I’m getting a bit frustrated working on amps, doing things that are voltage dependent, and then discovering that the wall voltage when I started a project is not the same as when I complete it. Last night I was messing around putting together a bucking transformer for my latest build. Started testing with 121.4 at the wall, checked some time later and it was 114.7. Anyone use a fancy device to keep a steady voltage? Is this something that can be built affordably?