Metal Detector

1112

1d 05:21:47

This is a metal detector circuit I found on the internet, it uses an Arduino to detect frequency changes of the oscillations of the LC circuit. 

Here is a link to the project : http://blog.atmel.com/2013/07/25/build-your-own-metal-detector-with-an-arduino/

published 10 years ago

hurz

10 years ago

Not professional but should do the job for fun ;) One hint, from schematic i can see 2 x 22nF and the text says 160kHz oscillation. This would need about 90uH as coil. Anyway, you have to find a way to wire this air coil by your self and as reference you could measure the frequency of your oscillator. Hope this helps.

EvilDuck95

10 years ago

Thanks hurz! I have changed the coil inductance and the frequency is now correct.

hurz

10 years ago

BTW, both emitter resistors can be combined to one ~560Ohm. And let us know how it works in real please

SuporteTecnicoID

9 years ago

Good circuit

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