Mains wire detector

This is a simple circuit which can be used to detect the Mains wire in the hidden wall. This circuit has 6 Million times gain in it. It has a gain of about 200 x 200 x 200 = 6,000,000 and will also detect static electricity and the presence of your hand without any direct contact. As there is always static electricity in our hand so it can detect it as well.The input of this circuit is classified as very high impedance. You will be excited when you will make this circuit. what are the needs of making this circuit i will show you.
1.BC 547 transistor is require at least 3 in quantities.
2.three resistance is required of 220 ohm, 100K ohm, and of 1M ohm. you connect the selected resistance as shown in the picture.
3.one LED(ligh emitting diode)
4.6 volt of dc power supply.
Now connect the circuit as it has been shown in the figure.