I have a small rig for testing locos or chassis for radio control.
It consists of a box that connects to a short test track,
it is a piece of new track that I wipe clean occasionally.
The box has two Li-Pos, a couple of switches, and push button.
It also has a meter that measures current.
(you could use a digital multimeter or similar and plug it in)
One of the switches selects either one or two Li-Pos,
and the other reverses the polarity to the track.
The push button connects the power to the track.
This setup allows you to try a loco or chassis,
to see how it runs with one or two Li-Po cells driving it,
in particular how fast it runs and what current it takes.
It's a pretty good indication of if the loco can be converted to R.C.
and if it needs one or two cells to drive it.
And a non-destructive test, if you see a loco for sale at an exhibition,
you can just try it on the track, no need to take anything apart.
Okay, now we can all dive into lexical semantics -
What the word 'analogue' means in context with control of electrical motors,
and whether it's appropriate to use the term when describing,
a variable voltage that is only defined by its mean value.
In other words -
Is it woke to use something generated discretely,
make it appear smooth, and then call it so?