How to Repair mosquito bat

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First open the mosquito bat by using the use of screwdriver, Inside bat we will locate simple electricity digital circuit, consisting of battery, Transistor, resistors, capacitors , diodes and small transformer.The simple characteristic of this circuit is to generate very excessive voltage across output and electric fence so mosquito will die right now whilst it came in contact with fence.

We need a digital Multimeter to test the diverse electronic components.
Caution: Never maintain Multimeter probes without delay on the electric fence, it could result in damage to Multimeter and even we may face some surprise.

First Remove the battery and take a look at the battery cautiously, check voltage of battery, if it’s miles a 3 V(DC) battery, while you check with Multimeter it have to display equal rated voltage( in completely charged condition), if it shows 0 or low fee then battery is broken.

After putting off battery, now test the digital additives, for trying out electronic additives keep the Multimter in continuity mode, You will listen a buzzer sound whilst you one probe is touched with different. In continuity mode of Multimeter we can find quick Circuits ,assume if you test a diode and in case you listen buzzer sound then diode is short circuited indicates it is broken.

Now with the help of Multimeter check all of the additives, in mosquito bat there is less hazard of failing of transformer.So first check all other additives

In mosquito bat there is more hazard of failing of transistor, so test the transistor and if it is damaged replace it.
How to test the transistor-
It is better to check the transistor after disposing of it, So Desolder the transistor from circuit board with assist of soldering rod.(Please be careful while the use of soldering rod,if you have no practice of using it better keep away from it the usage of) or use Desoldering device to remove it cautiously.

For NPN transistor Keep one probe(Red) on Base and different(Black) on emitter, Multimeter have to imply some resistance fee, while we reverse the probe(Red probe on emitter and Black on Base) it have to imply “1” Next hold probe(Red)on base and other(Black) on collector, Multimeter must indicate price and while you reverse the probe Multimeter should imply “1” .Now hold one probe in Emitter and other in Base , Multimeter have to suggest fee “1” and if you opposite the probe Multimeter need to indicate the same-: “1”.

For PNP kind transistor when probe(Red) on emitter and black on base it should suggest resistance price and when black probe on emitter and Red probe on base it need to indicate “1”.Next preserve probe(Red)on base and other(Black) on collector, Multimeter should imply “1” and whilst you opposite the probe of multimeter , Multimeter have to suggest resistance cost. Now maintain one probe in Emitter and other in Base , Multimeter need to suggest price “1” and in case you reverse the probe Multimeter must suggest the identical-: “1”.
If the transistor passes above take a look at it’s miles perfectly good.Even as checking out in case you listen a buzzer sound then transistor is damaged, you need to replace new transistor. While replacing please observe the wide variety written in transistor(Eg BC 547) and update it with equal wide variety.

From the quantity of transistor we are able to find it whether or not it’s NPN or PNP kind transistor by using checking it is facts sheet.

After testing of transistor, test the capacitor, maintain one stop of capacitor with one probe and different stop of capacitor with different probe, in continuity mode if it indicates quick circuit ( buzzer sound), capacitor is broken and we need to update the capacitor.Equal way take a look at the diode also.Replace capacitance of equal capacitance(in farad) and voltage score.In similar way test the diodes additionally.

So update the digital element which has failed and join the battery once more and close the bat.Now the mosquito bat should be operating.