In this article, the creation of a Tesla miniature coil on a single transistor or the so-called Brovin kacher will be considered. The bottom line is that in the Tesla coil, an alternating high-frequency voltage is supplied to the primary winding, and as Brovin, the primary winding of the coil feeds the collector current of the transistor. Vladimir Ilyich Brovin found out that it is precisely with such a generator circuit that a high voltage will appear on the collector, and, on this basis, he got a new way to control the transistor. Therefore, the device is called "Kacher" Brovin (by the name of the author and from the abbreviation of the name rocker reactivity).
This device is a generator of high frequency and high voltage, so that it is possible to see the corona discharge. In addition, a sufficiently strong electromagnetic field arises around the operating Kacher, which can affect the operation electronic equipment, lighting lamps and the like. Initially, Tesla planned to use such devices for wireless transmission of energy over long distances, but either he faced problems of efficiency, payback, insufficient financing, or some other unknown reasons, but at the moment such devices are widely used only as a teaching tool or toy .
Materials:
0.01mm thick wire
wire with a cross section of 2-4 mm
-transistor
dvd disk
-glue
discharge lamp
-radiator
-trumpet
Description of the creation of the device.
After we figured out what kind of device it was and for what purpose it was collected by the author, I propose to consider the circuit of this device, which is located below.
As you can see, the scheme of Kacher’s device is quite simple, the author took only 10-15 minutes to solder such a scheme. But he decided to modernize it a bit. So, for example, instead of the inductor, a 12 V DC source is also installed, as well as an electrolytic capacitor, the capacitance of which must be at least 1000 Mkf, and the larger it is, the better.
In order to avoid overheating of the transistor, it is best to place it on a radiator through which excess heat will be given out. Accordingly, the larger the radiator, the more efficient the cooling.
The most routine and probably the most difficult part of the job is to wind the L2 coil. It is best to wind the coil as thin as possible, approximately 0.01 mm or slightly thicker.
The thinner the wire used to wind the coil, the more efficient the device will be. It is necessary to wind the wire on a plastic cylinder, the author used a housing from a marker. In this process, accuracy and accuracy are very important. The winding of the wire should occur tightly round to round in one layer. If you did not notice any holes in the winding, you will have to rewind the coil again, well, or you can try to smear the gap with glue.
Next, the marker with the winding should be mounted on a rack. As a rack, the author used a regular DVD-ROM. After the marker has been glued and fixed on an improvised stand, you can begin to create the primary winding. The winding L1 should be made of a very large cross-section wire, about 2-4 mm. Moreover, five turns made by such a wire will be quite enough. For the convenience of winding, the author recommends taking a pipe with a diameter of 2-2.5 times the diameter of the marker.
In order for the lower tap from the marker going to the transistor to not touch the secondary winding in any way, it is better to put it under the disk.
If everything is done correctly and without errors, then the circuit will function immediately without any additional modifications. It is best to check the operation of the device with a fluorescent lamp, if the device is connected correctly, it will glow, falling within the range of the device. If nothing happens, then the author advises you to check if the thick wire of the marker is touching, and perhaps it is worth swapping the ends of the winding L1.
As already mentioned, a correctly assembled device circuit will allow you to observe the glow of discharge lamps in the field of action. Conventional incandescent lamps will also demonstrate an interesting effect of the so-called glow discharge, similar to a plasma ball. As a result, for a couple of hundred rubles you can get a very effective and beautiful toy, for a very small cost. All used parts can be found at home and bought in stores in the city. The author assures that no more than 200 rubles were spent on everything.
It is worth recalling that despite its small size, the kacher has a strong electromagnetic field, and, therefore, is able to have a negative effect on the human body with prolonged interaction. Therefore, in order to avoid the appearance of headaches or aching pain in the muscles, you should not spend too much time working with the kacher.
A strong electromagnetic field can affect the nervous system, and discharges due to their high frequency can leave a burn (although you may not feel pain).
THEREFORE, IT IS VERY IMPORTANT TO OBSERVE THE SAFETY PRECAUTIONS WHEN WORKING WITH THIS DEVICE.