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
>
