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 ...

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 ...

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 ...

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 ...

Turn on the variac after making sure the light bulb is connected to the variac properly. Slowly turn the knob to increase the voltage, notice how the color of the filament changes. Return it to zero ...