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This was previously shared on another thread, but thought the example that I based my trolley on would be good to leave here.
https://www.raspberrypi.com/products/build-hat/
I suppose this is still purist too.
John, definitely looks like it would be worth a try! I like that it uses all LEGO parts. Driving it with a laptop or computer isn’t as ideal as storing everything on the hub, but it seems like it would be worth it since it would yield such a dynamic layout.
apparently I posted what John already posted because John is ama-singer than me. see what I did there?
I was playing around a bit with the pybricks hub-to-hub communication (described here). It is an experimental feature but worked ok for me. I set up a short track with a section of yellow tiles. I ran a train on it with a color/distance sensor pointed down. I had the train hub briefly broadcast when it crossed the yellow tiles. A technic hub nearby then ran a motor for a short duration when it received the broadcast from the train. This could be used to automate things like crossing gates and switches. There are probably alternatives like putting a sensor next to the track to detect the train, but it was pretty neat to have two hubs coordinating.
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