ComputerVoltageSources

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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