I am new here, so hello to all of you out there, and I just started a new Marklin layout project (I am documenting it with photos, so hopefully I will be able to post something in the near future, nothing that impressive anyways). My planning is almost done, preliminary work started. Two things I still need to sort out:

1. I need one of the contact points (24944) to work only one time - send one impulse and then switch itself off until it is switched on by another contact point. (I need this to achieve fool-proof automatic alternating traffic on my layout). How do I do this? I am not going to use the central station for it, it should be done with conventional analog connections. I was thinking about using a relay to cut off the circuit to the switch (that is the impulse from the contact point would cut off the contact point itself). Would this work? Or would the relay get stuck somewhere in the middle because of the interrupted impulse? Or is there some other obvious solution to this I don't know about?

2. I want to use the Marklin grade crossing, but I want it to be over a curved track. Is it easily adaptable / looks resonable? Or should I use some do-it-yourself crossing? What do you recommend?

Cheers,

Woj

PS. Sorry for lengthy writing and repetitions, bad habit I know ;)

Hi Woj, welcome to the forum.

If you want to have your level crossing on a curve, you can use the Viessmann level crossing gates and make the approach ramps etc yourself.

See here:

http://www.viessmann-mod...r_nr=2&sprache_nr=2#

Ray

Welcome to the forum Woj!

1a. I think it works with a simple relay like that; but use a relay which takes some power to switch. With a modern electronic relay, it might switch so fast that whatever you want to switch doesnt'.
1b. Fool proof would be having double contact tracks; the first switching the thing, the second switching the relay and cutting the first contact track.
2. As said, Märklin level crossing may be used, but there will be some space between the crossing and track. You would need to do the isolation and contact yourself replacing the origibal tracks but thats simple with C-track. However, it's better to use contact tracks and a relay, as it might be bad contact with car wheels anyway.
And even better is Viessmann of course; gentle lowering bars instead of the awful abrupt things of Märklin.

/Lars

Welcome to the forum, woj.

Welcome to the forun Woj.

Basil

I used diode brigde rectifiers, but I cannot remember the data (we have not opened our summer house for the season yet, maybe next weekend).
The relay coils do not draw much current, so a 100 mA rectifier should be sufficient, or it is possible to make one with four diodes, e.g. 1N4148 (100 mA) or 1N4002 (1 A).

I cannot remember the condencer either, maybe 100 microfarad, 40 volts. It makes the rectified AC smooth and keeps the relay on a bit longer.

In this case it's analog operation with normal 16 V AC.

Welcome to the forum Woj.

Renato