Low Cost Metal Detector Circuit PCB

Posted on Feb 4, 2014

Metal detectors are usually very complicated and it may be consist of very costly components and metal detector DIY circuits are rare. However this metal detector hobby circuit can be constructed by only a few components such as BC548 and an ordinary AM radio that we usually use. This metal detector schematic shown in the figure oscillates accordi

Low Cost Metal Detector Circuit PCB
Click here to download the full size of the above Circuit.

ng to the frequency of any tuned AM radio. When the circuit powers up, the radio will not produce any sound because the radio oscillatory and the the metal detector oscillator will be in the same frequency and each will cancel itself. We all need to adjust the frequency of electronics circuit of metal detector to the tuned radio frequency. Whenever a metal part come aside the circuit, the cancellation of two signals stops and the radio starts producing sound.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Bandpass filter
    Four-input stereo mixer
    Bedini Motors
    10.58 to 10.74 mhz vfo oscillator circuit
    Low Cost 1000 Watt 300 Volt Rf Power Amplifier For 27.12mhz
    One simple second pulse source circuit
    Audio signal control circuit
    Using a diode as a temperature sensor and 3 1 2 digits Thermometer