Which circuit is used in metal detector?

The LC Circuit, which consists of L1 (coil) and C1, is the main metal detector part of the circuit. With the help of this LC Circuit, which is also called as Tank Circuit or Tuned Circuit, the TDA0161 IC acts as an oscillator and oscillates at a particular frequency.

How do you make a metal induction pulse detector?

Pulse Induction Metal Detector With GreenPAK

  1. Step 1: Pulse Induction (PI) Basics.
  2. Step 2: GreenPAK New Circuit Implementation.
  3. Step 3: Other Circuitry.
  4. Step 4: Sensing Coil.
  5. Step 5: Assembly of the Metal Detector.
  6. 8 Comments.

What frequency is best for metal detectors?

The best frequency for metal detecting is somewhere in the range of 5 kHz to 15 kHz. This range is where most general-purpose metal detectors are tuned too, and also the easiest to manage for beginners.

What is the difference between pulse induction and VLF?

The VLF transmitter and receiver coils measure the phase shift between transmitted and returned frequencies. Pulse induction metal detectors send pulses of current through their coil(s) and measure the time length difference between the expected reflected pulse and the actual reflected pulse.

What is detector circuit?

In radio, a detector is a device or circuit that extracts information from a modulated radio frequency current or voltage. The term dates from the first three decades of radio (1888-1918).

How do you make a 555 IC metal detector?

Working of Metal Detector Circuit: Monostable multivibrator is characterized by giving high output when there is low pulse signal to the input trigger pin. The duty cycle of output pulse from IC 555 is proportional to the Inductor L1 and Capacitor C1 which is connected in series to the trigger pin of IC 555.

What frequency is gold found at?

Gold can be found at 14 kHz and higher. At frequencies between 3 kHz and 7 kHz, silver, copper, and brass can be found. At frequencies between 4 kHz and 8 kHz, nickel and aluminum are most readily found.

How can I increase the range of my metal detector?

How to Increase the Depth of a Metal Detector (Range Adjustments…

  1. sweep the coil close to the ground.
  2. increase the sensitivity setting.
  3. reduce the discrimination setting.
  4. install fresh batteries.
  5. upgrade to larger coil.