Invisible Broken Wire Detector that is used to check broken or disconnected wires inside walls. Detects the broken cable by detecting the presence of AC voltage in the cable. When there is alternating voltage near it, then it will start to sound and the LED will light up while there will be no AC voltage or if there will be a broken wire, then the buzzer will remain still and the LED will go down. This circuit can also serve as an EMF detector and can detect the electric field generated by alternating current (AC).
Devices running on A.C, such as electric irons, grinders, air conditioners, flood lights, are powered by long 2-core or 3-core wires connected to the AC drop. Due to the use of these devices for a long time with the flow of high current or due to mechanical stresses, these cables can be broken somewhere.
It is very difficult to locate the exact location of the broken wire, because now days the electrical wires are installed inside the walls using PVC pipes. And because of this, people generally prefer to replace the broken rather than repair it. Therefore, to find the exact position of the broken wire, this broken wire detector is very useful which detects the broken wire by detecting the EMF generated by the alternating current in the wire. It stops to emit a beep where the broken wire is found and the LED on the circuit will also go down.