Metal detector schematic circuit using CS209A


Posted on Feb 6, 2014

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, oscill


Metal detector schematic circuit using CS209A
Click here to download the full size of the above Circuit.

ator 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 the Q of the LC tank. The detector, is a single 100uH coil. The IC has an integral oscillator the choke forms part of an external LC circuit, it`s inductance being changed by the proximity of metal objects. It is the change in oscillation that is amplified and demodulated. Led 1 will light and the buzzer will sound when the inductance it`s changed. Set up is easy : R5 is adjusted with the LC away from any metal source so that the LED lights and buzzer sounds. The control is backed off so that the LED goes out and buzzer stops. When the choke comes into contact with any metal object that alters its inductance, LED 1 and the buzzer will activate.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    90Vrms voltage regulator
    Positive And Negative Voltage Switching Supply
    Piezoelectric Alarm Circuit
    12 volt power supply using lt3845
    dvd burner laser pointer proper way 18
    Schematics High Power LED mood Lamp PCB
    A DC Fault Protection Circuit for Audio Amplifiers
    1999 Buick Regal
    Telephone Ringer
    Super Fool power amplifier module
    Audio signal control circuit
    By setting the cutoff frequency of the programmable digital low-pass filter
    Six a start and stop intermittent cycle control circuits



    Top