自制電蚊拍電路圖詳解

電蚊拍自制電路圖主要由高頻振蕩電路、三倍壓整流電路和高壓電擊網三部分組成。當按下電源開關SB時，由三極管VT和變壓器T構成的高頻振蕩器通電工作，把3V直流電變成18kHz左右的高頻交流電，經T升壓到約500V（L3兩端實測），再經二極管VD2～VD4、電容器C1～C3三倍壓整流升高到1500V左右，加到蚊拍的金屬網DW上。當蚊蠅觸及金屬網絲時，蟲體造成電網短路，即會被電流、電弧殺灼或擊暈、擊斃。電路中，發光二極管VD1和限流電阻器R1構成指示燈電路，用來指示電路通斷狀態及顯示電池電能的耗損情況。

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電蚊拍電路工作原理

電(dian)(dian)(dian)(dian)(dian)(dian)(dian)蚊(wen)拍手(shou)(shou)柄上有一個功(gong)能(neng)開關(guan)(guan)SW，SW開關(guan)(guan)共有三檔(dang)，向上推是(shi)(shi)第一檔(dang)。這時(shi)開關(guan)(guan)接通(tong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池BT正(zheng)極(ji)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)通(tong)過開關(guan)(guan)經(jing)LED3、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻R5構成回路，使照明燈LED3點(dian)亮，也可在此狀態下(xia)打蚊(wen)子（耗(hao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)高(gao)）；中間(jian)檔(dang)是(shi)(shi)第二檔(dang)。當將(jiang)SW開關(guan)(guan)放置在中間(jian)部位時(shi)，是(shi)(shi)為了給(gei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池BT充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)蚊(wen)拍電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池沒電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)，要將(jiang)手(shou)(shou)柄下(xia)端(duan)的(de)單相插(cha)頭釋放出(chu)來，插(cha)到(dao)～220V插(cha)座(zuo)上，D1～D4組(zu)成的(de)硅整流(liu)橋給(gei)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池BT充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，LED1被點(dian)亮（充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)指示(shi)）；將(jiang)SW開關(guan)(guan)向下(xia)拉是(shi)(shi)第三檔(dang)。這是(shi)(shi)準備進行滅(mie)蚊(wen)工作。當按下(xia)S1微動開關(guan)(guan)時(shi)LED2被點(dian)亮（滅(mie)蚊(wen)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路工作指示(shi)），Q1、R6、C2、R4和(he)變(bian)壓器B的(de)初級(ji)線圈(quan)組(zu)成的(de)振蕩電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路開始工作，并在變(bian)壓器的(de)次級(ji)線圈(quan)感應(ying)出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓，經(jing)D5～D8和(he)C3～C6組(zu)成的(de)倍壓整流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路，將(jiang)輸出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓迅速提升至1600V左(zuo)右以滅(mie)殺蚊(wen)蠅（新拍應(ying)達到(dao)1800V以上）。