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2N3904 Transistor |
x 2 | |
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1N914onsemi
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x 6 | |
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Lightning detection Antenna |
x 1 | |
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Resistors, capacitors |
x 1 |
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Soldering Iron Kit |
Advanced Sensitive Lightning detector with PC Graph
Lightning detectors are devices designed to detect the presence of lightning strikes. These detectors utilize various technologies to sense the electromagnetic signals like detecting of Radio Frequency (RF), Electric Field Change, Magnetic Field, Optical Detectors, as well as combined Systems. In several of my previous videos, I described ways of making such detectors made with discrete elements, integrated circuits, and microcontrollers.
This time I will describe to you how to make a very simple lightning detector, which with the help of a personal computer with a sound card, and simple software turns into a serious instrument for monitoring and predicting weather disasters.
The range of this device, depending on the strength of the strike, and the length of the antenna ranges up to 100 km.
On the PC software, we get information about the number of thunderstorms, as well as their intensity in the form of a graphic display for the last ten minutes. If the amplitudes and frequency of shocks increase over time, it is almost a sure sign that a storm is approaching.
If you want to make a PCB for this project, or for any other electronic project, PCBway is a great choice for you. PCBway is one of the most experienced PCB manufacturing company in China in field of PCB prototype and fabrication. They provide completed PCB assembly service with worldwide free shipping , and ISO9001 quality control system. Also, on their site there is an online gerber viewer where you can upload your gerber and drill files to render your board.
As I mentioned before, the device is very simple to build and consists of the following components:
- Two NPN transistors
- 6 diodes 1n4148
- several resistors and capacitors
- detecting coil (180 turns on a ferrite core with a diameter of 1cm and a length of 10cm)
- and a rod antenna from an old pocket radio
Now let's see how the device works in real conditions:
First, we need to connect the output from the metal detector to the microphone input from the Sound Card, and then start the software.
As for the "SignalMeasure" application, it was downloaded from the G4JNT site and is actually an audio amplitude signal monitor. The electronic circuit transforms the thunder into an audio signal, and then this signal is monitored on the PC Application. On the application we can set the sampling frequency, and if it is set to 1Sec, the graph shows us the events of the last 8 minutes.
First we will test the device with an electric lighter.
This device is sensitive to magnetic field. To test this feature I am going to use this PEMF device wich is actually a variable magnetic field generator
The device is also sensitive to electrostatic charge. As a source of electrostatic charge I use insect killer.
And now comes the most interesting part, to "catch" lightning in real time, and see how it looks visually on the graph. I live in Ohrid, a small town in Macedonia, and during the initial tests of the device when the development was at a very early stage, there was a relatively strong storm with electrical discharges in my area, and the graphic display of that storm was beautiful, with frequent peaks with large amplitudes. Unfortunately, I don't have any recordings from this period. In the continuation of the video, I will present you some later recordings of thunderstorms that are relatively far from my region, but still you can see the functionality of this device relatively well.
If I have "favorable conditions" during the time I upload the video, I will make new recordings with which I will update this section
And finally, a short conclusion:
This is really a very simple electronic device, it does not represent any innovation and I have made such and similar devices many times before. However, the idea to present the lightnings visually in time with the help of a PC sound card is new. With the help of very basic software, which is actually a sound recorder, we turn this device into a powerful tool for monitoring and forecasting storms that has a very significant practical application, especially in this particular period of global warming.
My next project in this area will be to add an Arduino A/D converter to this device and with special PC software to continuously monitor electrical discharges in the environment 24/7
Advanced Sensitive Lightning detector with PC Graph
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