Mosquito Swatter Bat and Circuit Diagram

Mosquito Swatter Bat and Circuit Diagram

It is an electronic device that produces high voltage around 300-400 volts in the nets. When the mosquito passes through the outer and inner nets of the swatter, its wings short out and sparks which will destroy it. The mosquito swatter circuit consists of three sections.

1. AC to DC converter
AC is directly step-down using the AC capacitor and rectified through full wave Diode Bridge. A low value smoothing capacitor is also present. This DC is used for charging the battery in rechargeable types. But in non rechargeable types, AC-DC conversion is not present.

2. Oscillator
A transistor based oscillator is present to generate pulses. The transistor switches on and off rapidly to create a rising and falling voltage for the transformer to step up.

3. A step-up Transformer to generate high voltage AC by inverting the DC to AC.

4. Net or Grid – The high voltage low current pulses passes into the net. The grid set up has three nets. Two outer nets are negative and the middle one is positive.

When the mosquito swatter is switched on, and gently swings, the electric field from the net attracts the mosquitoes and they try to move though the net which gives a fatal shock.
Mosquito Swatter Bat Circuit
Mosquito Swatter Bat Circuit

Probable reasons for Failure:


1. Battery failure
In rechargeable type swatter, the battery should be properly charged. It is a 3 volt battery which discharges deeply if the unit is used for 10-20 minutes continuously. So after the use, it should be plugged in for charging. In non rechargeable types, frequent battery replacement is necessary. 

2. Shorting the Grid
Grid shorting is another important cause of failure. During the use, the grid may mechanically vibrate and hit on furniture and walls. The nets are very delicate and if they make contact each other, shorting occur which destroys the internal circuit.

3. Solder point break
The output from step-up transformer is connected to the grids using wires. These wires are soldered to the grid. When the mechanical vibration is too strong, the solder points may detach.

4. Contact with water
If water is spilled on the net, dry it immediately in sunlight. Do not try to push cloths into the net to wipe water. It will destroy the net.

5. Charging
Take care while charging the Swatter. If the inbuilt plug is loose in the socket, there chance for sparking which can destroy the internal circuit. If the plug is loose, the swatter may fall from the wall mounted socket. So if the pin is not fitting in the socket firmly, try to charge in an extension cord with the swatter placed in the horizontal plane.

    ♦ Do not introduce any metal tools like screw driver into the net. It will destroys the net through shorting and also give a shock (mild but can burn) to you. Do not touch the net when the switch is pressed. 

    ♦ Do not give the swatter to children. They will play badminton considering mosquito as ball. During the play, there is definite chance for a hit- not on the mosquito but on the wall or furniture. This can damage the swatter permanently.

5 comments:

  1. Sir please give me components and its value discription.what is values of components and how many volt of transformer. Please sir give your answer it's an urgent.

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