ComputerVoltageSources

A 4" x 6" PCB should come in at way under $50 unless its necessary
to use a four-layer board.

It would be best to avoid that from a hobbyist standpoint, they are hard
to hack and modify... and if you have to unsolder anything, the PTH
holes
can be damaged easily.

I'm planning on beefy pads and about a 15 mil trace, minimum.  I do
boards
like someone will repair them in the future. No 'throw-away' for me :^P

Instead of the 'magic eye' tubes on the front panel... we should put
phase controlled AC outputs of 120V or 240V so that you can do a whole
light show.

(if you are extra-nice... I'll put isolation on them so the whole synth
chassis is not at line potential :^)

y'don't think the dv/dt will cause any noise issues ??? Probably no
harder to
deal with than the heat from the tubes  :^P

H^) harry

Grant Richter wrote:
> 
> The Blacet mechanical scheme will work for the most mechanical formats
> (PC board 90
> degrees from panel).
> 
> You can always mount the board parallel to the faceplate in a desktop
> design using longer
> standoffs to the faceplate.
> 
> All packaging will be by the end user. I only see a PC board coming
> out of this. Hopefully a
> group buy will make them available to the public for under $50. With
> publicly published
> parts sources. You supply the solder.
> 
> If people do layouts for Schaefer panels, it will be nice if they
> share them with the group.
> 
> I'm still thinking "high school science fair project" (maybe with
> Dad's help?). It is a general
> purpose processor board with voltage I/O, you could use it to control
> Christmas tree lights
> around the house. We are just adding the tweaks so it fits perfectly
> with analog modulars.
> 
> The fact that  it will be very fun for ALL modular guys is a bonus.
> 
> For a didactic object, the more immediate the reward, the better the
> learning potential.
> What better "reward" for learning than to hear music you caused with
> your own
> programming? And the worst punishment for failure is the music sounds
> strange, nothing
> students would need therapy for.
> 
> I wish there was still an "all in one" synth chip so we could put a
> synth voice right on the
> PC board. The Speakjet is an OK substitute (pitches are not very
> accurate).
> 
> --- In ComputerVoltageSources@yahoogroups.com, "Gary Chang"
> <gchang@...> wrote:
> >
> > "Grant Richter" <grichter@> wrote:
> > >
> > > I think we just plan to rotate the board.
> > >
> > > For Frac-Rac, the 4 inch is the vertcal dimension, for MOTM, the
> six
> > inch is the vertical
> > > dimension. This why no board mounted pots or jacks.
> > >
> >
> > Grant,
> >
> > Regarding the pcb design and application, are you planning for a
> > perpendicularly oriented pc (ala Blacet), or a parallel oriented
> pcb,
> > (ala Wiard)?
> >
> > gary
> >
> 
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