Quote:
Originally Posted by Clondike Clad
How can you tell gold from silver with this?
Can you pick up rings and how far?
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No at high distance, just 5 meters. Better for big items as treasure.
Now I replace magnetic speaker by piezo, this not disturb as speaker based on coil and magnet. Also consumption is lowest.
Now, I'll replace the audio amp of radio by circuit based on NE5534 or similar. This is just for to try ferrite.
Regards
Esteban