You didn’t give away anything. There are several commercial and open source products which do exactly that. Control a model train from a cell phone.

Same thing for what the TS has asked. There are many commercial and open source solutions. Search for “model train automatic reversing”

Goes to show how much in touch I am with aps. I suppose there are toasters that can be controlled by an ap. Flushing toilets. Trimming the lawn. Parakeet Walking aps. Who knows what else may be out there?

 

Goes to show how much in touch I am with aps. I suppose there are toasters that can be controlled by an ap. Flushing toilets. Trimming the lawn. Parakeet Walking aps. Who knows what else may be out there?

Toilets - exists
Trimming lawns - exists
The toaster parakeet are probably still in development.

 

Like I have mentioned at least twice, that same thing has been created in this very general electronics chat forum, and in quite a bit of detail. The thing would slow and then stopm at an exact location, and then return to the start location and slow and stop. The operation was controlled by two switches at each end. No processor or complex electronic systems, either.

 

The OP has a new post for the same question.

Here's the answer.

https://forum.allaboutcircuits.com/...nge-polarity-of-toy-train.171409/post-1534248

 

One thread is enough. Thank you @vu2nan for pointing out the duplication