I have been looking to use Arduino to add functionality to my model train layout. My favourite is a model speedo that calculates and displays the speed of trains passing between two sensors.
See Arduino Your Home & Environment: Arduino Model Railroad Scale Speedometer - Finished for the project.
The project mentions Adafruit 7 segment backpacks.
What are these?
Do I need to use them?
Does Arduino make a similar product?
Thanks
Nippy