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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.

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