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Autotransformer / Variac

Autotransformer / Variac Reviews 

3 Popular Adjustable Voltage Transformers with Digital Displays

February 19, 2019February 20, 2019 Circuit Specialists 1 Comment

A few years ago, we wrote a blog post describing 10 uses for adjustable voltage transformers, one of which was

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All Posts Autotransformer / Variac DIY Multimeters Power Supplies Resistors Tutorial / How-to 

How to make a shunt current resistor from Electroboom

February 5, 2018February 5, 2018 Circuit Specialists 0 Comments

How to make a shunt current resistor you ask? Before you learn how to make a shunt current resistor you

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Monitoring Variac Output with a Digital Panel Meter (DPM)
All Posts Autotransformer / Variac DIY Experiments Multimeters Panel Meters Power Supplies Tutorial / How-to 

Monitoring Variac Output with a Digital Panel Meter (DPM) [tutorial]

July 22, 2016May 5, 2020 George 4 Comments Digital Panel Meter, Hacks, How-To, Modification, Tutorial, Variable Autotransformer, Variac

While most users are not concerned about the absolute readout of variac output voltage, a more accurate digital meter may

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Variac Crock-Pot Experiment
Autotransformer / Variac DIY Educational Labs Experiments Multimeters Power Supplies Reviews Safety Tutorial / How-to 

Adding Temperature Control to an On/Off Crock-Pot

May 23, 2016May 23, 2016 Cody Mack 0 Comments Crock-Pot, DIY, Experiment, Hacks, How-To, Mods, Variable Autotransformer, Variac

Today at Circuit Specialist HQ, our awesome accountant Anita brought in some delicious buffalo chicken cheese dip. After we all enjoyed

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All Posts Autotransformer / Variac 

Ten Uses for an Autotransformer, or Variac

August 1, 2014August 21, 2014 George 0 Comments Autotransformer, Autotransformer / Variac

1) Testing a repaired electronic device. After performing a repair on a piece of electronic equipment, it is best to

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All Posts Autotransformer / Variac 

Using a Variac to Power Up an Old Radio or Amplifier

July 25, 2014March 14, 2018 George 0 Comments Autotransformer / Variac

It is best to monitor the AC current drawn by the unit as it is powered up, which indicates the

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Autotransformer / Variac 

Transformers and Variable Autotransformers

June 19, 2013June 20, 2014 George 0 Comments

Before we get into what a variable autotransformer is and how it works let’s take a look at regular transformers.

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Autotransformer / Variac Power Supplies 

Variable AC Power Supplies

April 10, 2013June 20, 2014 George 0 Comments

Because controlled electrical energy is useful for a number of things, power supplies are one of the most popular types

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Autotransformer / Variac 

Variac and Auto Transformer Fundamentals

August 3, 2012June 23, 2014 George 0 Comments

A variac is a vary simple device to use.  It’s purpose is to raise or lower the voltage that enters

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