Note that there are three tabs/categories at the top:

• Hardware: General parts that are needed, most are simple and easy to use.

• IC's & Sensors: Components that have data sheets and might require a little more time to fully understand how they work.

• Engines, track, etc: A list of some suggested N-scale railway items.  HO scale should work as well, but as of Feb, 2023, we've not tested it or heard reports of users successfully testing HO scale.