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Modular Synth Panels

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Message

Re: Threeler

2008-08-07 by adaaxs

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
> 
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>     
>             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 
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> switch.  
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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 ?
> 
> Same question  for 47pf or 68pf forthe 56pf? 
> 
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> best
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> 
> 
> g
>

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