Land Boards Synth Components
Contents
Synth Modules (Standalone)
Eurorack Modules
MOD Designs
Box Build
Reference Docs
- Doepfer Eurocard inventor/specs
- MIDI Communication
- Creative Control Strategies: MIDI to CV
- EuroPi
- Eurorack Beginners Guide
- Eurorack Wiki page
- KiCad Audio Jack Symbols
- MidiSoft
- A simplified guide to TRS MIDI
- How to Make Your Own 3.5mm mini stereo TRS-to-MIDI 5 pin DIN cables
- Eurorack Power Connectors
- MIDI Electrical spec
Projects
- elkayem midi2cv GitHub page - Nano based project
- Arduino MIDI library has not yet been ported to Pico so will need to use Python
- Drives 4 CV outputs: Pitch Blend, Control, Note, Velocity
- This card only drives Note (Voltes/Oct, Mod)
- PicoPicoSynth
- Deftaudio GitHub - KiCad footprints
- Turing Machine
- DIY Hackable Arduino Drum Machine
- Build the Auduino Granular Synth
- Benjie's Synth DIY notes - Nice docs
- REDDIT Synth DIY
- tkilla64 Nice collection of Eurorack module designs - mostly Gerbers
- Scott Billingsley Philosophy of Noise - GitHub Repo
- Andrew Kilpatrick DINTREE GitHub
KiCad Libraries
- Ben Jiao Modular KiCad Libraries
- graybloomfield - Very nice Arduino based designs
Other Notes
Daughterboard Heights
- From notes on How to Make Great Looking Modular Front Panels - Part 3 Module Circuit Board Layout
- The absolute maximum of other boards I've seen is 111,5 mm and the TipTop Happy Ending Kit offers a space of 112,5 mm
- 114.8mm measured between 3U Synthrotek rails
- 128.5mm - 114.8mm = 13.7mm both sides, 6.875mm per side
- 111.5mm daughtercard, leaves 8.5mm clearances top/bottom
Part Orientations
- For pots with built-in pointers, pot pins go down for pointer to go up at center point
Front Panel Jacks
Eurorack Vertical Pots
Op Amps
- From this site
- The TL084 Op-Amp is very similar to TL074 but has high noise immunity and better offset characteristics.
- The TL074 has lower noise figure, so is better for AC signals.
- The TL084 has lower offset, so is better for DC signals.
- The TL084 has better DC performance (low offset) and the TL074 has better noise/distortion performance.
- You can use TL074s on the audio paths, TL084s on the control paths.
- TL074 Datasheet
- TL084 Datasheet
- The TL074 is $0.75 in qty 10 (on Mouser)
- The TL084 is $0.55 in qty 10 (on Mouser)
- The TL072 and TL082 are both about the same price as each other, but are more expensive than the quad parts
Module Kits
- Erica Synths
- SyntherJack - DIY Synths
- BEFACO - Kits
- Kassutronics DIY Store
- Kassutronics DIY GitHub
- Music From Outer Space
- Thonk Shop - in UK
- synthrotek
- TuringMachine Mark 2
Software
- adafruit_midi CircuitPython API
- MIDI Controller in Python
- USB to Serial MIDI
- MidiEditor
- Convert binary files to C data arrays (Arduino) - In Japanese
- Binary to C Array
- Arduino Mozzi Library
- esp32_basic_synth
- esp32_usb_midi
- arduino_midi_library
- Pico MIDI Host to MIDI UART Adapter
Hardware/Parts
- Synthrotek Store
- THONKICONN – 3.5MM JACK SOCKETS
- Potentiometers are usually marked with an "A" for logarithmic taper or a "B" for linear taper;
- RV09AF vertical mount is Alpha pot part number
- 9mm Pots
- Tayda 3.5mm Jacks and stuff
Samples
HAGIWO Builds
| FUNCTION | 3.5MM | POTS | TOGG | PBS | ROT | DIN5 | CPU | LINK |
|---|---|---|---|---|---|---|---|---|
| MIDI-IN-OUT | 0 | 0 | 0 | 0 | 0 | 2 | NONE | |
| SCF-2 | 2 | 0 | 0 | 0 | 0 | 0 | NONE | |
| SYNTH-MIDI-CTL-01 | 4 | 0 | 0 | 0 | 0 | 2 | XAIO RP2040 | |
| SYNTH-MIDI-CV4-01 | 4 | 0 | 0 | 0 | 0 | 2 | XAIO RP2040 | |
| SYNTH-MIXER6-01 | 7 | 7 | 0 | 0 | 0 | 0 | NONE | https://note.com/solder_state/n/nffc1a33053be |
| SYNTH-VCO-01 | 4 | 2 | 2 | 1 | 0 | 0 | XAIO RP2040 | https://note.com/solder_state/n/nca6a1dec3921 |
| SYNTH-VCO-03 | 4 | 2 | 2 | 1 | 0 | 0 | XAIO RP2040 | https://note.com/solder_state/n/nca6a1dec3921 |
| No.56 Sample Drum | 3 | 1 | 1 | 0 | 0 | 0 | ESP32C3 | https://note.com/solder_state/n/n950ed088c3cb |
| No.55 V2164 Dual VCA | 6 | 6 | 0 | 0 | 0 | 0 | NONE | https://note.com/solder_state/n/nd82c027d0597 |
| No.54 PT2399 clock sync delay | 4 | 3 | 1 | 0 | 0 | 0 | NANO | https://note.com/solder_state/n/nf6dc0a61e26d |
| No.52 Reverse step sequencer | 4 | 8 | 2 | 0 | 0 | 0 | CDT7350 | https://note.com/solder_state/n/n13c49f08ca1f |
| No.50 LFO/VCO rebuild | 2 | 3 | 1 | 0 | 0 | 0 | NANO/AD9833 | https://note.com/solder_state/n/nd2c22a73e8fe |
| No.49 Clock Divider | 11 | 0 | 0 | 0 | 0 | 0 | TC4040BP | https://note.com/solder_state/n/n7979cda44dcb |
| No. 47 Sample & hold | 3 | 2 | 1 | 0 | 0 | 0 | LF398 | https://note.com/solder_state/n/n29b52f4f01f1 |
| No.46 Dual Envelope generator | 4 | 8 | 0 | 0 | 0 | 0 | NANO | https://note.com/solder_state/n/n6fb73eb1d8b8 |
| No.45 Diode clip Distortion | 2 | 3 | 0 | 0 | 0 | 0 | NONE | https://note.com/solder_state/n/n5f35e2e84a3e |
| No.44 Wave shaper & VCA | 2 | 1 | 0 | 0 | 0 | 0 | NONE | https://note.com/solder_state/n/nfdc2e198255a |
| No.43 Envelope Follower | 4 | 3 | 0 | 0 | 0 | 0 | NONE | https://note.com/solder_state/n/n110e9ba066b3 |
| No.42 PCM drum | 6 | 4 | 2 | 1 | 0 | 0 | NSX-1/SAMD | https://note.com/solder_state/n/neabe7e014c11 |
| No.40 Voltage controlled switch | 8 | 1 | 0 | 1 | 0 | 0 | NJU211 | https://note.com/solder_state/n/n98883e71f814 |
| No.39 Diode ladder VCF | 3 | 3 | 0 | 0 | 0 | 0 | NONE | https://note.com/solder_state/n/n598f23105ec4 |
| No.38 Touch controller | 5 | 1 | 1 | 4* | 0 | 0 | NANO/MPR121 | https://note.com/solder_state/n/ncd42925f726b |
| No.37 Overflow folding VCO | 4 | 3 | 0 | 1 | 0 | 0 | XIAO | https://note.com/solder_state/n/nf01e7c92b010 |
| No.36 LM13700 Dual VCA | 6 | 2 | 0 | 0 | 0 | 0 | LM13700 | https://note.com/solder_state/n/n3357199504d8 |
| No.35 CV to MIDI | 6 | 1 | 0 | 0 | 0 | 1 | NANO/SSD1306 | https://note.com/solder_state/n/nb618127f37c9 |
| No.33 Dual Quantizer | 7 | 1 | 0 | 0 | 1 | 0 | SAMD/SSD1306 | https://note.com/solder_state/n/nb8b9a2f212a2 |
| No.32 Spin FV-1 multi FX | 5 | 5 | 0 | 0 | 0 | 0 | NANO/FV-1 | https://note.com/solder_state/n/n1c402a78a0fe |
| No.31 Ring modulator & wavefold | 4 | 3 | 0 | 0 | 0 | 0 | AD633 | https://note.com/solder_state/n/n9d138d74b39d |
| No.30 Euclidean rhythm sequencer | 7 | 0 | 0 | 1 | 1 | 0 | NANO/SSD1306 | https://note.com/solder_state/n/n433b32ea6dbc |
| No.29 SH-101 type sequencer | 7 | 1 TRIM | 0 | 1 | 1 | 0 | SAMD/SSD1306 | https://note.com/solder_state/n/n80f4baf81226 |
| No.28 DSP multi effector | 2 | 0 | 0 | 0 | 0 | 0 | DSP | https://note.com/solder_state/n/nd9c984a9ab7a |
| No.27 5ch mixer | 6 | 6 | 0 | 0 | 0 | 0 | NONE | https://note.com/solder_state/n/nffc1a33053be |
| No.26 V2044 VCF | 3 | 3 | 0 | 0 | 0 | 0 | V2044 VCF | https://note.com/solder_state/n/n0fabdc23fe1e |
| No.25 Oscillo scope & Spectrum analyzer | 3 | 1 | 1 | 0 | 1 | 0 | NANO/SSD1306 | https://note.com/solder_state/n/n6b4cc8d1c6b9 |
| No.24 V2164 Dual VCA | 6 | 2 | 0 | 0 | 0 | 0 | V2164 | https://note.com/solder_state/n/n14a8be5f7118 |
| No.23 CHORD VCO | 4 | 3 | 0 | 0 | 0 | 0 | NANO | https://note.com/solder_state/n/n681d2e07e324 |
| No.22 Additive VCO | 4 | 3 | 0 | 0 | 0 | 0 | NANO | https://note.com/solder_state/n/n30b3a8737b1e |
| No.20 CV/GATE 8step sequencer | 3 | 8 | 1 | 0 | 0 | 0 | CD4022BE /NE555 | https://note.com/solder_state/n/n4da93d157f26 |
| No.19 FM VCO | 4 | 3 | 0 | 0 | 0 | 0 | NANO | https://note.com/solder_state/n/n88317851a4c7 |
| No.18 2OSC VCO | 3 | 3 | 1 | 0 | 0 | 0 | NANO | https://note.com/solder_state/n/n71c67b5aaeca |
| No.17 Multi mode Envelope generator | 2 | 4 | 1 | 0 | 0 | 0 | NANO | https://note.com/solder_state/n/n69643b792274 |
| No.16 CV/Gate sequencer & Arpeggiator | 5 | 0 | 0 | 1 | 1 | 0 | NANO/SSD1306 | https://note.com/solder_state/n/n7c2809976698 |
| No.15 TR-808/909 sample player drum | 5 | 0 | 0 | 1 | 0 | 0 | SAMD/SSD1306 | https://note.com/solder_state/n/n0209d16d0d08 |
| No.14 KICK | 3 | 4 | 0 | 0 | 0 | 0 | NANO | https://note.com/solder_state/n/ne33e32660d50 |
| No.13 Noise & Hi-hat | 4 | 3 | 0 | 0 | 0 | 0 | NANO | https://note.com/solder_state/n/nf65437f12790 |
| No.12 Clock SYNC LFO | 2 | 4 | 0 | 0 | 0 | 0 | NANO | https://note.com/solder_state/n/n4c600f2431c3 |
| No.11 MIDI to CV | 4 | 1 | 0 | 0 | 0 | 1 | NANO | https://note.com/solder_state/n/n17e028497eba |
| No.10 Gate Burst/Delay | 4 | 2 | 1 | 1 | 0 | 0 | NANO | https://note.com/solder_state/n/n28b5c43229af |
| No.9 6ch trigger sequencer | 7 | 0 | 0 | 1 | 1 | 0 | NANO/SSD1306 | https://note.com/solder_state/n/n17c69afd484d |
| No.8 SX150 VCF | 3 | 2 | 1 | 0 | 0 | 0 | NANO/MCP4726 | https://note.com/solder_state/n/n5136d98930a8 |
| No.7 Quantizer | 4 | 2 | 1 | 0 | 1 | 0 | NANO/MCP4726 | https://note.com/solder_state/n/nde97a0516f03 |
| No.6 Clock multi divide | 4 | 2 | 1 | 0 | 0 | 0 | NANO | https://note.com/solder_state/n/n8907f2f6e8f5 |
| No.5 Generative sequencer | 3 | 2 | 1 | 0 | 0 | 0 | NANO/MCP4911 | https://note.com/solder_state/n/n8a489f0b857a |
| No.4 samplar | 3 | 1 | 1 | 0 | 1 | 0 | NANO/TF PLAYER | https://note.com/solder_state/n/n6057a5256042 |
Videos
- Hooking together modules
