Saturday, 22 July 2017

Bill's cellF synth

This is the last Voice panel (still a few Action panels left). Bill put it into a nice case (design and laser cutting by nathanxl:




Sunday, 16 July 2017

New merch designs

For Australia - go here
For EU -  go to EU Spreadshirt
For North America and everywhere else - got to US Spreadshirt

 For most items you can choose your own colours



Thursday, 13 July 2017

PRIMAL - Hyperchaos

PCBs - USD18
Panels - USD20

Hyperchaos circuit based on a paper by C Li, et al. It can be built to run at different speeds simply by installing different capacitors. Very easy build, no special components needed.
There are 5 different CV outputs and 1 gate output. The CV IN is associated with the CLIMAX pot which determines how high the peaks go. The module can be greatly influenced by the CV in signal and can exhibit some fairly nutty responses at times.

Build guide & BOM










Tuesday, 4 July 2017

ARSEq - 10HP eurorack version

Panel = USD22
PCB set = USD23

Build guide & BOM

Panel template





The ARSEq ( = Attack Release SEquencer) is, as the name implies, a hybrid sequencer and AR envelope generator. It contains a counter circuit with reset, 4 envelope generators and a mixer/inverter stage to get the sequenced output. The envelopes can be inverted if desired to give a greater voltage and complexity range of the output sequence. The individual 4 envelopes are available on the panel as well.
The main difference with this circuit and a regular EG is each envelope requires 2 clock pulses, one to start the attack and the next to start the release stage.
Yes the pots on the panel are a bit tight at 10HP, I should have made it wider, maybe I will one day?











Thursday, 25 May 2017

Divine CMOS returns

This is a slimmed down and modified version of the 4U Divine CMOS.
It can be used as a CV pattern generator with slew, frequency divider, gate pattern generator, envelope follower and a ring modulator that provides sub-harmonics that can be mixed together to create new sounds.
PCB - USD18
Panel - USD20







Small PSU PCB

...what a lame name, I was gonna call it 'hard candy' but can't be bothered. It was designed to power stand-alone Null-A panels.
Anyway, its about a simple PSU as you can get. Runs on 7812 and 7912 to give +/-12V. If you bolt them to a nice big heatsink, you could even get 1A per rail (using 1.5A spec'd regulators).

This PSU is powered by a 12VAC wallwart, so no need to wire any mains voltages.

The design is a slimmed down version of a PSU we use in the WAMod workshops, the only differences are:
  • only 1 eurorack connector instead of 7 
  • no 5V section
  • holes for installing spade connectors
so keeping these differences in mind please refer to the WAMod PSU build guide when putting this together.

USD8 each



Tuesday, 23 May 2017

Plague of Demons - thru0 VCO

PCB set - USD26
panel - USD24

available now

Build guide and panel template

This VCO uses DG202 (or equivalents) analogue switches to achieve the thru 0 function, based on ideas presented in Electronotes EN#75.
Very nice demo of sounds by Steve:













Tuesday, 11 April 2017

Coming soon - small PSU

Although I never actually listed it for sale, there is a NLC PSU board with seven 16 pin connector points. It runs off a 12VAC wallwart and uses LM7812 & LM7912.
Anyway, mainly for stand-alone Null-A builders, this is a slimmed down version.

note the comma.


Coming soon - Divine CMOS

New version of Divine CMOS - clock divider, ring modulator/sub harmonic generator, CV and gate pattern generator/sequencer



Coming soon - Sly Grogan

Ringing transient envelope generator & VCA



Coming soon - A Plague of Demons

thru 0 VCO




Sunday, 9 April 2017

Sandpaintings - Penalty Kicker

Lots of short, interesting tracks and sketches made using NLC modules.
Thanks Pieter.

LISTEN HERE

Saturday, 11 March 2017

Superbooth 17 Berlin 20-22 April

Nonlinearcircuits Null-A will be at Superbooth 17, Booth E273. The booth was booked by Gareth of Oscillosaurus, who kindly offered to share the space to help promote other Australian Eurorack manufacturers.



btw - cellF will be performing in Berlin on May 12, 13 at HKW

Friday, 10 March 2017

NULL-A................2



Null-A2 is an all-in-one analogue synth packed into 42HP. 
PCB set (2) - USD50
Panel - USD50 
'B-stock' aluminium panels with free scuff marks - USD40
Shipping for these will be USD20 (includes tracking & signed delivery)

I will start selling assembled units from late May, expect USD550.

It features:


2 VCOs
1 state variable VCF
1 ladder VCF
1 VC Delay
3 VCAs
2 LFOs
Mixer
Headphone amp
Sequencer
Clock Divider
Sample & Hold (S&H)
Sloth chaos generator


It does not feature MIDI, micro-processors or any software. 

Current draw:
+12V rail - 135mA
-12V rail - 90mA

There are several presets that run between the switches of the jacks. If you insert a patch-cable into either jack the preset is disconnected.



The interesting one is the signals from the Sequencer, Sloth chaos and Tri from LFO2 are mixed and fed to the S&H sample input. This means it is continually generating stepped and smooth CVs (for there is a Slew pot) that are different but related to everything else that is going on.

The Clock Divider gives divisions of /2, /8, /32 and /128. 

The Sequencer has 4 stages but the direction control can be used to make it count forwards and backwards enabling more complex sequences. In normal operation, the ‘x’ output gives the CV generated by the stages 1 thru to 4, meanwhile the ‘y’ output will give a CV signal generated by stages 4 thru to 1.

The VC Delay can be used to generate reverb type sounds but can also be pushed into making all sorts of unexpected zipper noises and effects when the Time and Feedback pots are turn high.

The third VCA is built into the input of the Ladder VCF. If nothing is patched into the ‘CV VCA’ input, the VCA is always on. 

The Sloth Chaos is a very slow CV generator, it can be used to liven up a patch and create slowly evolving sounds. It cannot be controlled, it does what it wants.

I have a batch of aluminium panels that have minor scratches or scuff marks on them, usually just a couple and not particularly bad, so these are available for USD40 until sold out. Please specify 'B-stock panel' when ordering.













Envelope Follower

This Envelope Follower PCB was developed for use in the cellF synth, it is based on the design in the Buchla Easel. Obviously it has a few changes; a gain pot rather than a hi/lo switch and a gate output. It is a wonderfully sensitive and expressive EF, that works nicely with regular microphones and guitars.
The 1/4" jack connects to the switch of the 3.5mm input jack, the outputs are pre-amp (20x gain), envelope and gate. The LED indicates when the gate is on.
note: the panel shown is just a proto-type.



PCB - USD8
Panels - coming soon




Friday, 6 January 2017

8HP Triple Sloth



This module contains 3 Sloth chaos circuits. Each one runs at a different rate; Torpor takes approx. 15-30 seconds to travel around 2 strange attractors, Apathy takes 60-90 seconds and Inertia takes 30-40 minutes.
There are no controls for Inertia, it does what it wants.
The pots for Apathy and Torpor do not specifically alter the frequencies, rather the weight of the outputs. Various settings will cause the signals to spend more time travelling around one strange attractor rather than the other.
Apathy and Torpor also have CV inputs. Sometimes the CV signals are injected onto the chaotic signals but depending upon conditions may cause windows of periodicity or voltage jumps. Generally the results are good.
The X, Y & Z outputs for each Sloth are taken from different stages of the circuit and are all different to each other, although Z is simply the inverted version of Y. The three Z outputs are also fed into a Difference Rectifier and the results of this are available from the + and – outputs at the bottom of the panel. The Difference Rectifier outputs are (ignoring diode voltage drops):
out + = VApathy +VInertia - VTorpor  If greater than 0, otherwise 0
out - = VApathy +VInertia - VTorpor  If less than 0, otherwise 0

 PCB set (2) - US$24
Aluminium Panel - US$20
assembled - US$210

This is not a suitable build for beginners, if you are new to synth DIY, I suggest you get the thru-hole single Sloth.