ComputerVoltageSources

ummm... user interface... finally something i might be able to 
contribute to...  UI should really come last, but sometimes it helps 
to visualize what it might look like even while we're still 
brainstorming...

i think you're right, grant, the full feature set would take up a lot 
of panel real estate, in both frac and motm.  i'd suggest starting 
with a "kitchen sink" version implementing all options, but to 
eventually have some alternate versions scaled down for specific 
users...  
i'm not much of a midi guy, so i might want one without DIN; someone 
else might want to use the PCB to implement a dedicated quantizer or 
arpegiattor, they might sacrafice almost everthing, even the serial 
port...  

consequences of that plan might be: to limit one diminsion of the PCB 
to some lowest-common-denominator width (3" wide for frac, horizontal 
mount); and flying wires for jacks to accomidate the various 
layouts...

b


--- In ComputerVoltageSources@yahoogroups.com, "Grant Richter" 
<grichter@...> wrote:
>
> I guess we could add the option of a slew limiter for each ouput. 
If you want, populate the 
> board and wire you jacks to a differnt set of ouputs. That will add 
4 more pots and 
> possibly 4 more jacks if you want both.
> 
> At this point we are up to 12 knobs, 19 jacks, 6 LEDs, three 5 pin 
DIN connectors and a 
> DB9 connector.
> 
> With 1/4" connectors, that is like half a 19 "rack. Same with Frac-
Rac, a very big faceplate. 
> Then if you add a LCD display somewhere...
> 
> Any more stuff and the faceplate will be so expensive it will be 
too expensive for students 
> and beginning hobbiests.
> 
> For those who want to begin laying out faceplates, the faceplate 
component list is:
> 
> Jacks:
> 1 v/oct in 1-4
> Variable CV in 1-4
> CV out 1-4
> Run Pulse in
> Stop Pulse in
> Speech out jack
> Gate out jack
> Trig out jack
> Gate in jack
> Trig in jack = 19
> 
> Pushbuttons:
> 
> Run / Stop = 2
> 
> Knobs:
> 
> CV offset 1-4
> CV attenuator 1-4
> Ouput slew 1-4 = 12
> 
> 5 pin DIN:
> MIDI in
> MIDI out
> DIN in or out = 3
> 
> DB9 for programing interface
> 
> LEDs:
> 
> CV indicators 1-4
> Run / Stop LEDs = 6 total
> 
> Who is going to volunteer to do layouts in .fpd fromat?
> 
> One for MOTM and one for Frac-Rac. That will give us some idea of 
PC board dimensions 
> to work with.
> 
> I think we can use the Metalbox style 1900H knobs and Alpha pots 
for Frac-Rac.
> The jack spacing should accept either Switchcraft (Blacet) or 
16PJ135 (Wiard) jacks.
> The 16PJ135 jacks wire up very neatly because of the ground tangs 
being in-line.
> The knurled nuts are designed to be assembled with fingernails, so 
that is one less tool 
> you need.
> 
> --- In ComputerVoltageSources@yahoogroups.com, "Gary Chang" 
<gchang@> wrote:
> >
> > "drmabuce" <drmabuce@> wrote:
> > >
> > 
> > > in fact, one of the reaons i'm riding these threads so hard is 
that
> > > NOW is the time to brainstorm these issues , and get on with it
> > > so.... fire away!
> > > 
> > 
> > Well, then, I am constantly patching a SLEW to smooth the output 
of
> > the PSIM - I get a faint zippering when it is an LFO, controlling
> > JAG-VCAs for location...
> > 
> > gary
> >
>