Hello! How to make a hidden wiring detector with your own hands from scrap materials at home!

We will need:

- NPN transistor C945 (3 pcs.)
- LED 3V, 5 mm,
- resistor with nominal 1 kΩ,
- thin insulated copper wire (diameter 0.5 mm),
- connector for the crown,
- battery crown,
- soldering iron
- and so on.

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