Wire, wire, and more wire. Today I finished what I started on Tuesday, namely the detection panel for the big hidden yard. This is one of four panels made for enterTRAINment. The wires are coming from the various detection rails in the yard. Each of the black wires in the top row is connected to a single section of GarGraves on the yard lead. By counting the number of occupied sections, you can measure the train's length (to the nearest three feet).
Originally, every section of GarGraves in the entire yard was going to have its own detector. That is 200 detectors, and the train measuring was very important. However, after a runaway train incident a number of years ago, I decided to simplify and just go with 25 equal length "parking places". The next row and a half are those detectors. The bottom three rows aren't going to be used.
Next in line is the C/MRI panel. The final step will be to connect the inputs to the individual detectors. Beyond that is another detection panel. Note the bundle of wires hanging from the benchwork.
All 16 of the black wires and two sets of 5 colored wires came under the walkway through the PVC pipe. Fortunately, I had marked every one of them, but a number of them were too short to reach, so they had to be lengthened by splicing on.
Three of the five yard bundles came over to the panel from the other side of aisle two, through this pipe. There were also a bunch of other detection wires for the mainlines, that will need to be identified and connected to panel one.
On the other hand, simplicity is always my goal with electronics and wiring at home. 
