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Hi there folks - my name is Jeff and am relatively new to model RR'ing.  But, I'm jumping into the hobby with my 5 year old.  We've got a Thomas and a PE lionking (fastrack) set that we're planning to run on a figure-8 layout with a siding.  Benchwork is done - 4X8.  I love the lionchief set up for my son b/c the remotes give it more of a 'fun' feel forhim.  That said, the simplicity also reduces my flexibility I think.

 

As we build the layout, I'm wanting to install some accessories and some lighting.  I'm pretty comfortable with volts/amps/watts, etc and ensuring I'm not going to cause any safety issues, etc.  However, I do have two fundamental questions that I'm frankly embarrassed that I have to ask:

 

1)  I bought 3 MTH O-Gauge Lamp Posts that do not have power requirements listed.  I assume roughly 12v and maybe .1amp.  However, can these be run off DC or should an AC power source be used.  I have an old laptop power supply (AC to DC converter) that is rated for 12v and 5amp.  Can I cut the end off, wire into a terminal strip and then wire up the lights?  Or, do I really need an AC transformer?

 

2)  I cannot see myself needing anywhere near 5 amp of current for accessories any time soon.  Is the extra amperage a problem or do I need to throw some resistors in line?

 

Thanks much - looking forward to responses!

Jeff

 

 

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First, let me welcome you to the Forum, a place where you should be able to get answers to many of your questions and have some fun as well.

For your questions;

1) Your lamp posts should run just fine on DC; are these incandescent bulbs we're talking about? Many an HO gauge locomotive has operated on DC with incandescent bulbs over the years. You should be able to use your constant voltage power supply as you described.

2) You will not need any resistors or anything else "in-line" with your power feed. The bulbs will only draw the amperage they need to function. As you grow the layout and add further accessories, you will find that having that 5 amps available will be a blessing in disguise.

Last edited by D&H 65

Welcome Jeff !

As answered above, your 12V dc power supply will be fine for the street lights.

IF they are too bright looking you can add some resistance in line to reduce current flow and lower light output.

You could also daisy chain 2 (or more depending on bulb used) at a time to reduce brightness.

5 Amps will light up several lights that size with good brightness.

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