2010 Build Pictures

davebr · Joined: Jun 09, 2007 Posts: 198 Location: portland, or

I've completed a number of Jurgen Haible, Thomas Henry, and other modules in 2010.

Top Row (left to right)
Haible Polymoog Resonator, Haible Scanner/Chorus Vibrato, Haible Frequency Shifter, and Haible Varislope Filter/Phaser

The holes in the center of the knobs on the Scanner/Chorus Vibrato are for the LED indicators. I used clear shaft potentiometers with the LEDs behind the potentiometers. I needed clear center knobs so I drilled holes and glued in an eyelet.

Bottom Row (left to right)
Buchla Lopass Gate, Henry VCLFO, Wogglebug, Henry VCO, Haible Living VCO

Information on all my modules is on my site.
http://modularsynthesis.com/

Dave

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sduck · Posted: Fri Jul 23, 2010 8:28 pm Post subject:

Wow - great work! I'm especially fond of the frequency shifter design - it really breaks up the grid (in a good way)!

davebr · Joined: Jun 09, 2007 Posts: 198 Location: portland, or

sduck · Posted: Sat Jul 24, 2010 8:03 pm Post subject:

Yes. Maybe you remember - I liked it so much I copied it, with only small modifications to fit my panel design theme -
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macumbista · Posted: Wed Jul 28, 2010 12:09 pm Post subject:

More Neanderthal hand-hammered alu-plate panels hot off the bench. All electronics tested and working. Not at all pretty, but quite effective! Think I'm gonna freehand some analog computer circuits next...

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Dual Serge 1973 Voltage Controlled Filter (CGS)
Dual Active Real Ring Modulator (CGS)
Quad Joystick Controller (Macumbista)
Quad Resonant Lopass Gate 292 (Buchla/T. White)

The 1973 VCF is quite sweet, I can really recommend it! I'm not satisfied with the RRM yet, I'm still working out some signal nulling issues. The joysticks--well they're joysticks...bipolar, no offset or scaling controls, buffered outputs, what more can you say?

The Lopass Gates surprised me simply because they just plain worked when I plugged them in. I was sure with four PCBs packed behind the panel and an assload of wiggly wiring, something had to go wrong. And somehow it didn't! They sound pretty good, but I haven't played around sending narrow pulses to them yet--need to build a comparator circuit for that first. Also haven't added the mixer board for the combined output yet, shhh don't tell anybody...

RF · Posted: Wed Jul 28, 2010 8:54 pm Post subject:

macumbista · Posted: Thu Jul 29, 2010 2:45 am Post subject:

fonik · Posted: Thu Jul 29, 2010 2:54 am Post subject:

macumbista · Posted: Thu Jul 29, 2010 3:07 am Post subject:

emdot_ambient · Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD

kkissinger

macumbista · Posted: Fri Jul 30, 2010 7:21 am Post subject:

I don't know why I never built something like this sooner:

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Fully documented here.

nerdware · Joined: Jul 11, 2009 Posts: 91 Location: UK

kkissinger

I finished the CGS Voltage-Controlled Clock Divider in time to demonstrate (and perform) with it last week at the Kansas City Regional electro-music festival.

Today I finished the CGS Bi-N-Tic filter.

The Clock Divider worked on the first power-up. All I had to do was calibrate it.

The Bi-N-Tic was a little more challenging. The smoke test almost turned into a "real" smoke test... indeed, the SM311 chip heated up. Turns out that I had the FET in backwards. Turned it around and the module came to life. (It took me many hours to find it.)

I also tamed some of the voltages that feed the course frequency control (the design gives it a thirty volt range! I got it down to a more manageable 10 volt swing. Smile

How does it sound? Well once my studio is set up (I still haven't gotten everything back into place since the Kansas City EM festival) I'll post a demo track.

It is kind of a filter and oscillator combination that does amazing syncing effects and sometimes strange sweeps that sound more like a sample/hold. I really like the module and look forward to using it.

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The front panel of the CGS Voltage-Controlled Clock Divider. It is in a Aries 9"x3" module format.

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View that shows the PCB of the VC Clock Divider.

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P7310039.JPG

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The front panel of the CGS Bi-N-Tic filter.

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The PCB of the Bi-N-Tic filter -- look at all the capacitors!

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RF · Posted: Sun Aug 01, 2010 7:02 pm Post subject:

Congrats Kevin!
The Bi-N-Tic is the _one_ module that sits forlorned on my shelf of shame. I have spent so much time on it it makes my head spin...and still no joy.

Maybe one of these days I'll get the motivation to go back to it....

bruce

kkissinger · Posted: Sun Aug 01, 2010 8:31 pm Post subject: Bi-N-Tic troubleshooting

TekniK · Joined: Aug 10, 2008 Posts: 1059

nice wiring,i like the use of those flat cables

AnalogCustom · Joined: Jun 23, 2009 Posts: 52 Location: Chile

nerdware · Joined: Jul 11, 2009 Posts: 91 Location: UK

macumbista · Posted: Tue Aug 03, 2010 5:58 pm Post subject:

This module allows “Buchlidian” style processing of three input voltages. It can do much of what the original Buchla 257 Voltage Processor does: addition, subtraction, multiplication and division. The only feature of the 257 it lacks is the ability to “transfer control” (i.e. interpolate) between the two different applied voltages.

It contains one section with three "attenuverting"/bipolar inputs. The other section contains an analog multiplier. The panel contains two of each section. The X and Y inputs can be switched between AC and DC coupling, while the Z input is always DC coupled.

Full documentation including schematic here.

kkissinger

Those who attended the Kansas City electro-music festival may recognize this panel -- indeed, this is the panel that I used to demo the DecalPro process (though I had to redo the label -- I didn't spray enough glue on the decal and it didn't completely stick to the panel).

It is actually quite a simple device -- six square wave oscillators all mixed together. Each oscillator has its own frequency control, and a switch for off, audio frequency, and low frequency. Oscillators 1 and 2 can be converted to triangle waves.

All the oscillators are fed to an op-amp mixer which, in turn, is passed through a lag (glide) circuit that has a variable control and a switch.

It works very well in conjunction with my (seperate) voltage-quantizer module to create random melodies. In the audio range, it can produce drones -- however it is very powerful when used as an FM source for another VCO. After all -- with six different oscillators, some very complex sounds are possible -- ranging from noise/static sounds to very rich drones.

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The front panel of the Super Psycho Modulation Source.

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View of the circuit board. This module, for its size, has a lot of wiring. The front panel has a total of 27 Pots, LEDs, switches, and jacks -- as dense a layout as the Klee Sequencer! I leave sufficient slack in the wiring that I can easily troublesho

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kkissinger

kkissinger · Posted: Thu Aug 05, 2010 9:56 am Post subject:

@sduck and macumbista --

I really like those colorful panels.

Since I'm currently expanding my Aries synth, I have stuck with their simple color scheme.

On my wish-list is an integrated theremin/synthesizer and it will have pretty colors for the labeling.

macumbista · Posted: Thu Aug 05, 2010 11:16 am Post subject:

TekniK · Joined: Aug 10, 2008 Posts: 1059