Projects

Stomper

Stomper
STOMPER is a drum generator for Eurorack that uses an unfiltered square-wave oscillator. Quickly sweeping the oscillator results in a satisfying high-q-sounding zip and thud due to all the crazy harmonics. All inputs can be CV controlled (0-5V), including the built-in clock-divider. It uses standard 10 pin +12/-12 power, drawing a paltry 30mA. It’s triggered...

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CV Clock Divider

CV Clock Divider
This clock divider uses a control to select a single clock division ratio. The clock can be controlled manually, or with CV control. Responds to START/STOP and RESET for full automated control. Features and Specs: -12 divisions from /1 to /96 assuming 24ppqn, but can divide any clock source. -Clock division CV (0-5V) controlled. -Manual...

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Clock Divider Tile

Clock Divider Tile
This clock divider uses a control to select a single clock division ratio and fits in a single tile. Features and Specs: -12 divisions from /1 to /96 assuming 24ppqn, but can divide any clock source. -Depth: 40mm -Power: 10-pin Eurorack DIP -Current: 12V:15ma -Panel: PCB with silkscreen. -AtTiny85 based, Arduino-compatible source code included (here)....

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EuroArdCore

EuroArdCore
    Snippet ** References ** D0/RX - Expansion pin 10 (MIDI IN) D1/TX - Expansion pin 12 (MIDI OUT/THRU) D2 - Clock (digital input or output) D3 - Trigger/Gate 1 (digital input or output) D4 - Trigger/Gate 2 (digital input or output) D5 - Expansion D6 - Expansion D7 - Expansion D8 - Expansion D9 - Expansion D10 - USED (DAC SS) D11 - USED (DAC MISO) D12 - RESERVED (MOSI) D13 - USED (DAC SCK) A0 - Control 1 A1 - Control 2 A2...

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Building the Euclidean

NOTES FOR NEW PCB: The new PCB has the name "Euclid2-31" on the back top right corner of the PCB. The only differences are: BAT54S instead of transistors on the outputs. Circuitry for 3 analog/digital inputs or digital outputs, including jacks. These are wired to A5, A6, and A7 through previous expansion port (which is...

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Dual CV Scale/Offset

Schematic: BOM: QtyValueDevicePackagePartsDescription 1Header2X5 SHROUDEDJP110-pin Eurorack Shrouded Power Header6100kResistorR0805R1, R2, R3, R6, R7, R8RESISTOR4100nCapacitorC0805C2, C3, C4, C5CAPACITOR210uCapacitorE2,5-5C6, C7POLARIZED CAPACITOR21kResistorR0805R5, R10RESISTOR21n4007DiodeD-7.5D1, D2DIODE2200kResistorR0805R4, R9RESISTOR247pCapacitorC0805C1, C8CAPACITOR4B100kPotentiometer9MM SNAP-IN POTOFFSET, OFFSET1, SCALE, SCALE19mm vertical snap-in pot, Alpha / Panasonic style with 6mm built-in knob.43.5mm JackTHONKICONNIN, IN1, OUT, OUT13.5mm socket for Eurorack modular synthshttp://shop.erthenvar.com/collections/accessories/products/3-5mm-inline-jackshttps://www.thonk.co.uk/shop/3-5mm-jacks/1TL074DTL074DSO14IC1OP AMP Instructions: Clean PCB with isopropyl alcohol....

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SDIY PCB Adapter

SDIY PCB Adapter
I've been building Eurorack modules from PCB layouts found online, but was never happy with the spaghetti wiring and panel mounting difficulties. Not to mention the problem of troubleshooting when all the pots, jacks, toggles, and switches are flopping about willy nilly. The boards are mounted to the front panel with the pots, so the...

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CV Touch Keyboard Tile

CV Touch Keyboard Tile
Now Available http://youtu.be/ri6kTrqAk1E The CV Touch Keyboard fits a 5 Octave latching keyboard into 3 tiles. 10-pin Eurorack Power 12-bit DAC Latch 5 Octave keyboard Tuning: The module uses multipoint tuning which tunes to each octave and then interpolates the tuning for all notes between those octaves. But because the lowest and highest limits are...

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Clock 1u Tiles

Clock 1u Tiles
http://youtu.be/aA08iEY5SVk   Clock Multiplier Clock Generator Clock Divider MIDI Clock Racked Three Four clock utility modules for Eurorack 1u tiles. Clock Generator: Generates 24 PPQN or 4 PPQN clocks. Clock rate can be CV controlled. Has Start/Stop and tap-tempo. Clock Divider: Divides clock down by odd or even multiples (selectable). Middle jack can be configured...

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Building the MINIaudioMIXER Tile

Building the MINIaudioMIXER Tile
Notes: If A10K ("audio" or log) pots aren't handy, there's a 2K logarizing™ resistor between the wiper and ground which will let you use a B10K linear pot instead. If you're using A10K pots then jumper the 2K pads with a blob of solder or 0K resistor. The 1N4007s in the schematic and silkscreen are...

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Building the 12V Power Supply

Building the 12V Power Supply
Schematic and BOM here: https://github.com/THX2112/12VAC-Eurorack-Power-Supply

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Building the 3×4 DIY 1U Tile Case

Building the 3×4 DIY 1U Tile Case
Notes: READ INSTRUCTIONS BEFORE STARTING. Use a PVA type glue, like wood glue, Weldbond, Elmer's, etc. Apply sparingly and clamp 10 minutes to set. Allow 24 hours to cure completely before sanding, painting, installing modules. Work on a clean, flat surface. The work surface can be used to align parts. Power supply requires a 12V...

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Building the Tube Overdrive

Building the Tube Overdrive
Notes: Almost all component values have changed since the PCB was manufactured. See diagram below for changes. Circuit based on the Mitsumin Valvecaster, specifically the "6111 Sub Caster". This PCB also has components added for many of the popular modifications. Tons of info here. Power regulator needs a heat-sink. A simple clip-on worked fine, but...

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Building the VCF Tile

Building the VCF Tile
Notes: IF THE PCB VERSION IS NUMBERED "108" OR HIGHER SEE THIS PAGE FOR INSTRUCTIONS. The following picture shows where values are changed from what's printed on the PCB (in yellow). The 330 and 240 ohm resistors labelled below control the resonance gain, and are very tweakable. Some other values are on the schematic. These...

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Building the VCA Tile

Building the VCA Tile
Notes: Latest version of the PCB has all surface-mount components on one PCB, and a separate smaller PCB for the power components. Values have been corrected on the PCB. Build guide is here: https://syinsi.com/projects/building-new-vca-tile/ The following picture shows where values are changed from what's printed on the PCB (in yellow). The circuit is a mostly...

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Building the LFO

Building the LFO
PCB and Schematic: Latest Revision D PCBs (labelled on front of PCB) use a A100K pot instead of a A1M pot. Some parts values are different: 1u capacitor instead of 100n; 47k resistor instead of 680k; 0R resistor instead of 1K. The PCB is labelled with the correct values. BOM: QtyValueDevicePackageDescriptionSource 1Source 2 33.5mm Audio...

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Building the A/R EG

Building the A/R EG
PCB  and Schematic:   Later revisions have an integral Gate to Trigger converter (middle jack) that shortens a gate to about 10ms trigger and then uses that to generate the envelope. This is useful if the Gate signal is an entire note-length long to give the RELEASE control time to do something before the next...

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Building the CV Mixer

Building the CV Mixer
The CV Mixer crossfades between two CV, gate/trigger/clock, or audio signals. There is also an inverted output of the mixed signal. The circuit is built around four Opamp buffers, with one used to drive a bipolar LED to indicate signal polarity and level. BOM: QtyValueDevicePackageDescriptionSource 1Source 2 4 3.5mm Audio SocketTHONKICONN3.5mm socket for Eurorack modular...

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Building the Pedal IO

Building the Pedal IO
PCB and Schematic:   BOM: QtyValueDevicePackageDescriptionSource 1Source 2 2100nCapacitor0603Note Package! Unlabelled on PCB110kResistor0805110pCapacitor0805110uCapacitor08051150kResistor080511MResistor080511kResistor080521kTrim Pot6mm top adjustment.http://www.taydaelectronics.com/potentiometer-variable-resistors/trimmers/6mm-top-adjustment.html21uCapacitorC8051200rResistor0805122kResistor0805147pCapacitor08051500rResistor08051B10kPotentiometer9MM SNAP-IN9mm vertical snap-in pot, Alpha / Panasonic style with 6mm built-in knob.2M7DiodeDO214AA1n4007 or equivalenthttps://octopart.com/search?q=rectifier&start=0&category_ids=4226&specs2.2.values=SMA&specs2.330.numbers=(50__200)&specs2.313.numbers=1&sort=median_price_1000&sort-dir=asc4THONKICONN3.5mm Audio JackTHONKICONN3.5mm socket for Eurorack modular synthshttp://shop.erthenvar.com/collections/accessories/products/3-5mm-inline-jackshttps://www.thonk.co.uk/shop/3-5mm-jacks/1Tile Tail"Futaba J" Tile Tail.http://pulplogic.com/product/tile-tail/2 TL072SO08Almost any dual opamp can be used. PCB Corrections: PCB version "VCOTiles28"only: Cut the...

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Building the CV Scale Offset

Building the CV Scale Offset
BOM: QtyValueDevicePackageDescriptionSource 1Source 2 4100nCapacitor0603! 0603 Package !610kResistor0805 11MResistor0805 21kResistor0805 21uCapacitor0805 120kResistor0805 12kResistor0805 2B10kPotentiometer9MM SNAP-IN9mm vertical snap-in pot, Alpha / Panasonic style with 6mm built-in knob.http://www.taydaelectronics.com/potentiometer-variable-resistors/rotary-potentiometer/linear/10k-ohm-linear-taper-potentiometer-round-knurled-plastic-shaft-pcb-9mm.htmlhttps://shop.erthenvar.com/collections/9mm-potentiometers/products/9mm-vertical-panel-trimmer1 LED5MMBicolour two-pin LED (red green)https://www.digikey.ca/product-detail/en/everlight-electronics-co-ltd/MV5491A/1080-1116-ND/26756072 M7 (1n4007)DiodeDO214Polarity protection diode.https://octopart.com/search?q=rectifier&start=0&category_ids=4226&specs2.2.values=SMA&specs2.330.numbers=(50__200)&specs2.313.numbers=1&sort=median_price_1000&sort-dir=asc3 3.5mm audio socketTHONKICONN3.5mm socket for Eurorack modular synths "Thonkiconn" style.http://shop.erthenvar.com/collections/accessories/products/3-5mm-inline-jackshttps://www.thonk.co.uk/shop/3-5mm-jacks/1 Tile power tail"Futaba J" type power lead.http://pulplogic.com/product/tile-tail/EBay2TL072OpampSO08Almost any dual Opamp...

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Building the Signal Clone

Building the Signal Clone
The Signal Clone is a 5x1 buffered mult for CV, gate/trigger/clock, or audio signals. One of the outputs is inverted. The circuit is built around six Opamp buffers, with one used to drive a bipolar LED to indicate signal polarity and level. BOM: QtyValueDevicePackageDescriptionSource 1Source 2 6100nCapacitor 0603! 0603 Package !210uCapacitor 080521uCapacitor08052M7 (1N4007)DiodeDO214Polarity protection diode.https://octopart.com/search?q=rectifier&start=0&category_ids=4226&specs2.2.values=SMA&specs2.330.numbers=(50__200)&specs2.313.numbers=1&sort=median_price_1000&sort-dir=asc1BicolourLED5MMBicolour...

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Building the NEW VCA Tile

Building the NEW VCA Tile
Notes: Latest version of the PCB has (redundant) trimming components removed, and no offboard power PCB. The circuit is a mostly faithful copy of the Sims 13700 VCA as described in his paper. Component values changed for a 0-5V CV range. There are four PCBs: Front panel. Interface (holds pots and jacks). Main Offboard Power....

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Building the VCO Classic

Building the VCO Classic
PCB and Schematic: Area in yellow box contains the optional 4.7k NTC thermistor and matched transistor package (unlabelled on PCB). 2.2k resistor in red should be changed to 1.5k if not using the NTC thermistor. If using the NTC thermistor, it can be thermally bonded to the matched transistors by covering both with thermal compound....

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Building the New VCF Tile

Building the New VCF Tile
PCB and Schematic: Previous Revision: BOM: QtyValueDevicePackageDescriptionSource 1Source 2 33.5mm Audio SocketTHONKICONN3.5mm socket for Eurorack modular synthshttp://shop.erthenvar.com/collections/accessories/products/3-5mm-inline-jackshttps://www.thonk.co.uk/shop/3-5mm-jacks/7100nCapacitor06031100pCapacitor0805110uCapacitor080551uCapacitor08052560pCapacitor08051 Female Header1X031 Female Header1X041Jumper1X021LM13700LM13700MSO16Dual OTA with buffers.2DiodeM7SMAPower diode (1n4007)https://octopart.com/search?q=rectifier&start=0&category_ids=4226&specs2.2.values=SMA&specs2.330.numbers=(50__200)&specs2.313.numbers=1&sort=median_price_1000&sort-dir=asc2 Male Header1X031 Male Header1X0413906MMBT3906SOT23-3PNP Transistror2B100kPotentiometer9MM SNAP-IN9mm vertical snap-in pot, Alpha / Panasonic style with 6mm built-in knob. Audio taper.http://www.taydaelectronics.com/potentiometer-variable-resistors/rotary-potentiometer/logarithmic/1m-ohm-logarithmic-taper-potentiometer-round-knurled-plastic-shaft-pcb-9mm.html2100kResistor0805210kResistor08051150kResistor080531kResistor0805622kResistor08051100RResistor0805On back of second PCB12k2Resistor0805247kResistor08051OpampTL072SO08Almost any dual Opamp can be used15.1VZENER...

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Building the Glide

Coming soon...

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Building the Sample and Hold + Noise

Coming soon....

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Euro-G1

Euro-G1
The Euro-G1 is an all-in-one Eurorack synthesizer built around the DSP-G1 synthesizer chip by DSP Synthesizer. The DSP-G1 is a complete analog modelling synthesizer with 15 DCOs structured as 5 note paraphonic with a 24db lowpass filter with resonance, amplifier and filter envelopes, and an LFO. The Euro-G1 breaks out all parameters for the DSP-G1...

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