The railway power supply arrangements have been revised. As more electrical bits were added to the railway, the original solution was running out of ‘steam’.
The gold coloured box at the top is the main power supply for the layout. This will deliver up to 10A at 16v.
The silver unit on the left steps up the 16V to 24V to supply the point drivers; this has improved the point reliability now that the track has been ballasted.