Timbre generator

PCBs - US$18
panels - US$20
assembled - US$160

This is basically a clone of the Buchla timbre found in the Easel. I have added a simple tri2sine converter input, along with the regular input, and buffered output. The panel looks dark blue when mounted in a case.

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.

 

Nov 2017 update - The current panel is white/gold. there is also a smd dual Timbre available.

4seq

8HP Eurorack Sequencer for June WAMod workshop, four stages but with fwd/reverse control so you can get some pretty complex sequences happening when feeding it 2 diffrent clock signals. Two CV outs giving the opposite count of each other, so if one is giving 1234123..., the other is going 4321432...
Also there is a clock divider giving /2, /4, /8 & /16 of the count (which of course gets really interesting when the fwd/reverse control is in action)

Sloth modules for sale

These are built by ME, available in regular or super version
US$85 each

shipping by registered airmail is US$15 per order outside of Australia
US$5 per order within Aust. (as in - buy one or ten, shipping is the same)

This is a true chaotic CV generator (as in real chaos, not using the name as a buzzword). the regular version produces signals at approx 16 seconds per cycle, the super version takes 16 minutes per cycle. If you like slowly changing, never repeating ambience, these are for you.
The panels are 2mm blue with Gold finished metal lettering suitable for Eurorack systems

ADSR312 - envelope generator

This was also developed for the WAMod synth building workshops, but some PCBs and panels are available
PCB - US$18
panel - US$20
shipping - US$5 per order

This circuit is based on the Aries 312 envelope generator. It is a very capable, easy to use and  discrete (no CMOS or op amps) ADSR with a re-trigger function for more complex envelopes.

Collude - envelope follower & amp

This was developed for the WAMod synth building workshops, but some PCBs and panels are available
PCB - US$18
panel - US$20
shipping - US$5 per order

A fairly straightforward envelope follower and an amp circuit giving up to 20X signal gain. It means you can connect a guitar or microphone to your synth and generate a gate, an envelope and the audio signal at standard synth voltage levels.
The envelope circuit has a 'response' pot which actually greatly increases the gain on the envelope and is useful for very low level signals, there is a trade-off of some distortion on the envelope at high gain settings.

42Hp CV Controlled Matrix Mixer

This one has 8 inputs and 4 outputs, under the hood are 32 VCAs and 4 mixers. Bit of a challenging build!

PCB - US$40
panel - US$50
assembled - US$440

please note - panels are now white/gold

dual LFO with difference rectifier

This was developed for the local WAMOD synth workshops, a few spares are available.
PCB - US$18
panel - US$20
shipping $5 per order
Two wide ranging LFOs; from approx 830 Hz down to 0.02Hz (1 cycle every 50 seconds), giving tri and square waveforms. There is also a difference rectifier onboard which gives signal corresponding to the positive and negative aspects of the difference between the two tri waves.
All thru holes components, no wiring to do.