Thanks for everyone's very welcoming comments. My interest is primarily in the early 90s era around the Cardiff area (Aus) in HO scale.. but...
I had thought of using a ESP32 and using either wifi or bluetooth to send speed/acceleration information to a phone or external display... or...
Thanks for you kind comments. I always struggle to read someones code, so I've tried to add comments as much as possible. Let me know if you need...
A little while ago, a mate asked if its possible to build a wagon that can measure speed. I thought it may be an interesting excercise and it may...