Marklin HO LED station lamps

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Marklin HO LED station lamps - Not working with 12V DC

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Peterjs		#1 Posted : 12 March 2024 08:15:41(UTC) Retweet
Joined: 09/03/2024(UTC) Posts: 3 Location: New South Wales, Sydney		Hello forum members, this is my first post. I am setting up a Marklin C-track layout and have recently purchased some Marklin LED station lamps (article 72810). I can get these to work on 16V AC (with flicker) but they're supposed to be OK with 12V DC but they don't work for me. Do I need to solder a resistor to one of the wires? I'm sure the answer is somewhere in this forum, but if someone could point me in the right direction that would be great....thanks.

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JohnjeanB		#2 Posted : 12 March 2024 11:10:46(UTC) Retweet
Joined: 04/02/2011(UTC) Posts: 3,130 Location: Paris, France		Hi Peter A warm welcome to our great community. Here a fervent Märklinist HO digital from Ile de France (near Paris) Here is a glimpse of my C-Track layout I don't have any Märklin recent LED lamp units. They use LED (of course sorry) and include a resistor. If powered with DC source it will not work unless the polarity is right. A 16 VAC LED should work with 12VAC but only less luminous. Adding a resistor will reduce the current and dimm further the brigthness so not a good idea When using 16 VAC a rectifier bridge (4 diodes) and a capacitor will remove any flickering but you may have to include a resistor in series to reduce the current. 16 VAC when rectified gives 22.6 VDC so a resistor of 560 Ohm or 1 kOhm in series could help. I hope to see your project sometimes Cheers Jean Edited by user 12 March 2024 19:43:02(UTC) \| Reason: Not specified
		My layout videos latest vid marshalling yard My Layout

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Peterjs		#3 Posted : 14 March 2024 09:16:01(UTC) Retweet
Joined: 09/03/2024(UTC) Posts: 3 Location: New South Wales, Sydney		Hi Jean and thanks for your welcome & detailed advice. I like the video of your excellent C-track layout, you've certainly got the lighting on the platforms well worked out! Your mention of polarity solved the problem with my Marklin LEDs. I had been following the same yellow/brown protocol as my Faller lights, but I reversed that et voilà! Cheers Peter

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