Everything on model trains, model railroads, model railways, locomotives, model train layouts, scenery, wiring, DCC and more. Enjoy the world's best hobby... model railroading!

Make a Realistic Residential Street Scene with Realistic Detailing.

Using LED as Indicator if DC Control is On

Koot models in HO and queries:

“Do I install the LED in series or across the two power leads going to the track to indicate power on?”

5 Responses to Using LED as Indicator if DC Control is On

  • David Stokessays:

    My understanding is that the resistor goes inline on the + side but the supplier of your streetlights should have something to say on the subject.

  • Kevin Chingsays:

    be very careful how you wire them they are 3 volts and your line voltage is 0 to 12 volts you will need a resistor to limit the voltage on the full 12 volts but they may not light until the voltage reaches about 5volts

  • Geoffsays:

    If it is installed in series, then it will only light up when the circuit is complete, ie when the locomotive is on the track. If you want a visual cue that power is going to the track when no locomotive is present, then it should be across the two power leads.

    • Kootsays:

      Thanks Geoff. Across is what I am going for,

  • Kootsays:

    Thank guys
    Across the leads is my way to go.

Leave a Reply

Your email address will not be published. Required fields are marked *

Add a photo or image related to your comment (JPEG only)

Download Your Free Catalog

Use Tiny Railroad Micro Controllers

A micro controller is basically a small programmable computer device to help the model railroader “make things operate.” It is clever way to realistically replicate the movements, actions and functions you are likely to see on a full size railroad.

Model Train DCC HELP

N Scale Track Plans

Watch Video

Model Train Help Ebook

Watch These Club Videos

Club members access helpful new resources each month: diagrams, video tutorials, articles, track plans and more. Watch the tour videos here.

Scenery Techniques Explained


Model Railroad Building House Plans

rail yard buildings


Submit Your Model Railroading Questions!

Before you submit your model railroading question please add some feedback, answers or comments to other postings on this model train blog. What goes around comes around... so if you can help others in the hobby, someone else may help you.

Important - Please add plenty of supporting details to any question you submit (eg. scale, solutions you have already tried etc.) , as the clearest and best questions usually get the best answers. Also, please check your spelling and punctuation as all questions need to be approved by the blog moderator prior to publication. Approved questions are normally published within a week (if not sooner).

Submit your model train questions here.

Scenery & Layout Ideas


Submit Your Article

Would you like to write an article and have it published?

Preference will be given to articles that help others progress in the hobby, maybe suggesting an idea for their layout, a quick tip or two... or perhaps a little bit of good advice based on your model railroading experiences.

We are all in this hobby together, so the more we can do to share ideas and help each other, the better.

Submit Your Article Here

Model Railroading Blog Archive

Reader Poll

Sorry, there are no polls available at the moment.