Model railroading is a multi-skill hobby. Back in the 1970's when I went to trade school, digital meters were still rare, and we used analog for most things. Most of us have one of these devices, and they can be had relatively cheaply. They are useful around the house and on the layout.
There are a lot of videos on Youtube on using meters, but this one is one of the best I've seen. Please take 12 minutes to watch it, and give the author a thumbs up (not affiliated) .. He also has a nifty cheat sheet you can download.
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And the cheat sheet ..
