I will use 2 pole (two leads in (+ & -)), 6 position (only using four) rotary switches. I can turn the rotary switch to one of four signal indications for each signal. I'm using custom built dual head searchlight signals. The aspects that I can set are:
Clear - green over red
Approach - yellow over red
Stop - red over red
Approach Diverging - red over yellow
Here are pics of the wired board and rotary switch.
It's expensive to buy the logic boards to control the signals. My layout is small so I chose using a simpler control method.
- Merry Christmas everyone!