[sdiy] pre/post switch

[Scott Gravenhorst]

Ah.

Yes, I think so.  There are too many paths to use a DPDT.

One could use some CD4066 gates and an SPDT switch.

There aren't any relays...  (c:

mark verbos <a0284520 at addcom.de> wrote:
>I don't think that's what he wanted. I  imagine Marus was looking for this.
>
>a = input
>b = in of first module
>c = out of first modules
>d = in of second module
>e = out of second module
>f = output
>
>then you need a TPDT switch wired like this
>
>b-a-d
>d-c-f
>f-e-c
>
>
>when it is in the "left mode" you will have input-first module-second 
>module-output
>when it is in the "right mode" upi will have input-second mdule-first 
>module-output
>
>
>am I right?
>
>mark
>
>
>
>Scott Gravenhorst wrote:
>
>>Like this: 
>>
>>
>>                 +----------------  out 1
>>                 |
>> A ----------*   *   *
>>              \     /
>>               \   /
>>                \ /
>>                 X   <--- no connection at X
>>                / \
>>               /   \
>>              /     \
>> B ----------*   *   *
>>                 |
>>                 +----------------  out 2
>>
>>
>>
>>
>>
>>"Scott Evans, Gen Mgr" <esresource at earthlink.net> wrote:
>>
>>>If your question is to route two signals to two destinations it would be
>>>as follows:
>>>
>>>The each signal would be routed to the center poles of the switch. The
>>>destinations would be routed to one side of the switch. The other side
>>>of the DPDT would cross connect (like an X) to the destination sides so
>>>that flipping the switch would alternate to the other destinations.
>>>
>>>I tried drawing this in ASCII with no success. Perhaps some talented
>>>artist can do a gif.
>>>
>>>Scott
>>>
>>>markus wrote:
>>>
>>>>how would you wire up a simple, common (DPDT?) switch that routed a signal
>>>>from A to B, or B to A depending on the position of the switch ? no fair
>>>>using relays!
>>>>mark
>>>>
>>
>>=========================================================  
>>- Government: The other religion.
>>- The media's credibility should always be questioned.
>>- Lambs who lie down with lions are lunch.
>>
>>-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
>>-- Linux Rex         | RedWebMail by RedStarWare
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>>
>>
>>
>
>
>

=========================================================  
- Government: The other religion.
- The media's credibility should always be questioned.
- Lambs who lie down with lions are lunch.

-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
-- Linux Rex         | RedWebMail by RedStarWare
-- FatMan: home1.GTE.NET/res0658s/FatMan/index.html
-- NonFatMan: home1.GTE.NET/res0658s/electronics/index.html