Magnetometer MWB2.

[JoyJo]

I've seen enough magnetometer projects, but I haven't seen a detailed description of the manufacture of a search sensor. Could you describe the manufacturing technology of the search sensor?

[Fisher]

More photos

[Fisher]

Sensor.

[Fisher]

Instructions for making a sensor. In Russian.

[JoyJo]

And what are the requirements for the cable? What is its optimal design?

[Fisher]

And what are the requirements for the cable? What is its optimal design?

I'm using a regular microphone cable. The polarization current is about 1A. Two conductors in the shield.

[j570]

Hello. Very interesting project. Could you please publish the Gerber files and the parts list?

[Fisher]

Hello. Very interesting project. Could you please publish the Gerber files and the parts list?

Gerber files. The list of parts will be published later.

[j570]

Thank you very much. Could you describe your experience with this magnetometer? What are the typical detection ranges? For example, a shovel, a car?

[Fisher]

Hello. Very interesting project. Could you please publish the Gerber files and the parts list?

List of parts.

[j570]

The photo from inside the magnetometer shows a NEO-M8N GPS module, and the parts list shows a Beitian BE-800. Which module should I use?

[Fisher]

The photo from inside the magnetometer shows a NEO-M8N GPS module, and the parts list shows a Beitian BE-800. Which module should I use?

You can use both the first and second. Both work. $GNRMC and $GNGGA, UART baud rate = 9600 - required parameters.

[Fisher]

The sensor's inductance, together with capacitors C22, C28, C34, C35, C36, and C37, forms an oscillatory circuit. This circuit is tuned to the following frequency ranges:
Range 6 - C37 - 3320Hz
Range 5 - C34 - 2869Hz
Range 4 - C36 - 2463Hz
Range 3 - C35 - 2111Hz
Range 2 - C28 - 1800Hz
Range 1 - C22 - 1511Hz

[Fisher]

Thank you very much. Could you describe your experience with this magnetometer? What are the typical detection ranges? For example, a shovel, a car?

The magnetometer detects a magnetic anomaly from a passenger car at a distance of 8-12 meters. This range depends on the vehicle's position relative to the Earth's magnetic field and the magnetometer's relative position. A T-34 tank is detected at a distance of approximately 20 meters. A DP-27 machine gun is detected at a distance of approximately 6 meters.

[j570]

The sensor's inductance, together with capacitors C22, C28, C34, C35, C36, and C37, forms an oscillatory circuit. This circuit is tuned to the following frequency ranges:
Range 6 - C37 - 3320Hz
Range 5 - C34 - 2869Hz
Range 4 - C36 - 2463Hz
Range 3 - C35 - 2111Hz
Range 2 - C28 - 1800Hz
Range 1 - C22 - 1511Hz

What type of capacitors did you use? What type of dielectric? Relay R2-Nil-1C-12. Could you suggest an analogous type? I can't find one. Could you attach a picture of the board so we can see the component layout or do you have a file with the component layout on the board? I'm planning to build this magnetometer, so I have some questions.