how to make an elecrtric wire locator?

i am unable to make an electric wire locator so pls help me out?

Picture of how to make an elecrtric wire locator?
jeff-o6 years ago
If you replace the microphone with a coil in this instructable, you can use it to "hear" wires in walls.
NachoMahma6 years ago
. Are you wanting to locate wires inside of residential walls, buried underground, under water? Are the wires energized or not?