DaveH: To which I say. "Why hasn't someone made them and offer them for sale"?
We are not all able to "build" such things. How many MR's take the time to make a DCC ammeter?
It's like the Rampmeter/or however you spell it. It is available, and we as a group/MR's are grateful and love it. But not everyone can afford it.
Therefore if someone could sell the device you mention, it should sell pretty well. (Assuming of course, that it don't cost $100.)
I remember the day of DC when almost everyone had a Voltmeter and Ammeter installed on their controllers. And they were cheap enough to allow that. Our club had throttle stands located throughout the layout, about 4 or 5 as I remember. Each had it's speed, direction AND V&A meters. Before the day of walk around wireless or cable controllers.
????????????????????? Morgan Bilbo, DCC since 8/18. Model PRR 1952.