Have the resister etc but the led has a long lead and a shorter one. Which one is positivewhich one is negative? For what its worth it is a Lifelike f3, Dcc of course.
Mike
The standard polarity for an led is positive long, negative short. That said, you can always test it. If it works, you've got it right, and if it doesn't work, you've got it wrong. You won't damage it by applying the voltage in reverse.
Just be certain that you have the correct resistor. Too low resistance and the led will burn out very quickly, eg immediately.
Mike,
Here's a helpful diagram:
The longer lead is the anode (+); the shorter, the cathode (-). Your colored wires (e.g. white & yellow) will always go on the cathode and the blue (common) wire on the anode.
The resistor can go on either the anode or cathode. For consistency I always put it on the cathode but, again, it doesn't matter.
Two other ways to differentiate between the anode and the cathode:
Hope that helps...
Tom
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.
The below links might be helpful. They are for me.
http://www.members.optusnet.com.au/nswmn1/Lights_in_DCC.htm
http://www.members.optusnet.com.au/nswmn/dcc_articles.htm
rich
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