I'm looking for an 8 way DIP switch, that allows me to select between two different source voltage inputs. The most convenient would be a DIP switch with 10 pins: 2 inputs (e.g. +5 and +3.3) and 8 outputs. But of course an 8 way SPDT switch would do (24 pins), as I could just solder all the +5 and +3.3 input pins together.
At first I thought this would be the most common use of a DIP switch but I cannot seem to find such a switch.
Let me explain what I'm trying to do. I am making a breakout PC board for an Arduino Mega, which will have 8x RJ45 sockets (more accurately called 8P8C).
Each 8P8C socket will have 6 of the CAT6 cable cores reserved for breaking out IO pins, and the remaining two to power external devices.
I would like to be able to select the voltage supplied to external devices, individually for each connector. So I could choose that each CAT6 cable carries either 5V or 3.3V. But to reduce my board size I don't want 8 separate SPDT switches. Instead I'd like an 8-way DIP switch.
However upon looking, it seems DIP switches are almost exclusively SPST type. A quick google for "SPDT DIP" brings up a page on Mouser, however I cannot see any such switches.
This surprises me, as I would have thought the most common use for a DIP switch would be a "selector" switch of some kind.
Do these things exist, or have I misunderstood what I'm looking at?