Metal detector circuit diagram 8

Posted on Feb 7, 2014

The metal detector circuit is composed of the probe oscillator, PLL phase-locked loop circuit and the audio alarm circuit, and the circuit is shown as the chart. Probe oscillator is composed of the detection coil L, transistor VI, resistors RI ~ R3, capacitors C1 ~ C5. PLL phase-locked loop circuit consists of integrated circuit IC1, resistors R4

Metal detector circuit diagram 8
Click here to download the full size of the above Circuit.

~ R8, capacitors C7 ~ Cll. Audio alarm circuit is composed of the transistor V2, comparision amplifier integrated circuit IC2, buzzer HA, resistors R9 ~ R14. R1 ~ R14 use 1/4W carbon film resistors or metal film resistors; R15 uses 1/2W metal film resistor. RP uses small potentiometer or variable resistor. V1 and V2 use 59018 or 2SC1815 NPN silicon transistors.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    0-30 Volt Laboratory Power Supply
    LED Voltmeter for Cars
    Moisture detector with pump controller
    Long distance infrared transmitter circuit diagram
    Solar to 6V Batt to LED emergency light circuit
    Two-Zone Burglar Alarm
    PIC dual Thermometer
    Shaft type part temperature measurement system become by 51 one piece organizations
    digital clock circuit diagram
    dc control for triacs
    TV cascades
    Adjustable from 3 to 9V 100mA power supply circuit
    Common collector amplifier via a DC and AC