@robotbuilder Unfortunately I don't know much about the transformer. It was salvaged from an APC 350VA UPS. It was just convenient to grab it for te...

@davee Thanks again. With your help I think I have clear picture. Before deciding to buy a transformer I rumaged through several pieces of hoar...

@davee I've checked the datasheets and the schematics. This is what I mean by two identical secondary windings. I sounds like I can create a cen...

I hadn't considered that the meter will vary its current requirements. I am going to try to measure that and see if it is significant. Also, it is a...

Yes the switches work. The lights do not and that is not a big deal. So I do not need to make a mystery out of it. @DaveE, The naming convention ...

I'm still stumped. I did the tests stated in the quote and none of the switches lit up. I tried with 12VDC, 24VDC and then with 120VAC through a lig...

@zander I suspected the switches were lighted and now I see "LIGHT" written vertically next to the third terminal of the push button switch. I use...

@davee Thank you for your thoughtful answer. I don't have the knowledge to proceed with anything but undeserved confidence. If there was a real n...