How to wire up shuttle circuit

[nippy]

Hi! A couple of years ago I purchased a shuttle circuit for a model train set.
Unfortunately, I wasn't ready to install it and now I cannot find the instructions on how to wire it up.
Just wondering if someone would like to look at my photos of the circuit and possibly work out how to wire it up.

It is a circuit that has 3 sensors, the train runs from one end to the other of an open-ended track.
The train will stop, wait for a period of time, then reverse back to the original starting place, wait a while then repeat.

Cheers
nippy

[pebe]

Hi, Can you post pics of the circuit?

[nippy]

Thanks for your reply.
I'll put one of each side to see if you can assist.
I can post more if you need them.

nippy.

[pebe]

Hi nippy,
Thanks for the photos. I can see a CA4130 and what I think may be a PIC chip. It will help to sort out the circuit if you could overwrite the photos to show all the types of transistors and ICs.