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.

Item name (click for details)	Inventory	Price (each)	Shipping
Dual NLC Bong0: 5 cm panel only	2	$1	$4
Nuclear Decay: 5 cm panel only	3	$1	$4
Ringer: 1 PCB + 5 cm panel	1	$7	$4
YuSynth Comparators: 5 cm panel only	1	$1	$4
Kassutronics Wavefolder: 7.5 cm panel only	1	$1	$4
~~Hordijk Rungler: 2 PCBs + 7.5 cm panel~~	SOLD OUT	$10	$4
Plexquencer daughterboards only	1	$1	$1

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.

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.

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.

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.

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.

Hordijk Rungler

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

This is a chaotic control voltage sequence generator. It takes a Clock signal, telling it when to step, and a Data signal, which influences the generation of the sequence. Output is a sequence, repeating or not, stepping between eight voltages in the range ±9 V. Two other outputs give an on-off Gate and a XOR between Gate and Data. Knobs and switches allow varying the Data threshold, enabling or disabling Gate feedback, and adding an offset voltage to Data.

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 Git repository for BOM, build notes, and other information.

Plexquencer daughterboards

Pair of small daughter PCBs (only) for modifying the the LMNC 4051 Plexquencer module.

There are some issues with the Plexquencer design; these daughterboards are intended to address some of them. They should fix problems with the module requiring high amplitudes for the input gates, or failing to produce output gates under some circumstances, plus a flaky behavior when switching a stage from output 1 or 2 to off.

The user needs to source parts, as well as the Plexquencer PCB and panel (from LMNC), and assemble them. (Photo of my own assembled daughterboards and Plexquencer module for illustrative purposes only.) Easy through-hole construction.