Nonlinearcircuits (NLC)

NLC Dual VCO NLC's Dual OTA VCO is a dual tri-core VCO. Quite simple design, not great tracking or stability but decent enough and very usable.

Doof is a drum module. The design is typical of early 80s drum modules, best to look at the schematic to grok it. In this design, the VCO is a trimmed down version from the NLC dual OTA VCO and the...

The NLC Triple Sloths 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...

This is an upgrade for the NLC thru-hole dual LFO and the thru-hole dual VCO. The circuit is based on the thru-hole dual VCO but can be switched to operate in 3 ranges; 15Hz-10kHz, 1 minute per cycle...

This is a somewhat lazy design, but a nice easy build.. Basically grabbed the classic Jacky/Kirschman 555 ADSR circuit from 1980 and replaced the pots for Attack, Decay and Release with LDRs inside...

Doof is a drum module. The design is typical of early 80s drum modules, best to look at the schematic to grok it. In this design, the VCO is a trimmed down version from the NLC dual OTA VCO and the...

This module was developed from a paper by Tom Oberheim, presented at the Audio Engineering Society 1970 convention – A “Ring Modulator” Device for the Performing Musician. The paper...

This module is a voltage controlled PT2399 delay with sync out. The sync is fed to a clock divider and divided down 12 times to 1/4096. There is also a switch to run the clock divider as a regular...

Based on the Isolators on the SP-808. They are simple EQ filters, all manually controlled. The core circuit is based on a section of the PGM Isolator, don’t know where that came from, probably...

George is a Boolean logic module which can supply 6 different logic functions from the two inputs – OR, NOR, AND, NAND, XOR & XNOR. The logic functions are all obtained from 4011 NAND chips...

This is a solid VCO using the SSI2131 chip. It is very stable and will track nicely over 10 octaves. It has the stock outputs; saw, triangle and pulse, along with a pan-pulse waveform. Moldy Rapture...

Macrame is a 6 channel mixer with voltage controlled level and panning. It uses two SSI2190 chips to do all the work. You can use the SET pots to operate the level and pan manually, or use CV to get...

Logorrhea is kind of a vocal filter; basically it is the back half of a vocoder crammed into 8HP. There are two inputs, 10 filter channels, a white noise channel and a thru channel, to feed thru the...

This module uses the SSI2140 chip which is based on the SSM2040 VCF, with a few updates. The initial concept was to design a module that could switch between a phaser and a VCF. Looking back at...

This VCF uses two SSI2144 chips, which are based on ladder filters. It has outputs for each chip and a mixed output. Controls include the usual cutoff and voltage-controlled Q, along with...

Pseudo is a pseudo-random binary sequence/noise/tone generator based on ideas presented in Electronotes #76. It can be used in 2 ways: 1. Pattern generator supplying 4 different CV signals and 2...

32 to 1 or 1 to 32 multiplexor, or 32 stage counter, with clock in, reset and up/down controls. These can be used to route audio and/or CV signals.LEDs count in binary, so just 5 of them...rather...

10 stage Phaser/Flanger based on the Aries 329. It has 11 matched NPN pairs (BCM847) and a set of matched FETs. It is actually quite simple to match FETs, a circuit will be given in the build guide...

8hp Eurorack module Full kit includes everything you need. all parts individually bagged and labelled. For SMT parts, we have included a few extras in case you drop one. Tthis module does require...

The NLC 8-Bit Cipher is based on the one part of the Buchla Source of Uncertainty/Random Voltage source, although it has been modded somewhat to obtain 4 CV and 9 gate outputs. It requires a clock...

  NLC1008 ADSR312   Full DIY synth kit includes everything you need to build the module. all parts individually bagged and labelled. This module is based on the Aries 312 ADSR, which was...

  NLC1009 ARSEq   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...

  NLC1010 baDum TISSS BadumTisss is a snare/hi-hat module. The core sound of the circuit comes from the ring mod. Usually it will process the noise source and the VCO, but feel free to...

The bong0 is a twin-T based drum module with a LED acting as a nonlinear resistor to give it some interesting characteristics. The trigger input acts as a normal input to get your drum sound...

  NLC1012 Bools (C68 Aluminum Version) These are nice. The inputs can be any signal crossing 1V. The logic outputs give 5V gates that are all related to each other as made up of different...

Brain Custard - 9 audio rate chaotic signals mixed to form 'neuron clusters' The idea is low frequency patterns will emerge from the mayhem. Really it will be vaguely controllable noise and lots of...

  Nonlinear Circuits Cellular Automata 12hp This is a 16 cell gate and pattern generator using cellular automata rules 90 & 150. It will run thru a process driven by a clock signal and...

Has phase modulated sync & pan-pulse output based on the Aries PMS-338 VCO. Currently shipping v7 PCBs   Latest Documentation