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WHAT YOU SHOULD KNOW ABOUT SWITCHING POWER SUPPLIES! • WHAT YOU SHOULD KNOW ABOUT SWITCHING POWER SUPPLIES... HOW TO MEASURE ELECTRONIC COMPONENTS ON THE BOARD! • HOW TO MEASURE ELECTRONIC COMPONENTS ON THE BOARD! Repair any LED bulb with this simple trick! • Repair any LED bulb with this simple trick... How to change surface mount integrated circuits with a simple trick! • How to change surface mount integrated circuits with a simple trick!