Quote:
Originally Posted by mesy64
tank you wm6
What can be the circuit's sensitivity to small metals such as coins would not?
What do you mean the big metal?What size?
Whether it is used as a real pD?
e high sensitivity of the large size of the ferrite and coil circuit?
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For coin it cannot be used for sure.
For other target sensitivity depend on "virginity" of terrain: in soil hard polluted with civilisation trash there will be too much disturbing signals to differentiate it from useful signals. On clear terrain you can detect one 50x50cm metallic plate at some meter distance (it depend on detecting angle too).
Of course sensitivity (in fact directivity) depend on how large ferrite rod is (you can glue two ferrite rod together to enlarge it).
You need first to tune your Earth signal detector to strongest and steady signal (Earth signals are not the same during time of day).