Modular Synth Panels

-Got it, very clear. This should be pasted into the schemo page. It's stuff like this that
leaves projects half finished.

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> Your switch will use four of those points on the pcb:
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> +V
> ground
> a0
> a1
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> 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:

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> 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

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> A 3LP
> B 2LP/1HP
> C 1LP/2HP
> D 3HP
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> ...then
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> 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)
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> Here's how I made my connections:
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> a0 -> pole1
> a1 -> pole2
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> strapped:
> ground -> 1, 3, 7, 8
> +V -> 2, 4, 9, 10
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> After strapping the points on the switch, I just ran one wire for +V and one wire for

ground back to the PCB.

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> *REMEMBER the preceeding example was for my switch. If you have a five-position

switch these will be different...probably something like:

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> A :: pole 1 > 1 :: pole 2 > 6
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> B :: pole 1 > 2 :: pole 2 > 7
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> C :: pole 1 > 3 :: pole 2 > 8
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> D :: pole 1 > 4 :: pole 2 > 9
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> Use your continuity checker on your DMM to make sure your results match these before

you proceed. If this is correct, then...

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> a0 -> pole1
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> a1 -> pole2
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> strapped:
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> ground -> 1, 3, 6, 7
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> +V -> 2, 4, 8, 9
> (position 5 is unused, so lugs 5 and 10 will be left alone.)
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> Does this make sense?
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> --- 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
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> Your explanation is over my head. I only see 6 connection points left on my

pcb: 2

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> ground, a0, a1, V+, V-. and another ground at the other end. I have a 2pole 5 position
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> switch.
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> > you have to extract the switch wiring from the schematic. you will be switching

between

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> four combinations of +V and ground (two bit binary combinations) . at a0, positions 1

and

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> 3 are connected to ground, and positions 2 and 4 are +V. at a1, positions 1 and 2 are
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> connected to ground and positions 3 and 4 are connected to +V. i strapped the ground
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> and +V connections to each other on the switch, ending up with only one +V and one
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> ground wire from the switch to the PCB.
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> >
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> > i did order a component kit from scott and im glad i did--it made the build go
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> smoothly.
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> > --- On Wed, 8/6/08, adaaxs <wonggster@ ..> wrote:
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> > From: adaaxs <wonggster@ ..>
>
> > Subject: [ModularSynthPanels ] Threeler
>
> > To: ModularSynthPanels@ yahoogroups. com
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> > Date: Wednesday, August 6, 2008, 8:58 AM
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> > I think I am feeling a bit dumb today. Or I am excited to get this up.
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> > I am wrestling with this threeler and have some basic questions. The first thing is

that I

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> > realise that I have no understanding of how to spec out or buy a rotary switch. If
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> anyone
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> > knows of a simple way of expressing what to get I would be pleased. I see a 2 pole 4
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> position
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> > switch but nearly every 4 position switch I see is 3 poles. I don't get it and I am stuck

for

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> a
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> > I also can't see 2 of the the wiring points for the switch unless it is A0, A1, V-, V+.
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> > Is there a BOM for this puppy ?
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> > Also is it cool to sub a 150pf for the 180 pf ?
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> > Same question for 47pf or 68pf forthe 56pf?
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> > best
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> > g
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