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I use a capacitor, trasistor, diodes, resistors to make electric circuits, and each component has the function of each. and I use a 9 volt battery that serves to turn on my instrument when the power goes out. and I use stup up transformer that serves as raising the voltage that is useful to kill mosquitoes. and I use a UV lamp (ultra violet) that serves to invite mosquitoes go into my tool, because studies have shown that mosquitoes are very interested in the lighting / ultra violet rays.
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