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。

該圖片由注冊用戶"異想天開"提供，版權聲明反饋

電蚊拍電路工作原理

電(dian)(dian)(dian)蚊拍(pai)(pai)手(shou)柄(bing)(bing)上(shang)有(you)一(yi)個(ge)功能開(kai)關(guan)(guan)SW，SW開(kai)關(guan)(guan)共有(you)三檔，向(xiang)上(shang)推(tui)是第(di)一(yi)檔。這(zhe)(zhe)時(shi)(shi)開(kai)關(guan)(guan)接通(tong)電(dian)(dian)(dian)池(chi)BT正極，電(dian)(dian)(dian)流(liu)通(tong)過開(kai)關(guan)(guan)經(jing)LED3、電(dian)(dian)(dian)阻R5構成(cheng)(cheng)(cheng)回路(lu)，使照明(ming)燈LED3點亮(liang)，也可在此(ci)狀態(tai)下(xia)打蚊子(zi)（耗電(dian)(dian)(dian)高(gao)）；中間檔是第(di)二檔。當將SW開(kai)關(guan)(guan)放(fang)(fang)置在中間部(bu)位時(shi)(shi)，是為(wei)了給電(dian)(dian)(dian)池(chi)BT充(chong)電(dian)(dian)(dian)。當電(dian)(dian)(dian)蚊拍(pai)(pai)電(dian)(dian)(dian)池(chi)沒(mei)電(dian)(dian)(dian)時(shi)(shi)，要將手(shou)柄(bing)(bing)下(xia)端的(de)單(dan)相插頭(tou)釋放(fang)(fang)出來，插到～220V插座上(shang)，D1～D4組成(cheng)(cheng)(cheng)的(de)硅整流(liu)橋給電(dian)(dian)(dian)池(chi)BT充(chong)電(dian)(dian)(dian)，LED1被點亮(liang)（充(chong)電(dian)(dian)(dian)指(zhi)示）；將SW開(kai)關(guan)(guan)向(xiang)下(xia)拉是第(di)三檔。這(zhe)(zhe)是準備(bei)進行滅(mie)蚊工作。當按下(xia)S1微動開(kai)關(guan)(guan)時(shi)(shi)LED2被點亮(liang)（滅(mie)蚊電(dian)(dian)(dian)路(lu)工作指(zhi)示），Q1、R6、C2、R4和變(bian)(bian)壓(ya)器B的(de)初(chu)級線圈(quan)組成(cheng)(cheng)(cheng)的(de)振蕩電(dian)(dian)(dian)路(lu)開(kai)始工作，并(bing)在變(bian)(bian)壓(ya)器的(de)次級線圈(quan)感應(ying)出電(dian)(dian)(dian)壓(ya)，經(jing)D5～D8和C3～C6組成(cheng)(cheng)(cheng)的(de)倍壓(ya)整流(liu)電(dian)(dian)(dian)路(lu)，將輸出電(dian)(dian)(dian)壓(ya)迅速提升(sheng)至(zhi)1600V左右以滅(mie)殺蚊蠅(ying)（新(xin)拍(pai)(pai)應(ying)達到1800V以上(shang)）。