A variable power source features a way for users to change the output voltage, and, in some instances, the current. Variable AC power supplies use transformers or autotransformers to change the AC-to-AC voltage and current though leaving the power resource frequency the same. The best rule of thumb is that https://powersuppliesrepair88776.theblogfairy.com/29820175/the-best-side-of-power-supplies-repair