FK919 - Metal Detector Project

This circuit is a practical demonstration of the principles used
in metal detecting equipment used by the military, police and
security companies when searching for weapons. The same
principle is used to locate embeded wires before drilling into walls,
or to locate buried treasure! The FK919 will detect both ferrous
metals such as iron and steel, and non ferrous metals such as
copper, bronze, aluminum. The resonance of the coils is adjustable
to optimize performance for differing locations and search criteria.

Technical data

- Power supply : 9VDC.
- Electric current consumption : 40mA. max. (working)
- Sensitivity : An adjustable potentiometer is equipped
- Maximum detecting range: 50 mm (approx.)
- IC board dimension : 3.01 in x 1.71 in