Yeah - Will's a trip. These days he's filling blank books with poetry. When he gets out of school in a few weeks, we'll launch into building our four-section case and mounting our modules into it (at long last).
OK - so - let's all remember that the 7U version involves the three waveshapers - that means 3 MFOS VCO PCBs in addition to the Living VCOs PCB. This hasn't been tested yet, of course, but we see no reason it wouldn't work. Ray Wilson feels it will.
We corresponded with him and he confirmed that by feeding the Living VCO "core" output into the MFOS VCO PCB at R12, we'd use just the wave-shaper section and viola! It's unclear what the value of R12 should be - we don't know enough engineering to calculate it.
Jurgen says the LVCO "core" output is 0...+10V; the input of the MFOS VCO waveshaper is designed for 1.5V. Ray suggests we'd "need to adjust the value of R12 up to perhaps 82K or 91K since the RAW output on the MFOS VCO is way lower than 10V (it is more in the range of 1 to 1.5V.)" R5 may also need adjusting.
But Will and I totally plan to build this. It seems really pricey until you divide the cost into three VCOs plus the "Controller" thing plus the waveshapers. It's four modules in one - plus waveshaping. Pretty cool.
OK - so I'd forgotten I'd already posted all 3 designs to our Main Page -
http://www.dragonflyalley.com/billAndWillMOTMSynth.htm - scroll down on the page 'till you get to the JH Living VCOs Designs ( a little more than halfway down.)
The 5U is a really straightforward implementation of Jurgen's circuit control design. It looks quirky because of the switches that tie the PW & PWM controls together. But it really does make sense.
The 7U looks a little quirky because of the way the Verniers are skewed to the right of the other controls. But I think it kinda looks cool that way. And it makes it possible to use completely MOTM-compatible Knobs for all the controls, and has room for the Wave-shaped outputs at the bottom, and has very intuitive layout for the "Controller" thing.
In all these designs, we wanted to make the VCOs operate as independently as possible. I'll review the Schematics later tonight and remind myself just how independent this is.
OK - enough for now.
Bill
--- In ModularSynthPanels@yahoogroups.com, "adaaxs" <wonggster@...> wrote:
>
> That kid of yours is something else. Actually a 7u panel is sensible if it is the main vco in the cabinet it is going into. When working on a synthi the VCO is what you tend to obsess on. Small vco knobs don't hunt. I guess I am down for a 7 and a 5.
>
> If it is a short run perhaps Scott could use Metalphoto , MF makes stick on panels that that are really thin metal and very cheap after art costs, (relatively you send them a punched panel and they can print and stick on an overlay that will be punched and match or they can do a regular panel. They use all art types prbly not .fpd.
> >
> > Hi Guys - On our site, we show a 4U version with some tiny (1/2") knobs. We're almost certain everything will fit behind the panel but we're going to do a very careful experiment to make sure. Before Scott makes any panels, we'll buy some of the 1/2" knobs and lay them out and photo it all so everyone can see exactly what it will look like, OK?
> >
> > At Scott's suggestion, Will developed an alternative 5U version. It's exactly the same layout, except it has a slightly larger (and less expensive) vernier (counting) dial and it uses the "Tellun" Standard .67in dia knobs that match MOTM standard except are smaller.
> >
> > In both these layouts, Will kept as many as possible of the control elements on the standard MOTM grid - especially the horizontal - and they both look real good (to my eye).
> >
> > In our case, if either the four or five U version is made, we intend to build a 1U sister module with three wave-shapers to supply SIN, SAW, TRI, and SQR outputs for each VCO.
> >
> > We've already done the research on this - it looks like it can be accomplished by using three MFOS VCO PCBs and feeding the "core" output of each Living VCO into the Wave-Shaper section of the MFOS circuit at R12. (please review)
> >
> > So at my request, Will also developed yet another panel layout that includes the wave-shaper outputs in the same panel as the Living VCO. It's 7U, (one unit larger than the 5U plus the 1U daughter-board), uses all MOTM standard knobs (except the larger counting dials), and has the SIN, SAW, TRI, SQR outs at the bottom (a-la the MOTM-300) as well as the standard Living VCO outputs.
> >
> > At the moment, I haven't got time to give the 5U and 7U versions a final review and post them, but I promise I will when I have time later on tonight.
> >
> > As for me, I'm leaning toward Will's 7U version. I know it sounds crazy - and most people will want the 4U or 5U versions. So I'll probably ask Scott to do a one-off for us (although I have heard interest in the 7U from at least one other builder).
> >
> > Still the 4U or 5U is going to suit most people just fine.
> >
> > Again, I'll post them later one way or another.
> >
> > Thx.
> >
> > Bill (and Will)
> >
> >
> >
> >
> > --- In ModularSynthPanels@yahoogroups.com, Scott Deyo <contact@> wrote:
> > >
> > > The 'ills have some designs they've been working on:
> > > http://dragonflyalley.com/constructionJHLivingVCO.htm
> > >
> > > Scott Deyo
> > > The Bridechamber
> > > contact@
> > > http://www.bridechamber.com
> > > Jealous Edison Record Kompany
> > > http://www.jealousedison.com
> > >
> > >
> > > On May 25, 2009, at 11:48 AM, adaaxs wrote:
> > >
> > > >
> > > >
> > > >
> > > > I know this is down the road (wish it wasn't) but are there any ideas
> > > > for JH living vco panels ? is it going to be one w controller and add
> > > > ons or full three w controller like on a Moog ? I have been dropping
> > > > threes of every type I have ever done except lfos.
> > > > For me it lvco is an easy build, couldn't resist starting on one. I
> > > > found that the smaller smd bypass caps (1205 ?) are easier to attach
> > > > to the pcb, much neater and I don't melt them.
> > > >
> > > >
> > >
> >
>