How to make a metal detector in their home

How to make a metal detector in their home In the category treasure hunting more articles and learn more information about How to make a metal detector in their home Reviews Price Specifications Features Image manuals videos Accessories All this in metal detectors for gold.

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How to make a metal detector with his hands now metal detectors are not cheap, but you can always buy a metal detector and not bother, because the desire to find the treasures does not subside. So what do you do in the shop or buy ready to collect? In principle, everything is rather simple, you need only to find everything you need and make the metal detector at home yourself, and if you can’t-in the shop.



How to make a metal detector in their home



1. to make a metal detector in the home initially, you will need to find an empty box from a regular CD.
2. now you need to find the radio and sticking it back to the first fold the box drive. For this purpose you can use double sided tape or a special adhesive tape.
3. next, in the same way, you must strengthen the calculator on the inner side of the left shutter boxes.
4. now, when such a device is almost ready to begin. Turn on the radio and to ensure that the device works, and work should be ensured in the AM band. It is also necessary to ensure that this did not work at other stations. Now let’s make the sound more and make sure that in addition to noise from receiver you will hear nothing.


5. now check the workability of the metal detector created. Begin to close the box. At some point you hear a strong sound. This means that radio could catch waves, electromagnetic with calculator.


6. Opening the box will disappear so much noise. Now it is enough to open up the box so that the noise was audible, but not much. In this position give the box to any metal object. You can then hear the noise again. Loud sound means that the metal detector model works.


In this case, you can use it to search not only lost at home, but also metal things to go into the forest, or in another place to find something interesting, and perhaps precious. But still the best such article to use at home. On the street is a more advanced model. How to make a metal detector with his hands in the home is not difficult, the desire and knack for tinkering.


How to make a metal detector

Creating a metal detector at home can be a challenging DIY project, as it involves a good understanding of electronics and engineering principles. Additionally, homemade metal detectors may not be as effective or reliable as commercially available ones. If you’re interested in building a metal detector for educational purposes or as a hobby project, here’s a basic guide to get you started. Keep in mind that this is a simplified version, and results may vary.

Materials Needed:

Transistor (NPN):

Common transistors such as 2N3904 can be used.


Two resistors (around 10 kΩ each) for biasing the transistor.


A small capacitor (around 100 µF) for stabilizing the circuit.


Create a simple coil by winding copper wire around a cylindrical form (e.g., PVC pipe). This will serve as the metal detector’s search coil.


A 9V battery or another power source.

Audio Buzzer or Speaker:

To provide an audible indication when metal is detected.


A simple on/off switch.

Breadboard and Jumper Wires:

For building and connecting the circuit.

Basic Steps:

Build the Oscillator Circuit:

Connect the transistor, resistors, capacitor, and the search coil to create a basic oscillator circuit. The coil will be part of a resonant LC circuit.

Adjust Biasing:

Adjust the resistor values to properly bias the transistor and achieve oscillation. This may require experimentation.

Connect the Buzzer:

Connect the audio buzzer or speaker to the circuit. The buzzer will produce sound when the metal detector detects metal.

Power Supply:

Connect the power supply (battery) and add a switch to turn the metal detector on and off.

Test and Adjust:

Test the metal detector by bringing metal objects near the search coil. Adjust the circuit parameters to optimize performance.

Important Considerations:

Experimentation is Key:

Building a metal detector involves experimentation and adjusting component values for optimal performance. It may take some trial and error.

Coil Design:

The design and size of the search coil significantly impact the detector’s sensitivity and performance. Experiment with different coil designs.


Exercise caution when working with electronic components, and follow safety guidelines. Avoid short circuits, and double-check your connections.

Educational Purpose:

This project is more suitable for educational purposes or as a hobby. Commercially available metal detectors are more reliable for practical use.

Before attempting this project, it’s advisable to do thorough research on metal detector circuits and gain a good understanding of electronic principles. Additionally, be aware of local regulations regarding the use of metal detectors, even homemade ones.