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.

Underground Cable Locator, Seesii Wire Tracer Detector with Earphone, Test for Network Cable, Telephone Line, Electrical Circuits, Pipelines, Underground Dog Fence Ducts Walls Buried Cables Locator . Thank You

VEVOR Underground Cable Locator, 6.5 FT Max. Detection Depth, Wire Tracer Break Detector Finder
https://www.youtube.com/watch?v=VbGmNSXZ9N8

6.5 FT Max. Detection Depth, Wire Tracer Break Detector Finder with Earphone, 3280 FT Max.Detection Length Cable Tester for Pet Fence Buried Sprinkler Valve Irrigation

There are two main detection principles:

Passive location – Used to locate an electromagnetic field already present on a utility
Active location – Adds a specific signal using a signal transmitter onto a located utility

Applying an active signal

A majority of buried utilities may not be detected by searching for passive signals using the locator on its own. These hidden utilities may not carry a live current or radiate radio signals, requiring a signal to be induced directly onto the utility to locate them. To detect these additional utilities, an electrical current or signal will need to be applied onto the buried metallic utility, which enables the utility to be traced and identified by the locator.
Induction mode

Induction is a quick and simple way to apply a signal to a utility without the need to make any physical connection. An internal aerial generates a magnetic field into the ground. Any buried metallic utilities routed within close proximity to the signal transmitter will be induced with the signal, allowing the utility to be located and traced with a cable locator.
Connection mode

This is the most efficient way of applying a signal to a utility and should be used whenever possible (especially when taking a depth reading). The output from the signal transmitter can be directly connected to a cable or pipe. A circuit is completed by a connection to an earth stake or ground connection point.

Locating the signal

To detect the magnetic fields emitted from a buried utility, the locator uses aerials built up of wire wrapped around ferrite rods. The aerials are used to amplify the small electromagnetic signals emitted by the utility and to provide an input to the locators’ circuitry.

Leica DD100 Series features an enhanced Signal Strength Indicator (SSI), a graphical display detailing the signal strength as a bar graph and a numerical SSI reading. The highest signal reading (peak response) is obtained when the utility is directly below the locator.

Safety is the number one priority but finding the location of cables can also reduce costs for utilities and contractors. There are huge costs associated with damage to buried plant, and cable location decreases risk of damage.

Proper cable location and wire identification can reduce costs and damage.

Read this paper to learn how fundamental physical phenomena can be applied to location and identification of wires and cables.

https://www.cablinginstall.com/white-papers/whitepaper/14283151/tempo-communications-locating-and-identificationfinding-cables-and-identifying-wires?pk=TEMPO-002-em2_WP_10262022&utm_source=CIM+Whitepapers/EG&utm_medium=email&utm_campaign=CPS221024096&o_eid=7211D2691390C9R&rdx.identpull=omeda|7211D2691390C9R&oly_enc_id=7211D2691390C9R