5U MFOS Synth Modules

This PCB is included as part of the PCB sets for the 16-step and 16-step quantized sequencers. For completeness we have made this PCB available on its own just in case you have a need for it. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS 10-step sequencer The MFOS Ten Step Analog Sequencer is a great first sequencer project. The main idea of a sequencer is to provide an automatic means of sequentially stepping through a series of adjustable voltages to drive a VCO (or any other voltage controlled device). Additionally, gate and trigger signals are generated as the sequencer steps to each new voltage. A sequencer can control the frequency of an oscillator (or several oscillators) to produce repeating tonal patterns, or arpeggios. This sequencer design is simpler than the MFOS 16 step sequencer and has fewer steps and features. Nevertheless, it is still a fun synth-diy project. A sequencer is a mainstay of any modular analog synthesizer. Two to Ten Step Sequences Reset At Count and Stop At Count options External Start (great for arpeggios) Start/Stop, Step and Reset functions. Gate selectable on/off for each step Great for a first sequencer project. Three CV Outputs. Portamento on CV3 output. High/Low Output Range. NOT EXTERNALLY CLOCKABLE (Kind of an anti-feature) Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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Want to upgrade your 16-channel MFOS analogue sequencer to the quantized version? Then this Vari-clock PCB is just what you need. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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"Daisy Chaining" more Analog PCBs Looking to expand your 16-channel analogue sequencer then you can drive more than one analog sequencer board from one digital board. This is accomplished by chaining the QA, QB, QC, and QD connections from the digital sequencer board to one or more additional analog sequencer boards. The illustration below shows this. Each additional analog PCB requires it's own set of coarse and fine pots and a new set of CV output jacks and portamento control. These are mounted on a panel and wired just like the original set of coarse/fine pots, CV out jacks and portamento pot. The result is that you can now control separate modules with a synchronized 16 step sequence. You still only get 16 steps. Adding analog PCBs does not result in more steps. Adding more analog boards lets you do things like: have a 16 step sequence of chords (controlling separate VCOs) or control a VCF with one set of controls and some oscillators with the other set. You can imagine a ton of cool applications. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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This bare PCB is designed to work with the MFOS 16 Step Sequencer and supports both another set of "active step" LED indicators and another set of gate switches if that's something you want or need to build. So when you decide to expand your sequencer with another MFOS 16 Step Sequencer Analog board you'll want to add "active step" LED indicators and this board is perfect for that. Or maybe you want to build the Vari-Clock module into a separate cabinet because your sequencer cabinet is full... again you'll want to add "active step" LED indicators and this board is perfect for that. Or let's say you want another set of gate switches and another gate and trigger output and "active step" LED indicators... guess which board is perfect for that... BINGO! This is the very board. The board can be used in these two modes: 1) as another set of both LEDs and gate/trigger switches and 2) as just another set of LEDs. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A set of three bare PCBs (digital, analogue and vari-clock) for the MFOS 16-Step Quantized Vari-Clock Analogue Sequencer. This improves on the 'standard' 16-Step Sequencer by including variable step duration. In addition to the 'standard' sequencer, this version features: Each step's duration can be set independently. Each step's duration is settable from 1 to 16 clock cycles. Main clock adjustment affects all steps equally. Clock selection: Quantized or Normal Two gate/trigger modes: Single per step and Multi per step. External clock supported. Clock out supported. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A set of two bare PCBs (one for the analogue circuitry and one for the digital) for the MFOS 16-Step Analogue Sequencer that features: Sequences of 4 to 16 steps in length Modes include stop at count, reverse at count,reset at count and random 16 mode Each step has coarse tune, fine tune, and switchable gate Accepts external clock and external start pulse. Simultaneous outputs with and without portamento. Forward, Back, and Reset controls ease sequence set up. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS 1V per Octave Calibrator. Variable Cycle Rate 0V thru 3V and 0V thru 7V settings Very accurate when resistors are hand selected to 0.1% Facilitates calibration of Volt Per Octave modules. Ideal for calibrating VCOs, VCFs etc. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A pack of 3 bare 'MFOS Swiss Op Amp Knife' PCB The Swiss Op Amp Knife is for when you have an idea that requires some op amps and associated components and you want a quick PC board to accommodate the circuitry and you can't stand the thought of putting one of those phenolic strip boards into your hand-crafted synth. This is a great PCB for putting together quick glue circuits quicker or more conveniently. This product is definitely for you more seasoned hobbyists who already have ideas for op amp circuits and just need a quality place to put them without having to etch a board or use strip board. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Wall Wart Bipolar Power Supply. Excellent Sound Lab power supply. Can use LM78XX/LM79XX or LM78LXX/LM79LXX regulators Supports plenty of capacitance for a clean supply. Convenient source of bipolar (+/-V) power from a wall wart (plug top power supply). Low parts count. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Adjustable Bipolar Power Supply. This is a great bipolar power supply for your modular synthesizer project. This LM317/LM337 based supply boasts 1.5A capability and adjustable output so you can supply your projects with anything between +/-9 and +/-15 volts. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A pair of bare PCBs for the MFOS Sound Lab Mini Synth Plus project. This project is a reprise of the Sound Lab Mini-Synth with the addition of a Sample and Hold and several circuit and component value changes to improve performance. Even if you have already built a Sound Lab I would recommend this as a completely new project. Of course if you desire to you can mod your existing Sound Lab to match this project. This project is fun for someone with intermediate to advanced electronics skills who wants to make cool sounds. It makes a great first synth project but is interesting enough for the seasoned synth-diyer too. The board includes 1V/oct scale adjustment trimmers for the oscillators You will get a couple (maybe three) octaves of in tune scale. If you have a sampler you can use this unit as an analog synth sound source to make excellent samples with. Some of the wiring is done on the chassis but the drawing included will make it very easy for you to do a neat job while you build it. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Sound Lab Mini-Synth MKII project. Features Two Musically Accurate VCOs With 1V/Octave Tracking White Noise Generator Audio Mixer With External Input State Variable VCF Low-Pass & Band Pass Response VCF Doubles As 1V/Oct Tracking Sine Wave Oscillator VCF Has Multiple Modulation Options VCA Has Multiple Modulation Options LFO (Ramp, Saw, Tri and Square) Two AD/AR Generators Keyboard Control Inputs VCOs and VCF Normalized To Keyboard CV Input AD/AR Generators Normalized To Keyboard Gate Input Patchable Sample And Hold Two Repeat Gate Generators for AD/AR Generators AD/AR Generators Normalized For S&H Triggering  Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Synth-DIY Experimenter project. Features A great introduction to synth-diy! A circuit benders playground! Perfect for adding a Sound element to your art installation! Great undergrad electrical engineering project! Great adult and child project activity. Two sound effect oscillators (not 1V/oct) Two Voltage Controlled Filters (not 1V/oct) Two Voltage Controlled Amplifiers (Linear Response) Two Triangle/Square Wave LFOs Two Simple AR Generators White Noise Generator Use any or all of the circuits on the board! Flexible power supply options (Two 9V batteries or a bipolar supply) Flexible two op amp kludge area for adding glue circuitry.  Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Sound Lab Mini Synth project. This project is fun for someone with intermediate to advanced electronics skills who wants to make cool sounds. It makes a great first synth project but is interesting enough for the seasoned synth-diyer too. The board includes 1V/oct scale adjustment trimmers for the oscillators You will get a couple (maybe three) octaves of in tune scale. If you have a sampler you can use this unit as an analog synth sound source to make excellent samples with. Some of the wiring is done on the chassis but the drawing included will make it very easy for you to do a neat job while you build it. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Sound Lab Expander project. The MFOS Sound Lab ULTIMATE EXPANDER in combination with an MFOS Sound Lab ULTIMATE is a completely full featured modular synthesizer. Although specifically designed to be a companion to the Sound Lab ULTIMATE the ULTIMATE EXPANDER has the features to stand  as a super "on its own Swiss Army Knife" module. The MFOS Sound Lab ULTIMATE EXPANDER includes:  A State Variable Voltage Controlled Filter (doubles as a 1V/oct sine wave oscillator over several octaves) A Voltage Controlled Amplifier (expo response) An ADSR Envelope Generator A Four Channel Active Mixer A One-In Three-Out Voltage Distributor A CV Inverter An Analog Multiplier (Ring Modulator) An External Signal Buffer An Envelope Follower Two Passive Voltage Attenuators A Headphone Amplifier Signal Routing and Buffering for The Sound Lab ULTIMATE Patch Panel Design Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Sound Lab Ultimate project. The MFOS Sound Lab ULTIMATE is simply put, one of the coolest things you will ever build with your own two hands. If you've always wanted to build your own analog electronic music synthesizer, the MFOS Sound Lab ULTIMATE may well be exactly what you've been waiting for. The MFOS Sound Lab ULTIMATE is the completely new single board mono-synth from MFOS with the sickest set of features you'll find on one PC board:   Three Musically Accurate VCOs (sawtooth and variable width rectangular wave forms, pulse width modulation, hard-sync, log and linear CV inputs) VCOs provide plenty of tracking range. Listen to the samples below. White Noise Generator Active Mixer (for VCOs, noise and external input) Voltage Controlled LP Filter (12db/Oct doubles as a sine wave oscillator) Voltage Controlled Amplifier (log response) Attack Release Envelope Generator Two Low Frequency Oscillators (square, ramp, tri and sawtooth waveforms) Repeat Gate Generator (doubles as another square wave LFO) Sample & Hold (with variable sample rate and glide) Attenuator Bank (for an infinite variety of modulation patches) Patch Panel Design (provides infinitely variable combinations of sounds) Sound Lab ULTIMATE "Expander" also available for added flexibility.   Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Alien Screamer project. Easy to build Uses one 9V battery (portable) Built in amplifier and speaker. Kludge area on PC board (customizations...) Low current design extends battery life Makes a plethora of cool and interesting sounds Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Weird Sound Generator. This is a really fun project and it makes a LOT of weird sounds. You will have hours, no at least days... weeks of fun making weird sound after weird sound. You will make at the very least a MILLION weird sounds in the first month alone. Recommended that you use this in conjunction with your hardware or software sampler to provide tons of timbres for you sampling synth. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for perhaps the most popular off all Ray Wilson's designs - the MFOS Noise Toaster. Easy to build Wide Range VCO White Noise Generator Cool low Pass Filter Simple But Effective VCA AR Generator with Repeat or Manual Pushbutton LFO with Square, Integrated Square and Differentiated Square waves Nicely Normalized Switching Scheme PCB Has Pads for Interface to Other DIY Projects Built in One Watt Audio Amplifier and Speaker. Uses one 9V Battery (portable) Low Current Design Extends Battery Life Makes a plethora of plethoras of cool and interesting sounds WILL attract alien visitations - CAUTION ADVISED WILL DEFINITELY cut into TV viewing time - CAUTION ADVISED Stimulates plant growth and calms goldfish. Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Echo Rockit Noise box. Simple 9V Battery Supply External Input with Mic/Line Capability Put external signals through VCF and Echo Resonant Low Pass VCF Doubles as Sine Oscillator External Voltage Control of VCF Cut Off Frequency Echo Effect Processing (Volume, Delay, Repeat) LFO Has Triangle and Square Waves LFO Has Low and High Range LFO Modulates Cut Off Frequency LFO Modulates Echo Delay Time Internal Oscillator for VCF Excitation Exudes Coolness and... Amazingness! Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Voltage Controlled analogue reverb unit Voltage controlled reverb level Voltage controlled original level Supplied without components or instructions, Soundtronics stock all components needed to build these modules. Erratum The official MFOS PCB differs slightly from the instructions / PCB layout on the MFOS website. The VC Reverb was the last product from Ray Wilson before his passing and a few anomalies remain with the PCB. We have identified what we believe are the only differences which are a few components to form a high pass filter R9, R39, R40 & C27. Also C1 and C5 see further down the page.   R40 (100k) is solder on the rear of U1 between pins 3 & 4.   R9 (10k) is soldered to C27 (22nF) before soldering into the R9 position. It is important the resistor and capacitor are soldered exactly as per the photo below. R39 (1k) is soldered from the casing of the phono socket to the junction of R9 and C27.   Finally, D4 is shown as Z2 on the PCB silk screen and with an incorrect orientation. Photo below shows D4 in its correct position.     Gary J from Florida also pointed two other differences that we did not mention in the erratum above which relate to C1 and C5. C1 is a 1uF tantalum capacitor in the schematic and parts list but the PCB silk screen only shows a non-polarised capacitor. C5 on the PCB shows it being polarised but is actually a 100nF non-polarised ceramic capacitor.   When soldering in C1, make sure the +v side of the capacitor is facing towards U1.   The spacing for C5 is too narrow so simply form the leads to suit, it does not matter which way around it is soldered in.   Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A pair of bare PCBs for the MFOS Wave Former Two to ten step sculptable waveform. Square or sawtooth wave shapes Great source of new timbres Wave rounding (slew) control Great source of modulation Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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A bare PCB for the MFOS Voltage Controlled Echo Module. Mic/Line Input (x100 Gain in Mic Mode) Original Signal Volume Control Voltage Controlled Echo Volume Voltage Controlled Feedback (Repeat) Voltage Controlled Echo Delay Buffer Output Useful for General Synth Work Total blast to play with! Supplied without components or instructions. For build instructions see the MFOS website. Soundtronics (Sonic Synths) MFOS Projects are authorized by Music From Outer Space

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