Switching between two lights with a momentary signal from buttons

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jfedorek

Joined May 3, 2020
7
Moderator's note: This thread is a branch from: https://forum.allaboutcircuits.com/threads/reversing-dc-polarity-with-2-latching-relays.85237/page-3#post-1509070

The circuit will remain in whatever state you leave it until you press the button a second time. You will have to add a "power start" circuit if you want it to start in a certain state. Otherwise a J-K Flip Flop is stable until you change an input.
. I am also trying to do a similar idea that I can not figure out. I would like to install indicator light on my kato turnouts. I would like the green light on the track that’s open and a red light on the one that is not. They are a signal coil that only uses momentary power to move the turnout. Reversing polarity moves it back. Can this be done some how ? They are twined together so I am using 18 volts dc with a dual button board.
CA1F25EB-154E-4513-A093-F2B55E5A241C.jpegStuck here because I can’t figure out how to get lights to stay on with momentary power only

jesse
 
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KeithWalker

Joined Jul 10, 2017
1,224
Moderator's note: This thread is a branch from: https://forum.allaboutcircuits.com/threads/reversing-dc-polarity-with-2-latching-relays.85237/page-3#post-1509070

. I am also trying to do a similar idea that I can not figure out. I would like to install indicator light on my kato turnouts. I would like the green light on the track that’s open and a red light on the one that is not. They are a signal coil that only uses momentary power to move the turnout. Reversing polarity moves it back. Can this be done some how ? They are twined together so I am using 18 volts dc with a dual button board.
View attachment 206514Stuck here because I can’t figure out how to get lights to stay on with momentary power only

jesse
See my reply on your thread about model railroad turnout indicators..
Keith
 
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