-Got it, very clear. This should be pasted into the schemo page. It's stuff like this that
leaves projects half finished.
>
> Your switch will use four of those points on the pcb:
>
> +V
> ground
> a0
> a1
>
> Hm, a 2-pole 5-position...so you should have two poles and ten positions total (five for
each pole). If so, you will only be using 8 of those positions (four for each pole). Match
up each pole with the first four switching points for that pole. For example:
>
> i used a 2-pole 6-position switch (2 poles in the center and 12 positions on the
outside). The positions were labeled 1-12. I used positions 1, 2, 3, 4 for pole 1 and
positions 7, 8, 9, 10 for pole 2. So, when my switch was in the following positions A/B/
C/D, where
>
> A 3LP
> B 2LP/1HP
> C 1LP/2HP
> D 3HP
>
> ...then
>
> A :: pole 1 > 1 :: pole 2 > 7
> B :: pole 1 > 2 :: pole 2 > 8
> C :: pole 1 > 3 :: pole 2 > 9
> D :: pole 1 > 4 :: pole 2 > 10
> (positions 5, 6 are unused, so lugs 5, 6, 11, 12 left alone)
>
> Here's how I made my connections:
>
> a0 -> pole1
> a1 -> pole2
>
> strapped:
> ground -> 1, 3, 7, 8
> +V -> 2, 4, 9, 10
>
> After strapping the points on the switch, I just ran one wire for +V and one wire for
ground back to the PCB.
>
>
>
> ∗REMEMBER the preceeding example was for my switch. If you have a five-position
switch these will be different...probably something like:
>
> A :: pole 1 > 1 :: pole 2 > 6
>
> B :: pole 1 > 2 :: pole 2 > 7
>
> C :: pole 1 > 3 :: pole 2 > 8
>
> D :: pole 1 > 4 :: pole 2 > 9
>
> Use your continuity checker on your DMM to make sure your results match these before
you proceed. If this is correct, then...
>
> a0 -> pole1
>
> a1 -> pole2
>
>
>
> strapped:
>
> ground -> 1, 3, 6, 7
>
> +V -> 2, 4, 8, 9
> (position 5 is unused, so lugs 5 and 10 will be left alone.)
>
> Does this make sense?
>
>
>
>
>
>
>
>
> --- On Thu, 8/7/08, adaaxs <wonggster@...> wrote:
> From: adaaxs <wonggster@...>
> Subject: [ModularSynthPanels] Re: Threeler
> To: ModularSynthPanels@yahoogroups.com
> Date: Thursday, August 7, 2008, 8:16 AM
>
>
>
>
>
>
>
>
>
>
>
> Your explanation is over my head. I only see 6 connection points left on my
pcb: 2
>
> ground, a0, a1, V+, V-. and another ground at the other end. I have a 2pole 5 position
>
> switch.
>
>
>
> >
>
> > you have to extract the switch wiring from the schematic. you will be switching
between
>
> four combinations of +V and ground (two bit binary combinations) . at a0, positions 1
and
>
> 3 are connected to ground, and positions 2 and 4 are +V. at a1, positions 1 and 2 are
>
> connected to ground and positions 3 and 4 are connected to +V. i strapped the ground
>
> and +V connections to each other on the switch, ending up with only one +V and one
>
> ground wire from the switch to the PCB.
>
> >
>
> > i did order a component kit from scott and im glad i did--it made the build go
>
> smoothly.
>
> >
>
> >
>
> >
>
> > --- On Wed, 8/6/08, adaaxs <wonggster@ ..> wrote:
>
> > From: adaaxs <wonggster@ ..>
>
> > Subject: [ModularSynthPanels ] Threeler
>
> > To: ModularSynthPanels@ yahoogroups. com
>
> > Date: Wednesday, August 6, 2008, 8:58 AM
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> > I think I am feeling a bit dumb today. Or I am excited to get this up.
>
> >
>
> > I am wrestling with this threeler and have some basic questions. The first thing is
that I
>
> >
>
> > realise that I have no understanding of how to spec out or buy a rotary switch. If
>
> anyone
>
> >
>
> > knows of a simple way of expressing what to get I would be pleased. I see a 2 pole 4
>
> position
>
> >
>
> > switch but nearly every 4 position switch I see is 3 poles. I don't get it and I am stuck
for
>
> a
>
> >
>
> > switch.
>
> >
>
> >
>
> >
>
> > I also can't see 2 of the the wiring points for the switch unless it is A0, A1, V-, V+.
>
> >
>
> >
>
> >
>
> > Is there a BOM for this puppy ?
>
> >
>
> >
>
> >
>
> > Also is it cool to sub a 150pf for the 180 pf ?
>
> >
>
> > Same question for 47pf or 68pf forthe 56pf?
>
> >
>
> >
>
> >
>
> > best
>
> >
>
> >
>
> >
>
> > g
>
> >
>