Creating a metal detector circuit having great fun because through it you can easily detect metal. Here in the circuit, we use a transistor to make it easier to make.
If we increase the diameter of the copper coil then its power of detecting metal will increase.
This circuit is a simple prototype circuit to test the waveform when metal is that near to the copper coil.
When we connect an oscilloscope to this circuit and get a metal nearer to the circuit then the oscilloscope shows the bigger waveform.
What is a metal detector Circuit?
Metal detector circuit which contains copper coil and when a metal is kept near to this copper coil, the oscilloscope shows the change in the waveform.
A simple circuit which is made up of transistor and few More components which are easily found in old scrap circuit.
1) BC 547 Transistor
2) 220R, 47k Resistance
3) 2x 1nf, 10nf, 4.7nf, 47uf Capacitor