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How Solenoids Work
Paul Evans
-
Apr 23, 2019
8
Inside Thermal Expansion Valves
Paul Evans
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Feb 13, 2019
0
Filter Driers How do they work
Paul Evans
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Feb 7, 2019
0
Three Phase Electricity Explained
Paul Evans
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Feb 18, 2018
12
How Inverters Work
Paul Evans
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Dec 15, 2017
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How thermostatic expansion valves work
Paul Evans
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Nov 11, 2017
10
Chillers – What are they? HVAC
Paul Evans
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Apr 6, 2017
8
Refrigeration cycle, essential knowledge.
Paul Evans
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Jun 7, 2015
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R422A Pressure Enthalpy Chart
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HVACR Time Control Basics
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Latest Content
MOSFET vs Transistor vs Relay: Most People Get This Wrong
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Jul 8, 2026
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Learn the key differences between MOSFETs, transistors and relays. This beginner-friendly electronics tutorial explains how BJTs and MOSFETs work, why they are used for...
Why This Doesn’t Make You Safe
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Why This Circuit Works When It Shouldn’t
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Edison’s Missed Billion Dollar Idea
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How to ACTUALLY Use an Oscilloscope (Beginner-Friendly Guide!)
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How Electricity Works- For Visual Learners
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Power Factor Explained – Your Electricity Bill Money Drain (Reactive Power)
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Clamp Meter
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