Land Boards Synth Components
Contents
Synth Modules
- Synthesizer interfaces and modules
- MIDI-IN-OUT - MIDI In/Out
- SCF-2 - Dual 3.5mm Audio Jacks (Scale, Clip, Filter_
- SYNTH-VCO-01 - Synth Voltage Controlled Oscillator
- SYNTH-MIDI-CTL-01 - Synth MIDI Controller
- SYNTH-MIDI-CV4-01 - 4 Output MIDI to CV controller
MIDI-IN-OUT
- MIDI-IN-OUT - MIDI In/Out
- MIDI In/Out Jacks
- 5V MIDI
- 3.3V or 5V Serial connections
- MIDI In is opto-isolated
- (2) 4-40 Mounting holes
SCF-2
- SCF-2 - Dual 3.5mm Audio Jacks (Scale, Clip, Filter)
- Digital Inputs or Outputs
- (2) 3.5mm Jacks
- Scaling resistors
- Schottky Clamping Diodes
- Filter cap
- Ring pin brought to connector
- Ring pin is not used in Synth applications
- Card can be used as a 3.5mm breakout
- (2) 4-40 mounting holes
SYNTH-VCO-01
- SYNTH-VCO-01 - Synth Voltage Controlled Oscillator
- Build of Pico VCO by HAGIWO
- Digital Voltage Controlled Oscillator (VCO)
- Three modes: Wavefold, FM and AM
- PWM output with 2 pole low pass filter
- Each mode has eight built-in waveforms
- XIAO RP2040 CPU
- (5) Pushbuttons
- Octave Up/Down
- Mode Up/Down (Wavefold, FM and AM)
- Push Timbre switches between 8 waveforms
- (2) Knobs
- Freq fine adjust
- Mod adjust
- Standard EuroRack 16 pin header
- Supports 12V in with on-board 5V regulator
- 5V regulator can be not installed if 5V is available on EuroRack connection
- Card is not a Eurorack card
- Probably too deep, needs cabling
- (4) 6-32 mounting holes
- Stacks with SYNTH-MIDI-CTL-01 card
SYNTH-MIDI-CTL-01
- SYNTH-MIDI-CTL-01 - Synth MIDI Controller
- Adapted from HAGIWO's MIDI to CV module
- Translate from Japanese to English using browser
- XAIO RP2040 CPU
- Arduino MIDI library has not yet been ported to Pico so will need to use CircuitPython
- MIDI In/Out
- Standard MIDI Jacks
- MIDI out jack for future functionality
- (2) 0-5V Analog CV outs
- MCP4822 12-bit D/A - SPI Interface
- Use with SYNTH-VCO-01
- CV1 = V/OCT
- CV2 = MOD
- (2) Digital Outs, eX:
- Gate
- Clock
- Pot supports setting Clock rate
- Standard EuroRack 16 pin header
- Supports 12V in with on-board 5V regulator
- 5V regulator can be not installed if 5V is available on EuroRack connection
- Card is not a Eurorack card
- Probably too deep, needs cabling
- (6) 6-32 Mounting holes
- Stacks with SYNTH-VCO-01 card
SYNTH-MIDI-CV4-01
- SYNTH-MIDI-CV4-01 - 4 Output MIDI to CV controller
- Adapted from HAGIWO's MIDI to CV module
- Translate from Japanese to English using browser
- Removes Digital Outputs
- Has 4 Analog Outputs instead of 2
- XAIO RP2040 CPU
- Arduino MIDI library has not yet been ported to Pico so will need to use CircuitPython
- MIDI In
- Standard MIDI Jacks
- MIDI out jack for future functionality
- (4) 0-5V Analog CV outs
- MCP4822 12-bit D/A - SPI Interface
- Use with SYNTH-VCO-01
- CV_1 = V/OCT
- CV_2 = MOD
- Standard EuroRack 16 pin header
- Supports 12V in with on-board 5V regulator
- 5V regulator can be not installed if 5V is available on EuroRack connection
- Card is not a Eurorack card
- Probably too deep, needs cabling
- (6) 6-32 Mounting holes
- Stacks with SYNTH-VCO-01 card
6 Channel Mixer
- SYNTH-MIXER6-01
- Eurorack 6HP
- Adapted from HAGIWO's 5 Channel Mixer Module
- Views: Front (controls), Parts side, Front Panel
RP2040 VCO
- SYNTH-VCO-03
- Eurorack 6HP
- (3) Card set
- Views: Control Panel rear side, Control Panel controls side, Logic card component side, Logic card rear side, Front Panel
Eurorack +/- 12V Power Supply
- 115VAC in, 24V CT, 24 VA Transformer
- 12*1.414 = ~17V
- Leaves 5V for regulator headroom and ripple
- 12*1.414 = ~17V
- L7812CV, +12V, 1.5A Regulator
- L7912CV, -12V, 1.5A Regulator
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
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
- graybloomfield - Very nice Arduino based designs
Module Kits
- Erica Synths
- SyntherJack - DIY Synths
- BEFACO - Kits
- Kassutronics DIY Store
- Kassutronics DIY GitHub
- Music From Outer Space
- Thonk Shop - in UK
- synthrotek
Software
- adafruit_midi CircuitPython API
- MIDI Controller in Python
- MidiEditor
- Convert binary files to C data arrays (Arduino) - In Japanese
- Binary to C Array
- Arduino Mozzi Library
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;
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