We're alluding to circuit schematics, of course; diagrammatic flow charts that describe the exact behavior of a computer chip, printed circuit board, or even your own home-made DIY electronics ...

According to Johnson, "Using Schematics To Troubleshoot HVAC/R Electrical Circuits, Part 1" came about because of feedback from the industry. "It’s shorter than our fundamentals training videos, and ...

The basis of almost everything we discuss here on ExtremeTech is the transistor -- but just above that is a topic that we usually skirt around because no one, even hardcore nerds, really know ...

"This HVAC training video program, is available in DVD format, is somewhat of a departure from what we’ve offered in the past," said Johnson. "It was produced specifically for technicians who really ...