Alexey VoroninDetection ranges:
coin 3 kopecks USSR 1979 - 23-24 centimeters,
hard disk platter - 34-36 centimeters
Description (in russian) - https://acdc.foxylab.com/node/47
Air tests of DIY pulse (Arduino Nano based) metal detector FoxyPI
A project log for FoxyPI - Arduino Nano metal detector
Homebrew pulse metal detector on Arduino Nano
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