ComputerVoltageSources

All of my Blacet modules have panel-mounted pots and they work fine...?

--- In ComputerVoltageSources@yahoogroups.com, David Kronemyer
<dkronemyer@...> wrote:

>
> If I could just chime in here, it¹s crazy to mount anything to the PCB
> except for wires. A few good twists (as in knobs) or push-pulls (as in
> plugs) and they¹re history. For lack of a better expression, they

³torque

> out² (an old surfing term). This is why e.g. Whirlwind stage boxes

(with

> which I have too much familiarity) tend to fall apart quickly ­ all the
> connectors are PCB mounted. DAVID
>
>
> On 3/10/06 1:49 PM, "Grant Richter" <grichter@...> wrote:
>
> > First, no offense to Chris for an excellent question.
> >
> > Don't talk to me about "no screw holes in the faceplate" that is

why you don't

> > see Wiard
> > modules in MOTM format. That idea is insulting to any designer.
> >
> > Spend your time thinking about MUSIC, forget the g*dd*mn

screwholes, get some

> > therapy
> > for your out of control OCD behavior, how many times do you wash

your hands a

> > day?????????????????? (loud hissing of steam escaping from ears).
> >
> > I apologize for the rant, silly limitations really annoy me.
> >
> > There is no advantage to ANY panel mounted components being in

hard copper on

> > the PC
> > board.
> >
> > What if someone wants to use it for controlling dimmer packs for a

hobby

> > theater?
> > Then the board would be bench top mounted horizontally and the

pots would be

> > slide
> > pots. It could support both 0-10 volt packs and the MIDI

controlled ones.

> >
> > What about using it to control servo laser scanners for a laserium

light show?

> > (those are
> > voltage outputs to current drivers)
> >
> > What if all the pots are force sensing resistors built into a

dancers suit?

> >
> > What about if it is used for squib control to light the "Burning

Man" on fire

> > when
> > Interstellar Overdrive reaches the climax?
> >
> > OK, those are meant to be humorous examples, but also practical

applications.

> >
> > I don't see an anvantage favoring any mounting position or

potentiometer type,

> > spacing or
> > placement. I would just use the Wiard pigtail pot assembly method.

That is

> > each pot,
> > switch or whatever has a dedicated 0.100 KK connector. You can

always solder

> > directly to
> > the PC pads and skip the connectors.
> >
> > I would use the extra space for as much perf board area as

possible for

> > hanging more
> > experimenters chips, sensors, high current servo drivers etc.
> >
> > We will have holes in the right spots for that MOTM metal bracket

thingy. Can

> > sombody
> > tell me what that spacing and hole size is?
> >
> > A 4 x 6 board will fit in a Frac-Rac. Is 6-7 inches too deep for

MOTM and

> > Doepfer racks?
> >
> >
> >
> >
> > --- In ComputerVoltageSources@yahoogroups.com, xamboldt

<xamboldt@> wrote:

> >> >
> >> > Or... if pots aren't PCB-mounted, what panel components should be?
> >> > MIDI Jacks? DIN? LEDs? We've already heard that DIN might not be
> >> > something everyone would want...
> >> >
> >> > Would there be room for 4 pots and MIDI I/O?
> >> >
> >> > -Chris
> >> >
> >> > On Mar 10, 2006, at 3:10 PM, xamboldt wrote:
> >> >
> >>> > > Can of worms warning!
> >>> > >
> >>> > > Should the PCB be laid out so as to allow PCB-mounted pots for
> >>> > > perhaps 4 or 6 of the controls? Different front panel

formats could

> >>> > > be allowed for by simply doing point-to-point wiring instead

of PCB

> >>> > > mounting the pots. The difficulty comes in deciding which format
> >>> > > would be used to dictate the spacing of holes for the

PCB-mounted

> >>> > > pots. Both Blacet and MOTM have standards we could

appropriate for

> >>> > > PCB-mounted pots. The CVS' pots (as spelled out by Grant)

are grouped

> >>> > > in functional units of 4, and that is the typical max vertical
> >>> > > allowance of pots on an MOTM panel. Blacet has up to 6

maximum, but

> >>> > > plenty of designs have fewer pots.
> >>> > >
> >>> > > I guess someone had to bring it up.... :)
> >>> > >
> >>> > > -Chris
> >>> > >
> >>> > >
> >>>> > > >
> >>>> > > > 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.
> >>> > >
> >> >
> >
> >
> >
> >
> >
> >
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