A device for detecting hidden wiring in everyday life is an indispensable thing. So, many drive nails into the wall for a new watch or picture, without even thinking about how great the risk of damage to the wiring is. Ideally, information about the location of the wiring is contained in the technical documentation of the apartment. If the documents do not say anything about the wiring diagram of the mains, you should pay attention to the location of the junction boxes - as a rule, they leave wires to the switches and sockets in such situations and it is impossible to do without special devices.
So, what do we need:
- Any plastic case;
- Light-emitting diode;
- crown;
- resistor 1MΩ, 1kΩ, 220Ω;
- 3pcs BC547 transistor;
- thick wire for the coil;
- wires;
Let's start assembling the device; the case taken from under putty can be taken by any other.
We solder everything as shown in the diagram.
Install the coil and LED in the housing.
After everyone has sung, we install everything in the case.
When brought to the wire, the LED lights up.
