An electrician friend of mine asked me if I could recommend a regulator to step down 125vac down to 118vac with a load of 2.5 amps. He would like 3 amps to be safe.
Normally I deal with low voltage DC and would use a buck-boost regulator to get a very consistent output voltage despite some fluctuation in the input and it has a trimpot for setup/calibration to prevent people from accidentally bumping it or messing with it easily. I don't know if there is a good equivalent for AC loads. Will something like this work, or is there something else that may work better? The load is non-inductive, it is a sensor, so the current draw should be fairly stable. I know we could achieve a roughly similar result with a potentiometer as a voltage divider or a resistor, but we're looking for something more stable and efficient that will adapt to some fluctuation.