Tuesday, 17 March 2015

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.




Friday, 13 March 2015

30Hp CV Controlled Matrix Mixer

This one has 8 inputs and 4 outputs, under the hood are 32 VCAs and 4 mixers. The proto-type worked well, just needed 2 links added and a few resistor values tweaked to get unity gain for a 5V CV. Using a solder-paste stencil and reflow oven, it takes about an hour to get all the surface mount components attached....by hand I dunno, not keen to find out either :)

PCB - US$40
panel - US$50






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.









Wednesday, 18 February 2015

multi-band distortion processor

This is the 1st prototype of this module, though it only needs a few tweaks to get the gains of each channel more equal and some minor changes to the panel.

Basically it splits the input signals into 4 frequency bands, these go into fuzz circuits and vactrol based VCAs, then summed to the output or use the individual channel outputs. You can blend the clean/distorted signal and vary the fuzz characteristics.








Friday, 13 February 2015