annalogue electrical question semaphore signal control

[Buz]

Hi all

Having lost in a roof leak a while ago, my useful cct note book I put together over the years I am now in need of a cct and notes that was in it.

The cct I need is how to have a twin coil solenoid driven signal stop a train in an isolated section and I can't remember it HELP!!

As I am building single line, will a suitable value diode across the IRJ allow the passage of a train through the back of the signal if it is at stop.

I plan on isolating only one rail, one rail should be enough ??

What value should the diode be given it could be receiving up to full track voltage through it nominally 12v that is if the idea works in the first place.

But just how nominal the model rail controllers are I don't know and I don't want to be replacing diodes every five minutes if the idea works.

Please do not try and convince me on the merits of the Mystic Dark Arts that is DCC I won't answer the question asked or be of any benefit to me either.

regards John

[Buz]

47 minutes ago, Buz said:

Hi all

Having lost in a roof leak a while ago, my useful cct note book I put together over the years I am now in need of a cct and notes that was in it.

The cct I need is how to have a twin coil solenoid driven signal stop a train in an isolated section and I can't remember it HELP!!

As I am building single line, will a suitable value diode across the IRJ allow the passage of a train through the back of the signal if it is at stop.

I plan on isolating only one rail, one rail should be enough ??

What value should the diode be given it could be receiving up to full track voltage through it nominally 12v that is if the idea works in the first place.

But just how nominal the model rail controllers are I don't know and I don't want to be replacing diodes every five minutes if the idea works.

Please do not try and convince me on the merits of the Mystic Dark Arts that is DCC I won't answer the question asked or be of any benefit to me either.

regards John

Woops! nearly forgot diagram so you can work out what I am on about.

regards John

[Buz]

Hi all

Have got a little further but still stuck with the latching relay wiring and how to draw it properly

regards John