Common Return with split mode supplies

Application is Model Railways I am aware that I can use common return on two supplies if each is fed from a separate transformer or two not connected secondary windings on the same transformer. I have a job which requires regulated voltages and I want to use two simple plug in the wall split mode supplies. Just standard mains to regulated DC adapters. Can I use common return on these? One will supply 3v always in the same direction, the other 12volts variable and reversible.

by Waterhouse
October 20, 2020

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