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!