Recommended · for beginners
Electronic Basics #1: The Multimeter
Why people recommend it
Recommended as a first stop for anyone unsure how to use a multimeter safely, and as part of a wider electronics basics series.
Watch for: watch before measuring current on a live board
In their words
Here's a YouTube series that explains this stuff pretty well.
ad555 on electronics.stackexchange.com, Nov 2017. CC BY-SA.