Wednesday, 1 October 2014


Chopper - expected this week. This is an analogue switch on steroids. The concept came from a 60s chopper modulator circuit. It can be used as a VCO, a VCF, a waveshaper, ring modulator, analogue switch, LFO and VC gate generator....probably more. It can switch between two input signals with the actual input signals deciding when to switch, or the change can be VC or manually controlled. There is also a bi-directional switch as a separate circuit on the same PCB. this is functionally the same as the early Serge bi-di Router but uses a DG411 analogue switch rather than a 4007 to do the work.

FF chaos

FF Chaos (flip-flop) -Should be here in 2-3 weeks. This is another chaos module but designed to supply a variety of gates and triggers. It is self running but can be synced with the gate/trigger input. There is also a CV input which shifts the output between periodic and chaotic behaviour. There are two CV outputs, one trigger output and three gate outputs which supply different and varying gates that can be delivered in bursts......this thing is simply nuts

Hyper Wien and Chopper panels

waiting for the PCBs

mixer & headphone amp

This is a 3 input mixer with a minijack and 1/4" output as well.
The headphone amp has its own input and volume control. This way you can monitor a single patch and set it up whilst other patches are fed to the PA. If nothing is inserted into the headphone input, then the mixer output is routed to the headphones, so you can patch away in bed without disturbing your sweet sleeping partner.
All the pots and minijacks are mounted on the PCB.
PCB - $15
Panel - $25
The 1st batch of these are reserved for the WAMOD workshop, a 2nd batch will ba available in late October.

Sloth Panels


Saturday, 13 September 2014

Sloth Chaos

This is a very simple to build chaos module that can be built in 2 ways: slow or VERY slow. Slow means 1 cycle every 15 seconds, VERY slow is 1 cycle every 15 minutes. It can take up to an hour for any change to be apparent when tweaking the pot. This module is ideal for ambience and extremely patient synth users. I developed it as I like to have my synths running whilst soldering away in the workshop and I like slow never-repeating changes to the patches.
The PCB is 16 x 95 mm, suitable for 6HP eurorack panels (panels will be available soon)
PCBs are available now (13/9/2014) for $8 each.
Shipping is $5 per order

The super slow version shown below has two 1000uF caps.

Friday, 12 September 2014

Hyperchaos Module

This vid shows testing of a hyperchaotic circuit. The circuit is comprised of two coupled Wien  Bridge oscillators. There is a temptation to call it 'Hyper Wieners', but I might just leave the 'ers' silent and call it Hyper-Wien.
Anyway, it oscillates at approx 0.5Hz, the PCB will have a vactrol to 'control' it but the effect from any CV signal takes 30 seconds to a minute to make the pattern change.