Variac is a generic trade name for a variable autotransformer. If that doesn't help explain much, let's look at what a regular transformer is, and how they relate to a collection of vintage arcade ...

Very nice, but there is no need for a custom built 1:1 isolation transformer. If you’re having difficulties finding one, simply take any two identical transformers of the required VA rating, and ...

Posted in Tool Hacks Tagged Arduino Uno, current sensor, Isolation Transformer, relay, test equipment, transformer, variac The Shocking Truth About Transformerless Power Supplies April 4, 2017 by ...

Hi, I am trying to verify that a system can run at 50 or 60 Hz and 100 - 240 VAC. Can a Variac be used change both output frequency and voltage or just ...