[sdiy] pre/post switch

[mark verbos]

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
>>>
>
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