This electronic device works similar to a metal detector but it does something special: it detects live electrical wires.
Such a gadget is highly useful for electricians doing repair or renovation jobs.
Being able to detect hidden wires will highly reduce the risk of damaging or cutting through them thus making the job safe and fast.
This circuit is specially designed for locating live wires embedded inside non-metallic walls like concrete or wood.
The actual current detector used is an ordinary telephone pick-up coil. This makes the construction of the circuit much simpler compared to winding your own detector coil.
The telephone pickup coil detects the magnetic field created by a live wire.
Electronic Circuits volume 1.0 - Circuit Nr. 36
The complete data of the electronic circuit described above can be found in the following book and is available from Amazon.com.
Click on the image to view the book.