Help with connecting two LED with a diode

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Help with connecting two LED with a diode

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einotuominen		#1 Posted : 20 July 2023 14:05:38(UTC) Retweet
Joined: 19/09/2022(UTC) Posts: 382 Location: Kaarina		Hi, Lot of stuff going on on my work bench, and lot of help required as you may have noticed on my recent postings Anyway I need to connect two LED lights of an electric loco in a way that one light is always on in both ends of the loco and second light is on depending on the direction of travel. See this loco shell and please have a look at the light conductors. So in the direction of travel both front lights need to be on and also the top light while at the other end the right side light is on. So here is a picture of how my two LEDs are currently connected. On the other end of the loco it is the same thing but in mirror of course: The loco is an old delta loco that had lightbulbs and a PCB board with diodes to handle all this. I had to remove the PCB board in order to make room for speaker and buffer capacitor. I have the diodes from that board but when I connect them like in the picture above, current will not flow from left to right and the other LED remains turned off. So I'm guessing the old diodes are of wrong value? What kind of diodes should I use and is my thinking correct here? Thank you, once again! -Eino


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mmervine		#2 Posted : 21 July 2023 02:32:31(UTC) Retweet
Joined: 30/01/2006(UTC) Posts: 1,884 Location: Keene, NH		The best way to do this is to wire the lights that will always be on to AUX1 and set that to be on with F0, regardless of direction. Wire the other lights to the normal forward and reverse wires. This is also how the Swiss lighting effect is done. You won't need the diodes, if you do this. Mark
		Märklin C-track, Marklin Digital & ECoS, multi-era French & Swiss http://www.ete-ene.org/m...mervines-layout-gallery/

1 user liked this useful post by mmervine		marklinist5999
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einotuominen		#3 Posted : 21 July 2023 07:47:47(UTC) Retweet
Joined: 19/09/2022(UTC) Posts: 382 Location: Kaarina		Originally Posted by: mmervine The best way to do this is to wire the lights that will always be on to AUX1 and set that to be on with F0, regardless of direction. Wire the other lights to the normal forward and reverse wires. This is also how the Swiss lighting effect is done. You won't need the diodes, if you do this. Mark And this is exactly how I ended up doing it. Thanks! -Eino


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