I did clone pi W (with Atmega
it's sensive and powerfull but it's sense all metals (I want to sense just Gold and not any other metals)
Can you guide me (for Example) adding some circuit for this devices to only detecting gold and drop other metals
thanks
please help me



it's sensive and powerfull but it's sense all metals (I want to sense just Gold and not any other metals)
Can you guide me (for Example) adding some circuit for this devices to only detecting gold and drop other metals
thanks
please help me
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