and the train is complicated so for now I've just modeled it with a resistor so that the the current is a few amps. One of the cool things about the AC712 sensor is it has a DC bias on the output, so even though the transimpedance...
Really nice modeling: Gas stations are popular on layouts..quite a few kits in HO.. to upscale plans from... and I have scratchbuilt/kitbashed several (probably too many to use on layout), using BV details. That Victorian station is really impressive...all will want to see that finishe...
The heavy wire gauge power bus allows the 7A power supply to be swapped out for a higher amperage unit if needed in the future. To help visualize the arrangement, here is a map of the upper deck power districts showing the end points of each district and the location of circuit ...