Resonate

Resonate
PCB set - USD23
Panel - USD20
assembled - USD200

This uses the core circuit of the Korg 3100 Resonator, with component choices for the filter sections as per the mods introduced by RJB in his blog back in 2005.
The main difference of this version is that it has 4 VC bandpass stages and a feedback control, the original has 3 stages and no feedback. The 4 VC bandpass stages can be controlled by a single CV on input 1 (with an attenuator) or individually with each of the 4 CV inputs.
The CV processing sub-circuits are greatly simplified from the original Korg version, simply using op amps to drive the vactrols.
The 2 inputs are summed together. Out 2 is an inverted version of Out 1.

next week

2 resonators ready to go, just haven't had time to record them

Timbre & Timbre

This is simply a dual version of the Timbre!, which was based on the Buchla circuit. It is all smd (the single version is thru-hole) and the tri2sin circuit has been dropped, there is an input attenuator for each section.

The only changes to the original version are to fit the signal levels to Eurorack standard. The circuit will deliver some noise when there is no input signal so it is best to patch it directly to a VCO or patch a VCA downstream. The original Buchla Timbre was the waveshaping section of a VCO so there was always an input signal.

 


PCB set = USD23
Panel = USD20
assembled = USD210

Build info here

Greg's dual Timbre calibration vid here

blood_wolf_420 design

It just had to go on a t-shirt
EU store
US store

Bindubba Sequencer - Eurorack version

This is a re-boot of the bindubba3 sequencer which was originally released in March 2010, tho there have been a few changes since that version. The bindubba3 has no software or microprocessors on board, it is all CMOS, op amps and vactrols.
It is designed to be used with the Divide & Conquer.

This sequencer has 6 inputs to control the stepping. Two clock inputs control the count in horizontal and vertical directions. The two jump inputs send the next step somewhere else that depends on the 2^2 and 2^3 counts of the chips of both step directions......ie somewhat uncontrollable but it enables more complex patterns to be created. The two direction inputs change the direction of the count.

There are two voltage controlled slewed outputs, two CV outputs giving the same CV, 1 inverted CV output and 16 gate outputs.

PCB = USD28
28HP panel = USD32
assembled = USD320

Build guide is HERE

Limited edition black panels. I had a few of these made as a special request. Be quick. sold out

Covfefe buss board

This buss is designed for use with the small PSU board.
It has 10 connectors, space for decoupling caps, LEDs, 8 mounting holes and spade mounts. It has connections at both ends so that it can be daisy chained. The PCB is 2mm thick to reduce flex when plugging/unplugging.

USD15

Hyperchaos Deluxe

PCB set = USD23

Panel = USD22 
assembled = USD220

Hyperchaos Deluxe is based on the description in A UNIQUE SIGNUM SWITCH FOR CHAOS AND HYPERCHAOS by C. Li et al and is an expansion of the circuit used in Primal Hyperchaos. 

There are 10 different CV outputs and 2 gate outputs. 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. 

The Rate input can be used in a few different ways:

1. With nothing patched in the circuit operates in slow mode

2. With a cable patched in, but its other end hanging loose, the circuit operates in fast mode.

3. Feed a gate signal to the Rate input and the circuit will vary between fast and slow modes (gate high = slow)

4. Feed a fast clock signal and you can get the circuit to operate at different speeds. This is quite dependent upon the frequency of the incoming clock and can take some tweaking to get right. If the clock is too fast it will mainly appear to be in slow mode.

Probably 3 is the best option as you can have the CVs cruising along and then suddenly going nutso when the gate ends.

Not my video but a great track using the Hyperchaos Deluxe

Sly Grogan

PCB = USD18
Panel = USD20
assembled = USD170

SLY GROGAN is an envelope generator based on the design in Electronotes #86. It can produce a wide variety of different envelopes and bursts, perhaps most interesting is the ability to have the envelopes ringing after the attack stage. It also works well as a voltage controlled LFO, tho the module is neither a LFO nor a regular ADSR.

Please note: it no longer contains a VCA, this was dropped in favour of tapping the extra outputs (2&3).

Nice run-thru by Learning Modular:

Divide & Conquer

PCB set = USD22
panel = USD20
Assembled = USD190

This is a clock divider module containing 4 different dividers:

1. /2, /4, /8, /16, /32, /64, /128, /256
2. /1.5, /3
3. /2.5, /5
4. /3.5, /7

All sections will run off a signal patched into section 1.
The module can be patch-programmed to obtain other divisions. For example; patch output /2 into section 4 to get divide by 14 from the /7 output.
The circuit is CMOS based and contains no microprocessors.

This module is intended to be a companion module for the Bindubba Sequencer.
Yes, the first run of panels has an invisible '64'.

Demo from Steve.
Notes:
0:00 Drums with Math
Clock IN -> C&D main IN
C&D /2 --> Doof
C&D /3 --> baDumTiss1 (with Square wave into IN)
C&D /4 --> baDumTiss2
C&D /5 --> bong-0

0:32 Drums with Logic
Clock IN -> C&D main IN
C&D /"5" --> Self patch into lower left IN (7/2)

C&D /"3/2" --> BOOLs IN1
C&D /"7" --> BOOLs IN2
C&D /"3" --> BOOLs IN3
C&D /"3/2" --> BOOLs IN4

BOOLs 1:2 --> Doof Trig
BOOLs Slew --> Doof CV

BOOLs 3:4 --> baDumTiss1Ttrig
BOOLs 4:1 --> baDumTiss2Ttrig
C&D /"4" --> bong-0

1:03 Clock da envelopes
Clock IN -> C&D main IN

C&D /"16" --> Self patch into lower left IN

C&D /"4" --> VCA5 IN
C&D /"32" --> VCA5 CV
VCA5 out --> Env1 trig --> VCA1 (PoD Saw)

C&D /"32" inverted --> Env2 trig --> VCA2 (VCO Tri)

C&D /"8" --> Env3 trig --> VCA3 (PoD Tri)

C&D /"5" --> VCA6 IN
C&D /"7/2" --> VCA6 CV
VCA6 out --> Env4 trig --> VCA4 (PoD Pulse)--> BP Filter
C&D /"7" --> ADSR trig --> BP Filter CV

1:38 Octaves
VCO Square wave -> C&D main IN

VCO Square wave --> Mixer
C&D /"2" --> Mixer
C&D /"4" --> Mixer
C&D /"8" --> Mixer

1:53 Harmonic ratios
VCO Square wave -> C&D main IN

VCO Square wave --> Mixer
C&D /"3" --> Mixer
C&D /"3/2" --> Mixer
C&D /"2" --> Mixer

2:08 Chord-like drone
VCO Square wave -> C&D main IN

C&D /"3/2" --> Self patch into middle left IN (below /"3")

C&D /"2" --> VCA1
C&D /"3" --> VCA2
C&D /"5/2" --> VCA3
C&D /"5" --> VCA4

Feague OUT0 --> VCA1 CV
Feague OUT90 --> VCA2 CV
Feague OUT180 --> VCA3 CV
Feague OUT270 --> VCA4 CV

VCA1 + 3 --> Output Left
VCA2 + 4 --> Output Right

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: