Of course, if it wasn't for what goes on below base board level, nothing on the top would work!
Electronics and electrics strike fear in to a lot of people who are probably very proficient modellers.
To me it's the other way round as a retired Electrical Technician I have a good background for wiring model railways! Whereas my modelling skills will never make the likes of MRJ!
What makes this layout different to all my previous efforts is the track work. "Steam on the Cambrian" uses C&L Finescale flexible track and hand built points. I didn't want to use solenoid type point switch machines because of the sudden and powerful action is not good for hand made points. To this end I decided to use Fulgarex slow action switch machines. Designed to work on 12V DC they still run a bit fast, so I built a voltage regulator circuit with a variable output voltage. The Fulgarex units being quite happy and run at a reasonable speed when set at 9 volts.
Here's a picture of the underneath of Penmaenpool's baseboard showing the various voltage power supplies and wiring during construction.
Power for all this lot and the traction current comes from a mains power pack.
Finally control panels.
The main control panel is mounted on the front of the Penmaenpool board allowing layout operation from the front.
The whole ensemble being controlled by two good old fashioned and reliable DC home made hand held control units.
I do not recommend any unskilled person building their own power supplies or anything else that connects to the mains.
Please do not ask me for details on wiring up transformers because if you don't know that information then it's obvious you don't know enough to work on mains energised equipment.