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
> >
>