Amazon Video

Electronics knowledge test! What is the secret component? NO! Is not a battery!

I can bet no one can solve this test :))))))))))))))))) The right answer it will be reveal in one week. Note: The switching power supply board from the video is based on LM2596
working on voltage range 4.5V to 40V
First clue:
The gimmick:
The answer:
USB power meter:
Thermal camera:
ST-862D Hot Air:
Electric Screwdriver:
Rosin colophony:
CPB Heating Pad
Low melt solder:
Wick wire:

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