Friday, 2 November 2018

Balter - Dual VC Gate Delay

Are your beats tighter than a gnat's chuff? Whynot loosen off that ponytail and balter with a VC gate delay?

CV controlled delay ranges from 7 milli-seconds to 1 minute.

PCB - USD15
8HP panel - USD20
assembled - USD150

Build guide on NLC wiki


Tuesday, 30 October 2018

The Big Room (Reverb)

This module merges the Polyfusion reverb driver circuit with the NLC Segue for VC panning between wet and dry signals. It also has a VC feedback circuit....be careful with that one 😁

The driver circuit was used in the NLC CellF Voice panel, I always liked it and received good feedback from people who owned these panels, so stuck with the design. The downside is it rquires a particular reverb tank, which is easily available for USD19, so not really a big deal. Builders could try experimenting with the driver circuit to make it work with other tanks but imho it sounds thick and cavernous with the tank it is designed for.

The PCBs form a giant vactrol case for the LDRs used in the panning circuit. 

Build Guide and other info on the NLC wiki

PCB set = USD24 
Panel = USD22 
assembled = USD200 (Reverb tank not included, it will be much cheaper to order your own directly from the supplier) If in EU, maybe cheapest from here.









Thursday, 4 October 2018

Dual LPG

Dual Low Pass Gate - pretty standard except it uses the black box vactrol method seen in the Shat-noir Phaser and Noiro-ze VCF/VCA. DG analogue switches are used for changing between filter and gate modes.

PCB set = USD24 
Panel = USD22 
assembled = USD200




soundcloud demo by Steve



Thursday, 30 August 2018

Noiro-ze VCF & VCA

This module uses the same blackbox technique as the Shat-noir Phaser.
The VCF is based on the Steiner diode VCF but this one uses LDRs rather than diodes and a CV control system to suit. The nice thing about this filter is you can feed different signals to the LP, BP & HP inputs then surf between them with your CV, quite different from regular filters.
The VCA is really there to use up a spare op amp and is based on the Korg PS3100 VCA, works very well for what it is. 

PCB set = USD24 
Panel = USD22 
assembled = USD210

Build guide and other info on the NLC wiki











Tuesday, 31 July 2018

Shat-noir Phaser

The core of the Shat-noir phaser is based on classic LDR based phaser designs, notably the Carlin, Compact Phasing A, Morely Phaser and ADA final Phase. The CV drive is an anti-log circuit, it works a little differently as both the CV and phase pots must be adjusted to find the sweet spots. The In2 pot is 0 at centre, the incoming signal is inverted below that. it is intended as a feedback input for one of the stage outputs, but shove in whatever you want of course. 

Please note the build pictures below when constructing to make the box fairly light-proof. A little bit of leakage does not seem to matter much but you could add a bit of black silastic sealant around the edges if you really want to. When soldering the connector pins, use the SIP connectors, jumped across 1 or 2 pins (see pics) to ensure they are nicely perpendicular to the PCB. When soldering the PCB to PCB connectors, I press lightly on the PCB to help keep the connectors tight against the board. 

The PCBs are 2mm thick with black soldermask to prevent light getting in. Also, please note the pots go on the side of the PCB that has the pot symbol screenprinted, this is different to previous NLC PCBs……I try to conform, its hard, really hard. Anyway look at the pics to make sure. 

Soundcloud demo by Steve

PCB set = USD24 Panel = USD22 assembled = USD220

Buildguide here














Friday, 13 July 2018

Mogue mixer & VCA

MOGUE is a VCA and Mixer inspired by early Moog designs, with some mods to get them into ‘Eurorack standards’ (!). Both circuits can be overdriven to get some wave-shaping action. The mixer can handle CV and audio but the VCA is audio only (tho feel free to place links instead of the capacitors to make it work for DC). Some users consider these 2 modules are an inherent part of the legendary Moog sound…maybe; I just wanted to use up all my LM394.
Build info HERE

PCB set  = USD23
Panel = USD20
assembled = USD190








Wednesday, 23 May 2018

It's 555 .... resonator (Eurorack version)

This is a set of five 555 based one shot circuits.
Each has CV and pot controlled pulse width and the pulse for each can be set to be negative going or positive at any desired amplitude. The circuit is supposed to be driven by a signal from a VCO, but noise or chaos sorces are fun too. It creates five pulses that can be individually manipulated to create a complex and harmonically rich waveform. A slower clock signal will give clicks and glitches (so, a voltage controlled glitch module).
As the pulse widths can be individually controlled (or controlled en masse by “CV all”), this waveform can be continually morphed to get new sounds. When the 5 pulses are quite thin the effect is that of a resonator. The controls allow a wide pulse width, so fatter, thicker sounds can also be created.
PCB = USD20
Panel = USD24
assembled = USD230 









Tuesday, 22 May 2018

Kareishuu VCO

PCB set = USD23
10HP Panel = USD22
assembled  = USD210

This VCO was mainly designed as an upgrade for the dual OTA VCO. It is a traditional triangle core VCO with a built in VCA for the FM control section. The design draws on sections of the Electronotes EN1, EN2 and EN3 VCOs along with some NLC injected in there for good measure.
It has much better tracking, a sine output and attenuators for all inputs. The self modulation control via the FM VCA enables voltage controlled waveshaping, the sine and tri waves can morph between their original shape to a pulse.

The pot spacing is quite tight, so I suggest using T18 knurled shaft pots along with the micro knobs. Other than the 1k tempco, no rare parts and a fairly easy build.






Friday, 27 April 2018

STATUES

PCB = USD18
Panel = USD20
Assembled = USD160

Not trying to get all MI-y with the name, it comes from the children's game also known as Red Light Green Light.

This is a 1 to 8 multiplexor....or multiplexer if you prefer....with a thru and hold circuit attached to each output. the active output is chosen by whichever combination of the x00, 0x0 & 00x inputs is high. You can put any signal into these, crossing 1V will send it high. In the demo video, I used the /2, /4 & /8 outputs from a Divide & Conquer which gives it a regular 1-8 count. Using any old signals will give a more random effect but patterns will still emerge.
IN is the signal getting processed.
This module can be used to process CV and/or audio signals.

Build guide and panel template on the NLC wiki






The 1st part of a video shows a sine wave being re-constructed when the 4 outputs are aligned on the 'scope.

Tuesday, 10 April 2018

Ian Fritz's Hypster

Ian Fritz designed an awesome hyperchaos circuit and gave me the go ahead to let it loose on Eurorack.
You can read the discussion on this design on the muffwiggler thread
This is Ian's introduction in his article on the circuit: The Hypster is an electronic fourth-order hyperchaos generator for use in modular electronic music systems.
Hyperchaos is chaos on steroids, with the mathematical divergences being generated in more that the usual single dimension. The module is a unique, original design featuring voltage control of the main system parameters.
In synthesizer applications this module can produce signal waveforms varying from simply periodic to complicated multiperiodic to extremely dense and complex, both in the low frequency control range as well as up into audio frequencies. With an eight-signal output it can simultaneously control a large number of synthesizer parameters or generate multiple audio waveforms for individual processing.
The circuit is built around four voltage-controlled integrators connected in a ring, similar to the configuration of an oscillating ladder filter. But that is where the similarity ends. Each integrator includes damping, making the system more like the 6/8 phase oscillator described on my website. Most importantly, special circuit elements between the four integrators provide the nonlinearities required to produce chaotic oscillations. The gain and resonance of one of the stages may be varied. Varying these parameters produces a wide range of periodic and chaotic signals. These
parameters, along with the overall oscillation rate are under voltage control. 


It is very wide ranging, from approx 3kHz down to 5 minute orbits, capable of a huge variety of patterns and is particularly partial to being controlled by various CV signals.

PCB set = USD26
White Panel = USD24
Black Panel = USD25
'B' stock black panel = USD20 (these have some very minor defect; scratch or dust under soldermask)
assembled = USD250