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Hi all...this great forum has been marvelously useful to me. So thank you all and thanks to OGR Magazine! 

I am working on an 18x17 foot island-style layout (O gauge, 3 rail using a mix of Gargraves and Ross). It's the Leaky Basement Railway. I want to have day and night scenes so I am trying to wire accordingly so that I can control the different scenery lighting as desired. I rigged the overhead track lights up to a big Variac so I can dim them easily and keep an evenly-lit layout at almost any light level.

My question is whether there is a good thread here somewhere on wiring things for day and night? If so, can someone supply the name of that thread?

The reason I ask the question is that as I wire the layout, I have multiple power buses and was wondering which should be on during DAY versus NIGHT? Here's where I am so far:

COMMON TO BOTH DAY AND NIGHT

Track power, Signals power and switch machine power

DAY SETTINGS

1. Variac Up, 2) public spaces lighting off, 3) Structure exterior lighting off,  4) Structure interior lighting ON?, 5) Miller billboards off

NIGHT SETTINGS

1) Variac at low setting (lights low), 2) Public spaces lighting ON, 3) Building exterior lighting ON, 4) Building interior lighting ON, 5) Miller billboards ON. 

How does that sound? What have I missed? Should structure INTERIOR lights be ON during the day? (I am thinking YES but maybe not). Any ideas appreciated.

All the best during the current mess.

Don  

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I've been thinking about day and night with 3 ganged variacs, clock wise, clockwise, and counter clockwise, day and nite are cw & ccw;dusk and twilight the third variac, with all variacs appropriately "tape insulated" for sequencing of day-dusk-nite-twilight-day. Nite would be the stars and moon with Aurora borealis ,perhaps. Still a concept and not yet a reality... but...

 

As you ask for any ideas

light sensitive relay

As I see it, the Variac is sunlight.  In the 1:1 world, light sensors are used to turn lighting on/off at dusk/dawn.  So how about a light-sensitive relay?  These are just a few bucks.  A relay turns on or off depending on the light level at the sensor - adjustable "trip" threshold.  Since the relay is of the SPDT type, it can turn some circuits ON at night (dark) and other circuits ON during day (light).

Otherwise, wire in an SPDT toggle switch to manually switch between day and night.

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Last edited by stan2004

The relay idea is a good one. But I'd still want the ability to over-ride it. So I'd still end up with a switch controlling a separate power bus for....just as an example...the billboards. So the relay could sense a lack of light and turn on the billboards. But if I wanted them to stay off, I could hit my over-ride switch.

The triple-ganged variacs and the aurora borealis is an amazing idea. It is well out of my scope--heck I am not sure I can get this layout running before I kick the bucket. But for someone modeling the Northern roads, imagine the reaction that would draw from visitors!

Don

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