A very simple proximity detector electronic project can be designed using this schematic circuit . This proximity detector electronic project use a tone decoder integrated circuit ( NE567 ) that will provides a signal with a frequency about 100Khz .
This signal is fed to one sensor . The sensor can be constructed from two cooper or aluminum plates or wires or other conductive material .
This metal detector circuit project is designed using a simple 555 timer integrated circuit. As you can see in the schematic circuit , this metal detector circuit project requires few external electronic parts .
This circuit detects metal and also magnets. When a magnet is brought close to the 10mH choke, the output frequency changes.
A very simple metal detector electronic project circuit can be designed using the CS209A integrated circuit manufactured by Cherry Semiconductor.The CS209A integrated circuit is a bipolar monolithic integrated circuit for use in metal detection proximity sensing applications.The CS209A metal detector contains two on-chip current regulators, oscillator and low-level feedback circuitry, peak detection/demodulation circuit, a comparator and two complementary output stages.The oscillator, along with an external LC network, provides controlled oscillations where amplitude is highly dependent on