I’m not really in business, but I do have extra PCBs and panels from fabrication orders sometimes, and sometimes some other synth-related stuff.

The following items are available. Inventory numbers are not necessarily up to date. Sales are to US residents only — sorry, just too much hassle otherwise! Shipping amounts are for purchase of a single item, quantity 1; shipping for multiple items or larger quantities will be more than that (but less per item). See below for how to order .

Kosmo module PCBs and panels

All modules are Kosmo format, PCB(s) and FR4 front panels (except where noted) only. You must source the components and do the assembly.

Photo Item name (click for details) Inventory Price (each) Shipping
Weirdness: 2 PCBs + 10 cm panel 2 $10 $4
Dual NLC Bong0: 5 cm panel only 3 $1 $4
Wave Displacer: 2 PCBs + 10 cm panel 1 $10 $4
Nuclear Decay: 5 cm panel only 4 $1 $4
Ringer: 1 PCB + 5 cm panel 3 $7 $4
JYE Tech Scope: 1 PCB + 10 cm panel 1 $7 $4
YuSynth Comparators: 5 cm panel only 3 $1 $4
Kassutronics Wavefolder: 7.5 cm panel only 2 $1 $4

Other stuff

Some other synth-related stuff I’d like to find a home for. Only one of each available unless otherwise noted.

Photo Item name (click for details) Price (each) Shipping
Kassutronics Slope PCBs only $6 FREE

To order

Email me (or PM me on the LMNC Discourse) and tell me:

  • Name and quantity of each item you want
  • Your name
  • Your email
  • Your postal address (street address, city, state, zip code; US only).

I will try to respond within a day to let you know if everything you requested is available and what the total cost including postage will be, and I’ll send you a PayPal link. All payments will be via PayPal and I think you will have to have a PayPal account. I will hold the items you request for up to 24 hours after I send you my response; if you need longer, email me. Once correct payment is received I will send your order out within a week, usually sooner. Shipping will be via USPS with tracking. All sales final.


Weirdness

PCB set and FR4 front panel (only) for a drone oscillator module. This module is in LMNC’s Kosmo format (20 cm high) and is 10 cm wide.

This is a module based on the Music From Outer Space Weird Sound Generator by Ray Wilson. It incorporates the two three-oscillator voices, essentially unchanged, but omits the filter (use your own filter module!). There are separate outputs for the two voices, as well as gate outputs driven by the low frequency (“Zany”) oscillator.

The user needs to source the parts and assemble them. (Photo of my own assembled module for illustrative purposes only.) Easy through-hole construction.

NOTE: Due to carelessness on the part of the fabrication company the order number is printed on the front side of the front panel, near the bottom.

Be sure to see the web page for more details, and the Git repository for build notes and other information.


Bong0

FR4 front panel (only) for a drum synth module. This module is in LMNC’s Kosmo format (20 cm high) and is 5 cm wide.

Use this with two Nonlinear Circuits Bong0 PCBs to create a dual twin-t drum module.

The user needs to source the PCBs and parts and assemble them. (Photo of my own assembled module for illustrative purposes only.) Part surface mount (0805 capacitors and resistors) and part through hole (everything else) construction.

Be sure to see the web page for more details, and the Git repository for build notes and other information.


Wave Displacer

2 PCBs and FR4 front panel (only) for a waveshaper. This module is in LMNC’s Kosmo format (20 cm high) and is 10 cm wide.

It takes an input signal (audio or CV) and alters it by vertically displacing sections of the waveform, or equivalently, by creating and adding pulse waves of the same frequency. The result is determined by five parameters, all of which are voltage controllable. Used with low frequency wave forms it can create more complex wave shapes for more exotic modulations; with audio signals it adds variable harmonic content.

In addition the module can perform other functions such as: Comparator, VCA, 3-channel mixer, gate controlled CV or audio switcher, source of complex low frequency or audio waveforms (periodic or aperiodic), or ring modulator.

The user needs to source parts and assemble them. (Photo of my own assembled module for illustrative purposes only.) Easy through-hole construction.

Be sure to see the web page for more details, and the Git repository for BOM, build notes, schematic, and other information.


Nuclear Decay

FR4 front panel (only) for a random envelopes module. This module is in LMNC’s Kosmo format (20 cm high) and is 5 cm wide.

This is designed for a version of TimMJN’s Geiger Counter Module . It uses a commercially available Geiger counter PCB to supply randomly-occurring pulses which it then converts into a decay envelope control voltage on one output and a trigger on the other.

The user needs to source the parts and assemble them. (Photo of my own assembled module for illustrative purposes only.) You can use a stripboard or protoboard. No layout is provided, but the circuit is simple and making your own layout should be easy.

Be sure to see the web page for more details, and the Git repository for build notes and other information.


Kassutronics Slope

PCB set only for Kassutronics Slope Eurorack module. Put it behind a Kosmo panel! Or, you know, Eurorack. Voltage controlled CV processor and modulation source. Through hole. Be sure to see the web page for more details.


Ringer

PCB and FR4 front panel (only) for a 4 quadrant multiplier synth module. This module is in LMNC’s Kosmo format (20 cm high) and is 5 cm wide.

The circuit takes three inputs, A, B, and C, and outputs A times B plus C. (Or really A times B, attenuverted and divided by 5, plus C, attenuverted.) It can be used to produce results similar to a ring modulator — complex sounds built from sums and differences of the input harmonic frequencies. It can also be used for more utilitarian purposes, such as a 2-channel attenuverting mixer (CV or audio) or a VCA.

The user needs to source parts and assemble them. (Photo of my own assembled module for illustrative purposes only.) Easy through-hole construction.

Video:

Be sure to see the web page for more details, and the Git repository for BOM, build notes, schematic, and other information.


JYE Tech Scope

PCB and FR4 front panel (only) for an oscilloscope synth module. This module is in LMNC’s Kosmo format (20 cm high) and is 10 cm wide.

This module is based on a JYE Tech DSO138 oscilloscope kit. Construction of the kit is adapted to make it serve in the format of a synthesizer module.

The main DSO board is mounted perpendicular to the front panel to minimize module width. The auxiliary circuit board provided here carries board mounted push buttons, switches, and trigger LED to replace those on the DSO board. Two input jacks are provided — one BNC, one 1/4" phone jack — with a switch to select. The signal from the latter is buffered and copied to another jack so the scope can be inserted into a patch without disrupting it.

Another switch controls power to the scope so the display can be turned off when not in use.

Power for the scope comes via a 9 V regulator from the Eurorack style synth power header.

The user needs to get the DSO 138 kit from Amazon (or other vendor) and source additional parts and assemble them. (Photo of my own assembled module for illustrative purposes only.) Easy through-hole construction.

Be sure to see the web page for more details, and the Git repository for BOM, build notes, and other information.


YuSynth Comparators panel

FR4 front panel (only) for a dual comparators synth module. This module is in LMNC’s Kosmo format (20 cm high) and is 5 cm wide.

This module provides a gate when an input signal goes above a threshold, and trigger outputs when the signal crosses the threshold going up and going down. There are two comparators in the module, with the first having a manually adjusted threshold from -8 V to +8 V, and the second using an attenuated CV as its threshold; with no CV plugged in, its threshold can be manually set from 0 V to +8 V.

This is only the front panel. The user needs to get the PCB by YuSynth from Soundtronics , and to source parts and assemble them. (Photo of my own assembled module for illustrative purposes only.) Easy through-hole construction.

Be sure to see the web page for more details, and the Git repository for BOM, build notes, and other information.


Kassutronics Wavefolder panel

FR4 front panel (only) for a wavefolder synth module. This module is in LMNC’s Kosmo format (20 cm high) and is 7.5 cm wide.

Designed to be used with the Kassutronics Wavefolder circuit board. Panel mounted pots and jacks are wired to the board mount footprints on the PCB.

This panel has holes for an additional pot and two additional jacks, for functionality beyond what is provided by the original Eurorack version. One jack is for an additional VCA control voltage. The other jack and the pot are for voltage control of the odd/even (symmetry) function. See the GitHub repository for instructions for these.

The user needs to get the PCB from Kassutronics (or other vendor) and source the parts and assemble them. (Photo of my own assembled module for illustrative purposes only.) Easy through-hole construction.

Be sure to see the web page for more details, and the Git repository for BOM, build notes, and other information.