Electricians have been hiding this for years! Insert the USB cable into the pencil and be surprised

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Electricians hid it for years! Connect the USB cable to the pencil and thank me. In this video, I will show you how to make a soldering iron from a simple pencil at home. DIY 12V soldering iron.
What I used:
1. Pencil
2. Solder
3. A little wire
4. Power supply: DC 12V.
5. Simple tools