op-amp buffered output, this allows soft saturation of the input signalto get the classic overdriven tones of the ladder filter. A bass compensation circuit has been included to retain the bass response in Low Pass modewhen the resonance is increased.The bass compensation also helps to improve the response of the High Pass filter.The bass compensation can be removed if the user wishes to have a more classic response (see mods section in build doc).Features:• Low Pass, Band Pass and High Pass modes.• CV controlled resonance.• Added low frequency compensation.• Soft saturation of input.• 2 x frequency CV inputs.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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Who doesn’t love a good resonant low pass VCF? It’s arguably the beating heart of any subtractive synth – adding character, dynamics, and a good deal of retro-futuristic oddness to your patches. That’s why a diode ladder VCF that sticks to super basic and widely available components was created. On top of that, the architecture is as approachable as possible by avoiding the tricky diff-pair setup classic ladder filters rely on.We – Erica Synths and Moritz Klein – have developed a series of educational DIY kits under the brand name mki x es.EDU with one specific goal in mind: to teach people with little-to-no prior experience how to design analog synthesizer circuits from scratch. What you’ll find in the box is not simply meant to be soldered together and then disappear in your rack. Instead, we want to take you through the circuit design process step by step, explaining every choice we’ve made and how it impacts the finished module.In total, we have developed 9 kits to build a fully-featured modular monosynth: a sequencer, a VCO, a wavefolder, a noise/S&H module, a mixer, a VCF, an Envelope generator, a dual VCA, and an output stereo mixer with a headphone amplifier. Additionally, an affordable eurorack case with a DIY PSU will also be available. While these kits are easy to build, we did not compromise on design and functionality. We will launch one kit every 4-6 weeks. For each kit, there is an extensive user manual (40+ pages; can be downloaded separately) that will dive deep into not only the electronics behind each circuit but also the fundamental principles of sound synthesis. We hope that the mki x es.EDU project will inspire future engineers and will contribute to the ever-growing diversity of electronic music technology.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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HI-FUSION is a remake of the classic Polyfusion from the 70s with some improvements.It is a low pass OTA VCF based on the well known LM13700 ic.We chose to make this circuit because it's v/oct stable, and the trimmers allow to calibrate it properly.It has a switch for 2 pole and 4 pole configuration, each with it's own character and timbre.This design produces nice sounding filter fm results.Features:This kit contains all the parts needed to build a complete HI-FUSION module.• 1 audio input: IN• 1 audio level pot: ATT• 3 cv inputs: FREQ(with attenuator), FREQ (for v/oct), RESO• 1 cv level pot: FREQ CV (attenuator for FREQ cv input)• 2 vcf control pots: FREQ (frequency) and RESO (resonance)• 1 configuration type switch: 2P and 4P (2pole or 4 pole)• 1 output: OUT• standard 10 pin euro power (+12V / -12V)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 JP8 VCF module is a versatile and authentic filter offering 2-pole (12 dB/oct) and 4-pole (24 dB/oct) low-pass modes, along with a high-pass filter. Built with AS3109D and AS662A ICs, WIMA polypropylene capacitors, and 2SK30ATM-GR J-FET transistors, it ensures high-quality performance.Key features include two mixed signal inputs, independent outputs for 2-pole and 4-pole modes, and an alternate output with selectable modes via a switch. CV inputs operate at 0-5Vpp, with attenuation available for 10Vpp signals through the CV1 pot.This module is a collaboration between Feedback Modules and CMS-LAB.Features:• AS3109D and AS662A, ALFA RPAR modern identical to the original IC clones• High Pass Filter made with AS662A• WIMA polypropylene capacitors• Selected 2SK30ATM-GR N-channel J-Fet transistor• Two mixed signal inputs• Independent outputs for 2-pole, 4-pole and an alternate output with selection of modes from a switch• The CVs are 0-5Vpp, 10Vpp CVs can be attenuated with the CV1 pot.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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Lazer Phazer it's at his core 2xSystem7xx phaser with a lot of addons.It can work as a stereo phaser, as a mono BI-Phaser, as two totally independent phasers, or as a 16stages phaser in series mode. Thath's not all, the LFOs of the phasers can work idendepently or linked. In inverted mode for stereo phase galore. The feedback can be modulated by internal LFOs, external CVs or both of them in the same time.Kits have 16 x 2SK30A fet transistors matched and selected from new old stock, so the retro sound it's totally there.This module is a collaboration between Feedback Modules and CMS-LAB.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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LO-FUSION is a remake of the classic Polyfusion from the 70s with some improvements. It is a low pass OTA VCF based on the well known LM13700 IC. We chose to make this circuit because it's v/oct stable, and the trimmers allow to calibrate it properly. It has a switch for 2 pole and 4 pole configuration, each with it's own character and timbre. This design produces nice sounding filter FM results.Features:• 1 audio input: IN• 1 audio level pot: ATT• 3 CV inputs: FREQ(with attenuator), FREQ (for v/oct), RESO• 1 CV level pot: FREQ CV (attenuator for FREQ cv input)• 2 VCF control pots: FREQ (frequency) and RESO ( resonance)• 1 configuration type switch: 2P and 4P (2pole or 4 pole)• 1 output: OUT• Standard 10 pin euro power (+12V / -12V)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 filter is based on the classic 2600 from the seventies and uses the LM3900 Norton opamp chip.It has an audio inputs, two CV ins and an audio out.You can control audio input level, CV levels, frequency cutoff and resonance.It has a beautiful sound and it can go from relatively clean to dirty and screamy depending on audio signal level and resonance.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 VCF from the famous British pin matrix synth released in 1969.The VCZIII series VCF is a result of the collaboration of Feedback modules and CMS-LAB and is a modern re-creation of those temperamental, organic and beautiful sounding VCF from 1969 but with enhancements and adaptations to the Eurorack needs of 21st century.Features:• AS394 ultra well-matched monolithic NPN transistor pair• selected and matched BC550 and BC560 transistor pairs• WIMA capacitors• selected 2N3819 FET transistor• two mixed signal inputs• the CVs are 0-5Vpp, 10Vpp CVs can be attenuated with the CV1 pot and RESO CV potDIY-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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Full featured, fully modular synthesiser for Eurorack with a pre-patched normalised signal path for quick setup.A combination of the XVCO TWO, Raging Bull 3.0 VCF/VCA, and System X Envelope, where each section can be used completely individually or as part of the larger whole.Onboard LFO for PWM and FM and Noise Source.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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Voltage controlled Filter Moog Taurus. Raging Bull is based on the legendary Moog Taurus Mk I VCF and VCA. It has a lovely, thick Moog-like quality, which is further enhanced by the drive you can get out of its VCA at higher settings.A big part of the sound of the Taurus was the way in which the VCF interfaced with the VCA, so on Raging Bull the VCA is always in the audio path. A toggle switch allows you to select ‘always open’ or CV control of the VCA from CV input 3.By sending an ADSR into CV3, the signal will go to the VCA CV input unattenuated and the VCF CV input via the attenuator 2. By sending a gate into CV3, and setting the attenuator to zero, the VCA can be gated while the gate has no affect on the VCF.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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Variable Roland style filter. Based on the Roland System 700 state variable filter module. Lowpass, bandpass and highpass outputs. A big part of the sound of the State 700 is the way in which resonance is reduced as the audio inputs are driven harder. It won’t self oscillate with a hot audio input, throttle back a little and you’ll get squelchy ear bleeding resonances!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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Whiteface is based on the legendary ARP4023 VCF module often found in the “whiteface” ARP Odyssey Mk1. I’ve engineered out the rare parts and the need for matched transistors for the CV input section by using a Roland-inspired circuit there instead, no change to the vibe though!The audio path remains pure ARP, with one exception – built as specified on the schematic, the resonance would clip in a way which is neither musical or desirable when set too high. I’ve come across a couple of other versions which have this ‘don’t turn it up past 8’ trait, but I went further and engineered that out – a single resistor value change. In Whiteface, the resonance is usable and musical over the entire range!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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Roland System 100M based VCF for Eurorack. Way back in the mists of time, I acquired a Roland System 100m, my first modular system. I’d used Roland synths of that era before, and what always stood out was the clarity and precision of the filters, clean and squelchy with searing resonance. My 100m boasted 3 filters, and had these qualities in spades. When I started out into Eurorack, it was this sound that I craved, but there was nothing quite like it available in the format, so I made my own. Soon, folks started knocking, asking me to build a Roland style filter module for them too. So, System X Filter was born, adding a 12dB output in addition to the regular 24dB output. This module has adapted and changed over the time we have been producing it, now renamed XCF TWO to sit alongside our XVCO TWO. I like to feel that the current version is the best of the lot!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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This is the DIY version of this unit.Solid Felt is a stereo multimode analog filter in desktop format.Its name comes from the etymology of the words “stereo” and “filter”.From subtle timbral variation to an all-encompassing sonic treatment, Solid Felt can be used in multiple ways to embellish or vandalize your sound bouquet:As two independent mono filtersto give a stereo treatment to a mono signalto filter a stereo signal at the same cutoff frequency on the L and R channelsAs a mono 24dB/oct filter (placing the two filters in series)To synthesize sounds, via external feedback patchingTo extrapolate a CV signal from your audio input and use it to control any of its parameter or external gearAs a stereo overdrive effectTo bring line level signals to Eurorack levelFeatures:• 2x Analog multimode analog filters• 2x 1/4″ jack high impedance inputs• 2x 1/4″ jack low impedance outputs• 8x 1/8″ jack eurorack compatible CV inputs• 8x 1/8″ jack eurorack compatible CV outputs• Input gain control to amplify incoming signals up to fuzzy territory• mode control to select between lowpass, bandpass and highpass filter response (CV controllable)• an envelope follower (normalled to input A) which is fed into a three stage clock divider• a voltage controlled LFO with waveform blend control and two outputs 180° out of phase• a voltage controlled LFO with rising and falling sawtooth outputsDIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled unit. The kit includes all parts to build the unit. 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 Omen is a dual LPG with a bit more than you might be used to. Like you, I once was lost in the world of low pass gates, seeking something more, something bigger and somehow juicier. The inspiration came to me as I was reading a particularly heavy book on passive filters, and I realized it was possible to make far more interesting LPG designs than the standard we've become so accustomed to.In a convergence of old-school LPG design and more modern components, the Omen boasts two -6dB resonant filters, custom built vactrols, built in CV attenuation and no less than three cutoff modes per filter. Filter 1 is soft and light, imparting a gentle, naturally gated touch of filtering on your sound, while Filter 2 is darker and more resonant, and can turn downright growly and distorted when left wide open.Designed to give you as many creative options as possible, the Omen has the unique ability to function as either two discrete LPG, or as one 4-pole resonant LPG. When plugging a signal in to Input 1, and with no signal plugged into Input 2, the output will be present at both Output 1 and Output 2, with Output 2 producing the signal as it passes through both filters. Tweaking both filters independently will generate a wide array of soft and sometimes harsh tones, ranging from Buchla bongos to early synthesis brass and organ sounds. There is much to love here.CV is similarly handled, by plugging in only one CV source, it will act on both channels - this is useful for creating musically similar outputs as well as when using the dual filter operation. However, the dual filter mode greatly benefits from having two CV inputs: use an envelope in CV1 to act as a VCA, and an LFO in CV2 to create tremolo, for instance.Using custom designed, hand built vactrols, care has been taken to mitigate the less desirable aspects of passive LPGs - in most modules, the user can expect zero bleed through on the LPG channels, and signal attenuation is minimal even with the 4-pole filter settings engaged. Of course, many of the natural features of vactrols remain, such as subtle memory effect when engaging the vactrol for long periods.DIY enthusiast? Rejoice! The Omen is available as a fully loaded DIY kit - everything you need to build your very own Omen packed in one place, so you can easily build one in the comfort of your own home. It is not a difficult DIY project, an ambitious beginner or someone with experience from a few easy builds can tackle the Omen in an afternoon. The build is all through-hole aside from three SMD components, which are easily soldered by hand due to their large size.Finally, you receive maximum blinkenlights as LED's on the front panel simulate the action of the vactrols, so you'll always know what's going on under the hood. No collection of fancy LPG's is complete without the Omen - add some analog warmth to your signals, today.Features:• Functions both as two discrete LPGs or as one multi-pole filter LPG• A passive LPG without the characteristic signal bleed or input loss• You read that right: each LPG contains a resonant two-pole filter• Comprehensive build guide, complete with picturesDIY-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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HEX row is an analogue dual resonant filter with versatile routing capabilities, sidechain/envelope follower and mischievous character, stemming from (mis)use of transistors as variable resistors in the signal route.There are two channels, each controlled by three potentiometers: GAIN (2), RES (3), FREQ (4) and sidechained by CENTER (5). Both channels have the same topology. Inputs •| and |• are fed into each channel’s gain stage and then passed to their filters. The input signal level can be adjusted by setting the GAIN which can either attenuate or amplify a signal x20. Note that the amplification affects the filter’s behaviour—high GAIN disrupts self-oscillation, conjuring PLL-esque harmonics and other sound design artefacts. FREQ and RES are used to manipulate individual filter’s cutoff frequency and resonance. Each channel has a side-mounted switch (6) for selecting low-pass or band-pass filtering. Touch the golden touch pads (1) to manually route the flow of audio and control voltages.SIDECHAIN – Left channel’s (•I, •O) post-gain signal is filtered and fed into an envelope follower. Envelopes polarity and amplitude are adjusted by using CENTER. The adjusted envelope is then mixed in the right(|•, O•) channel’s FREQ parameter. Left half of the CENTER causes the filter to “duck” and the right half produces a gating response. In the middle position, the sidechain effect is inactive.TOPOLOGIESFEEDBACK – Connect the •O and I• sockets with a jack cable and use O• as the main output. Leave •I unconnected as it’s normalised to O• by default.Alternatively, using stereo cables and a headphone splitter adapter enables the use of •O as output with dramatic stereo field dynamics.SERIAL – Connect the audio source to I• and use the •O as output.Input signals are processed through subsequent channels as •I is normalised to O•. This mode enables the so-called twin peak and auto-filtering.PARALLEL – Connect a stereo audio source into •I or two mono sources to •I and I•.Left and right signals are split into separate channels, processed and output as stereo signal via •O or as mono on both outputs.You will need a soldering iron, solder, pliers, tweezers and some patience. Before you begin the process, make sure you are working on a clean, well-lit surface. Be careful with the components, some of them are very small—take them out of the packaging one at a time, when needed. Most of the tiny SMD components are marked with numbers that match the numbers printed on the PCB. If you are new to soldering (SMD), we recommend watching some online tutorials beforehand. For the assembly video, visit our website. In any case, take it slow, go step by step and enjoy the process of building your HEX. It’s like a puzzle that you can use and play with afterwards. Oh, and if you have any questions, do not hesitate to contact us. Have fun!COMPONENTS1. 4,7uF capacitor / 5x2. 10uF capacitor / 2x3. Header pins / 1x4. 3.5mm jack / 4x5. Potentiometers + knobs / 7x6. Nuts + bolts / 5x7. PCB + wooden base / 1xDIY-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.
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Analog optocoupler filther.GOBLET is an analog filter and distortion unit with some added quirks and extra controls. Start with both faders - frequency and resonance - at maximum, turn the trimmers fully clockwise and set the feedback pot at 0. Now insert an input and take the output either from the lowpass out or the notch out. Start to turn the frequency trimmer until the resonance kicks in. Now adjust the resonance trimmer to your taste. The faders now have full range of responsiveness. Adjust the feedback and start the filthering. For extra distortion interact with the two touch plates and the central momentary button.Features:• Unique analog two pole circuit with custom optocouplers fed directly in the feedback path.• Two step controls and individual CV inputs on frequency and resonance for precise sound sculpting.• Dedicated potentiometer for the total amount of feedback.• A performance-oriented momentary switch for extra distortion.• Two expressive touch points to make your body interact with the circuit.• Rhythmically oriented accent CV input.• Two outputs - a smoother LP and an aggressive notch.• Works with audio and CV sources.• 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.