The electric mosquito swatter is a mosquito killing tool. Now people may use it less, but in the past few years when mosquito lamps were not popular, the electric mosquito swatter was the main contributor to mosquito killing at home. The electric mosquito swatter looks like a tennis racket, but it can actually release very high voltage instantly to kill mosquitoes, so you must be careful when using it. So what is the working principle of the electric mosquito swatter? Next, let me introduce it to you! The electric mosquito swatter circuit is mainly composed of three parts: high-frequency oscillation circuit, three-fold voltage rectification circuit and high-voltage electric shock network DW. When the power switch SB is pressed, the high-frequency oscillator composed of transistor VT and transformer T is powered on, converting 3V DC into high-frequency AC of about 18kHz, which rises to about 800V (discharge distance estimation) through t, and rises to about 2500V through diodes VD2~VD4 and capacitors C1~C3. When mosquitoes and flies touch the high-voltage power grid, the insect body causes the power grid to short-circuit, that is, they will be killed or stunned or killed by current and electric arc. In the circuit, the light-emitting diode VD1 and the current-limiting resistor R1 form an indicator circuit to indicate the switch state of the circuit and the consumption of battery power. The transistor VT uses a 2N5609 silicon NPN medium-power transistor, which can also be replaced by common transistors such as 8050 and 9013. VD1 uses a φ3mm red light-emitting diode, and VD2~VD4 use 1N4007 silicon rectifier diodes. R1~R3 ​​all use metal film resistors. C1~C3 all use high-voltage capacitors (greater than 2kv), and SB uses a 6mm×6mm vertical micro touch switch. G is made of two No. 5 dry batteries connected in series (with a plastic battery rack), with a voltage of 3V. The high-frequency transformer T must be homemade: use EE19 type ferrite core and matching plastic skeleton (six feet), L1 is wound with φ0.22mm enameled wire for 22 turns, L2 is wound with the same wire for 8 turns, and L3 is wound with φ0.07mm enameled wire for about 2000 turns. Pay attention to the black dot wire ends, wind them in order from head to tail, and wrap 1~2 turns of high-voltage insulating tape between the windings. The above is the working principle of the electric mosquito swatter. I hope it will be helpful to everyone! If you want to know more about the electric mosquito swatter, you can pay more attention to our website! If you need to buy electronic products such as electric mosquito swatters, electronic pianos, anti-wolf devices, etc., you can contact us directly!

The electronic keyboard itself stores more than 100 rhythmic sounds of different musical styles. Rhythmic patterns with classical style and modern flavor can express the rhythmic characteristics of foreign music, as well as the rhythmic characteristics of our nation, with rich effects, pleasant sound, and simple use. Unlike the piano, the electronic keyboard has more forms of expression, but the timbre is not as crisp and elegant as the piano. Let me introduce to you the basic characteristics of the electronic keyboard! The electronic keyboard has the function of timbre change and superposition, and can play hundreds and thousands of timbres. These timbres include the timbres of various musical instruments, human chorus, various sound effects of nature such as animals, machines, thunderstorms, guns, cars and ships, as well as our daily lives, and various sound effects that are beyond the scope of nature and have a dreamy color and reflect the rich imagination of human beings. The single or several timbre expression capabilities of traditional musical instruments are very weak and limited in comparison. The timbre superposition function of the electronic keyboard can play four different timbres at the same time, which can conveniently demonstrate the combination of different instruments in instrumental works. The electronic keyboard has the function of active chords. We know that melody is a primary form of expression of musical images and musical emotions in musical works. In tonal music, the setting and setting of the main melody are mainly achieved through the use of chords. And harmony is the progression and use of chords. When we listen to a magnificent chorus or symphony, we are often shaken by the rich and full sound. We can't help but ask: so many parts are interlaced, so many instruments sound together, what force makes them harmoniously combined? This is where harmony plays an important role. The active chord function of the electronic keyboard has almost all the chords that need to be used in musical works. Because its playing skills are simple and easy to learn, you can also easily play different harmony effects with various musical branches and music rhythms you need. The electronic keyboard has the function of sequence and recording. Polyphonic music is polyphonic music. Learning polyphonic music is very helpful for understanding and appreciating musical works. Because polyphonic music has a complex structure, it takes time and effort to use traditional instruments, and the effect is not ideal, and it is relatively difficult. The sequence function of the electronic keyboard can simplify the performance techniques, and the complex polyphonic music can be recorded one by one. It reduces the difficulty of performance, and at the same time arranges the polyphonic music with three-dimensional structural characteristics in order from simple to complex, so that we can understand, recognize and learn polyphonic music works step by step, and can also further improve the ability to appreciate and understand music. The recording function of the electronic keyboard can store the content performed on the electronic keyboard on the disk every time, and keep it as a material or communicate with others. At the same time, it is also a very convenient karaoke machine. The content required for the performance can be recorded on the disk in advance, and it can be played and used by turning on the power switch of the electronic keyboard. And it can be transposed, changed in timbre, changed in rhythm, changed in speed, etc. according to different needs at any time, without having to play the instrument yourself. The electronic keyboard has MIDI function. The rapid development of modern science and technology has brought about infinite changes in human material life and spiritual life. In the field of music, people are no longer satisfied with the performance of music by traditional instruments, and high technology has inevitably occupied the hall of music. Electronic music and computer music have widely influenced people's music activities. Movies, television, streets, shops and schools make us feel its existence and influence everywhere. Although computer music will not become the mainstream of music in the future, its position in the entire history of human music has been established, and it has influenced people's understanding and interpretation of music to a certain extent. Understanding it and mastering it has become a matter that cannot be ignored in the field of music. Our music activities must pay attention to this reality. We must expand our musical knowledge so that we can keep up with the pace of the times. MIDI is one of the most important contents in the electronic music industry. The electronic instruments we are currently using (such as electric piano, electric guitar, electronic synthesizer, electronic keyboard, etc.) have MIDI functions. Moreover, in the field of music, it is becoming a trend to transform traditional instruments into electronic instruments (such as electronic violin, electronic accordion, electronic erhu, electronic dulcimer, etc.) to expand the scope of music performance. MIDI is a digital interface, a technical specification and compatibility specification for different types of electronic instruments to exchange data with each other. It allows one person to easily play multiple electronic instruments together, producing music with great charm and rich sound. It allows music to express talents and understand talents to the maximum extent. The above is an introduction to the basic characteristics of the electronic keyboard. I hope it will be helpful to everyone! If you want to know more about the electronic keyboard, you can pay more attention to our website! If you need to buy electronic products such as electric mosquito swatters, electronic keyboards, and wolf alarms, you can contact us directly!