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Metal Detector for security :)
If the coil was formed into a pen/pencil type form factor this might make a good pinpointer for locating hard to find small items like coins etc after your main metal detector has found the approximate location of said coin/item.
Metal Detector for security :)
If the coil was formed into a pen/pencil type form factor this might make a good pinpointer for locating hard to find small items like coins etc after your main metal detector has found the approximate location of said coin/item.