Metal Detector DIY

Posted on Feb 5, 2014

The heart of this DIY metal detector circuit is CS209A. The metal detector is build with one 100 µH coil. CS209A has one oscillator which forms a 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 f

Click here to download the full size of the above Circuit.

rom any metal objects) so that LED 1 will light and the buzzer sounds on, and then VR1 will be trimmed until led and buzzer are off.

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