10 Best Variable Autotransformers for Electronics Work (May 2026) Honest Reviews
A variable autotransformer, commonly called a variac, is one of the most versatile tools you can have on your electronics workbench. I’ve spent years working with vintage equipment, testing new designs, and helping others safely bring long-dormant electronics back to life. The ability to precisely control AC voltage from 0 to 130 volts makes variacs … Read more