Digital volt/ammeter ?

[ezdays]

I want to put this out to the membership.
Would a volt and ammeter with digital display be practical for a model railroad? I was wondering if the display might bounce around too much to be readable, or if there is some sort of damping mechanism (circuit) that can be fitted.

If it's been done, is there a circuit somewhere that can be used?
What I think I would like is a little box with two displays and four terminals.

A few years ago I wanted to do the same thing and had bought some inexpensive digital multimeters for just that. I decided against it because with two Tech4/250 DC controllers, four meters would take a lot of room to house them all. That, plus the logistics of possibly switching scales, powering the meters and where to put them just discouraged me. I doubt if you'd be seeing a lot of "bounce", but if you're concerned, you could dampen this with a capacitor. That has its drawbacks though, especially with the Tech4 since it is not true DC, but rather pulsating DC. Also, you would only need two terminals out. I can draw you a circuit if you want.