DIY ULTRA SENSITIVE Arduino EMF Electromagnetic field Detector

This time I will show you how to make a extremly sensitive electromagnetic field measurement device made with the Arduino microcontroller. Electromagnetic fields are a combination of invisible electric and magnetic fields of force. They are generated by many devices like power lines, kitchen appliances, mobile phones, computers, but they are also generated by natural phenomena like the Earth’s magnetic field. Еven the human brain emits extremely weak EMF signals that are thought to be potential mediators of telepathy.
The EMF detector introduced in this project is based on the Arduino Nano microcontroller and is extremely sensitive. This device can also be called an EMF meter, as it can measure the relative strength of a field using a scale of 10 LEDs. I modified the great code of Aaron ALAI's EMF detector project and Makezine magazine, so that instead of in line mode, the EMF strength is represented by a dot LED mode (only one LED is active at a time) reducing interferences, while we can also lower the reaction threshold in code. I also added an audible signal whose frequency changes depending on the field strength.
The device is relatively simple to build and contains only a few components:
Arduino nano microcontroller which is housed in this metal box
10 Leds
2 potentiometers
Buzzer
Switches
and several resistors
In the first version I mounted the Arduino in the same box along with the LEDs, potentiometers, and other electronics, but the instrument worked very unstable and was subject to self-oscillation. After some testing, I mounted the Arduino in a metal box that is grounded to the negative pole of the battery which greatly increases the stability and sensitivity. The detector also has an ULTRA MOD switch, and when it is turned on the sensitivity increases even more. Let me just emphasize that for work in this mode the device should be located in a room where there are no electrical appliances or installations at a distance of several meters from the detector.
And now a few words about the antenna:
In general, the shape and size of the antenna is best determined experimentally, so I left a place where a custom antenna can be connected. After a short test I created my antenna as the best in terms of sensitivity and compactness. In my case, it is a weak aluminum plate with dimensions of 7 by 3 centimeters. After a short test I created my antenna as the best in terms of sensitivity and compactness. In my case, it is a weak aluminum plate with dimensions of 7 by 3 centimeters.
This device can also be used as a lightning detector and in that case gives the best results with a wire with a length of fifty centimeters as an antenna. Finally, the device is built into a suitable box made of PVC with a thickness of 3 mm and coated with self-adhesive colored wallpaper.
Detailed instructions, schematic diagram and Arduino code at:
www.hackster.i...
If you are interested in this area, see the Playlist with all my EMF detectors at:
• EMF Detectors
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by mircemk
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