Difference between revisions of "Land Boards Synth Components"

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== MOD Designs ==
 
== MOD Designs ==
  
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* Good for prototyping, but not Eurorack
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[[Synth Mod Designs]]
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* Stackable via standoffs
 
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* 100mm wide
 
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* 47mm deep
 
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* 4-40 mounting holes
 
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=== MOD-SCF-JACKS ===
 
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[[MOD-CF-JACKS]]
 
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[[file:MOD-SCF-JACKS_FRONT_3D.png]]
 
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[[file:MOD-CF-JACKS_FILTER_J5.PNG]]
 
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[[file:MOD-CF-JACKS_FILTER_SCHEM.PNG]]
 
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=== MOD-DIY ===
 
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[[MOD-DIY]]
 
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[[file:MOD-DIY_FRONT_3D.png]]
 
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* DIY "breadboard"
 
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* Rear pins bs to top/bottom
 
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* Extra connections on edge
 
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* Busses marked on silkscreen
 
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* (2) Horizontal busses in center for power/ground
 
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=== MOD-MIDI-THRU ===
 
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[[MOD-MIDI-THRU]]
 
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[[file:MOD-MIDI-THRU_FRONT_3D.png]]
 
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* DIN-5 in
 
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* (4) TRS Type A outs
 
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=== MOD-NANO-CPU ===
 
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[[MOD-NANO-CPU]]
 
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[[file:MOD-NANO-CPU_FRONT-3D.png]]
 
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* Arduino NANO
 
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* Runs [https://sensorium.github.io/Mozzi/ MOZZI Arduino library]
 
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** MOZZI audio output
 
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** Standard or HiFi
 
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* MIDI In on TRS Type A
 
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* Remove J4 (EN_MIDI) when USB is plugged into NANO CPU
 
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=== MOD-POTS ===
 
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[[MOD-POTS]]
 
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[[file:MOD-POTS_FRONT_3D.png]]
 
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* 4 pots
 
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** Type A = "Audio" log pots
 
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*** Used for Volume controls
 
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** Type B = Linear pots
 
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*** Used for CV
 
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* All pins brought to connector
 
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* Headers to optionally pull pot ends up/down
 
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* Can be used as controls (end pulled up/down or volume controls (CW, CCW brought to pins)
 
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* Optional R/C filter
 
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=== MOD-XIAO-RP2040-CPU ===
 
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[[MOD-XIAO-RP2040-CPU]]
 
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[[file:MOD-XIAO-RP2040-CPU_FRONT-3D.png]]
 
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* XIAO RP2040 CPU
 
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* MIDI In on TRS Type A
 
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* (4) Analog Inputs or Digital GPIO
 
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* (7) Digital GPIO
 
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* SD Card on RP2040 SPI bus
 
  
 
== Box Build ==
 
== Box Build ==

Revision as of 14:32, 26 October 2022

Eurorack Plywood Box 02 cropped-720px.jpg

Synth Modules (Standalone)

MIDI-IN-OUT

MIDI-IN-OUT REV1 FRONT 3D.png

  • 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)

SCF-2 REV 1 FRONT 3D.png

  • 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 REV1 FRONT 3D.png

  • 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

SYNTH-MIDI-CTL-01

SYNTH-MIDI CTL-01 REV1 FRONT 3D.png


  • 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
  • (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

SYNTH-MIDI-CV4-01

SYNTH-MIDI CV4-01 REV1 FRONT 3D.png

  • 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
  • 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

Eurorack Modules

ER-ADSR-555-01 - Eurorack ADSR Module

ER-ADSR-555-01

ER-ADSR-555-01 Set.png

  • Attack-Delay-Sustain-Release Eurorack ADSR Module
  • 555 Based design
  • Benjie Jiao MiniADSR
    • Original was based on Barry Klein design
    • As built by schmitzbits design - "The Fastest Envelope in the West"
    • A, D, and R Pots should be log pots
  • Pot silkscreen should show DECAY not DELAY

ER-CV-POTS-5

SYNTH-CV-POTS-5 REWORK ANNOTATED rear.png

  • Provides 5 Control Voltage Pots for manual control and testing of CV inputs
  • Use SYNTH-MIXER6-01 card with rework
    • Do not install Opamp
    • Do not install any passives
    • Clip J2-J7 tip switch pins (edge of card) - verify grounds removed
    • Hacksaw off top of card - J1-J2, RV1-RV2
    • Cut etches from J3-J6 (tip) to RV3-RV6 (bottom pin)
    • Add wires J3-J7 (tips) to RV3-RV7 (center pins)
    • Add wire U1-7 to U1-2
    • Fill holes J8 pins 1,2
    • Install 2x4 header in J8 (pins 3-10)
    • P-Touch labels
      • Label over top 2 holes "CV-POTS-5"
      • Relabel next 5 holes as CV1-CV5
        • Blank label over bottom 2 holes
      • Label end of J8 "CV+"
  • Re-build as 4 channels on ER-PROTO-01
    • Buffer outputs with Op Amps
  • Could power from either 5V or +/-12V

ER-MIDI-CV4-01 - Eurorack 4X CV Module

ER-MIDI-CV4-01

ER-MIDI-CV4-01 SET 3D-720px.png

ER-MIDI-THRU - Eurorack MIDI Thru

ER-MIDI-THRU

ER-MIDI-THRU SET-3D-720pxV.png

  • MIDI In on DIN-5 or 3.5mm TRS Type A
  • 4 Channel MIDI outputs on 3.5mm TRS Type A
  • Activity LED
  • 6 HP wide (30mm)
  • 3U tall
  • Eurorack power jack
    • Uses 5V

ER-MIXER5-01 - Eurorack 5 Channel Mixer

  • ER-MIXER5-01
  • Eurorack 6HP
  • Adapted from HAGIWO's 5 Channel Mixer Module
  • Separate individual input pots and output pot
  • Use A taper pots to mix audio signals
  • Use B taper pots to mix control voltage signals
  • Views: Front Panel, Front (controls), Parts side

SYNTH-MIXER5-01 SET FRONT 3D-720pxV.png

SYNTH-MIXER6-01 - Eurorack 6 Channel Mixer

  • SYNTH-MIXER6-01
  • Eurorack 6HP
  • Adapted from HAGIWO's 5 Channel Mixer Module
  • Rear card is too tall to fit in rack between rail
  • Hacksaw off top of card - remove J1, J2, RV1, RV2 to make 4 in mixer
    • Too tight at the bottom, need to hack off J2, RV2
  • Move up holes when mounting card to panel
  • Views: Front (controls), Parts side, Front Panel

SYNTH-MIXER6-01 SET FRONT 3D.png

ER-PROTO-01

ER-PROTO-01

ER-PROTO-PANEL-01-SET FRONT REAR-3D-720px.png

  • Eurorack Prototyping card set
  • 6 HP wide (30mm) front panel
  • 3U tall
  • 0-6 POTS
    • Series resistors on pot wiper
    • All 3 pot pins brought to top header
  • 0-4 Jacks
  • Tip/sleeve brought to header near middle/bottom
  • Pots on top, jacks on bottom
    • Easier to adjust pots without bumping into pots
    • Pots more often accessed than jacks
  • Large prototyping area
  • +12V, -12V down board edges
  • 5V/GND down center of card
  • Bussed connections horizontally
  • Front Panel with generic labels
    • Cover with White on Black P-Touch labels

ER-VCA2-01 - 2 Channel Voltage Controlled Amplifier

ER-VCA2-01-CTRLS REV1 SET-3d-720PX.png

  • Dual VCA
  • Adjust between VCA and Mod
  • 3U tall
  • 6HP wide
  • 3 card set
  • LM13700 based
  • Eurorack
  • +/- 12V Power, 10-pin power connector

ER-VCF-01 - Voltage Controlled Filter

ER-VCF-01

ER-ER-VCF-01-SET-3D-720PX.png

ER-VCO-03 - Eurorack RP2040 VCO

  • ER-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

SYNTH-VCO CTL-01-CARD SET-3D.png

Eurorack +/- 12V Power Supply

DUAL LINEAR PS SCHEM.PNG

Eurorack DIY Panel

  • Front/Back View
  • Left = top

EUROPANEL-6HP rev1 front rear-3d.png

  • Based on HAGIWO design

  • 6HP wide
  • 3U tall
  • Power and Ground bus on either side of the card
  • Reduces wiring
  • Slotted mounting holes
  • 5mm Grid on rear side makes it easier to locate connectors for drilling

MOD Designs

Synth Mod Designs

Box Build

Eurorack Box Build

Reference Docs

Projects

KiCad Libraries

Other Notes

Daughterboard Heights

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

Software

Hardware/Parts

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

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