@Gary Marsh posted:... I have 3 different sets of these crossing signals on different parts of my railroad. Right now I'm using a transformer to power them. They are all wired separately and they are activated by using Z-Stuff DZ-1070 & DZ-1075 sensors. I can purchase 3 of the Buck Converters of I need to. I wired like MTH advised from their directions on the box.
At "only" $3 each (free shipping from Asia), to your point the closest exit may indeed be to just splice a Buck Converter into each bell module as diagrammed earlier. We know this works.
But to your initial question, is there a way to lower/adjust the operating voltage just once and share that conversion amongst your 3 (or more if you expand) crossing signals/bells? I'm sure this can be done with some research and trial-and-error; and, yes, I get that the "error" part is a wet blanket. This would involve confirming the operating voltage range of the crossing signals - whether they operate on AC or DC (apparently they do per John H comment above). There is an issue with sharing the AC and DC common going thru a DZ-1075 which might dictate using a different method of lowering the voltage such as the AC diode-dropping method (instead of a buck-converter). And then there's the issue of what kind of AC transformer you have (pure-sine or a chopped-sine). So it can get awfully tedious for what on face seems like a simple problem!
