Metal Detector DIY Circuit
The heart of this diy metal detector circuit is CS209A. The metal detector it is build with one coil of 100uH. CS209A has one oscillator wich forms an LC circuit, the inductance of the coil will change when it is near metal objects.
LED 1 will light and the buzzer turns on when the coil is changing inductance. The setup is easy, VR1 is adjusted ( away from any metal objects ) so that LED 1 will light and the buzzor sounds on, and then VR1 will be trimmed until led and buzzer are off.
DIY metal detector circuit
about 1 year ago
you should mark the connection points of the IC and also what is 2n2.
about 1 year ago
2nF2V
Two nano farads ; two volts
about 1 year ago
This is not such a good design for a metal detector, you should search something else. 2n2 = 2.2 nano Farads
about 2 months ago
1000pf=1nf
1000nf=1mf
so 2.2nf=2200pf or0.22mf
about 2 months ago
correction to “so 2.2nf=2200pf or0.22mf”
0.22uF = 220 000pF.
Here is the correct way:
…so 2.2nF=2200pF OR 0.0022uF.