Microcontrollers for Model Railroads

Here's my clinic titled "Microcontrollers for Model Railroading". This clinic is an update and generalization of my "LaunchPad for Model Railroads". It expands the earlier clinic to more microcontrollers. However this clinic dates from 2016, and I did not update it to 2022; so it may be inaccurate in spots. However, the ideas & techniques presented are still valid.
Enjoy!