收音機單放機等小家電常采用鎳鎘電池供電，常規的充電方法趕從家用電器取出電池，放入專用充電電器充電。充足電后再裝入電器使用。這樣取出裝入極不方便。如果在充電器輸出端焊接插頭，通過電器的電源插座對電池直接充電，5可避免電池取出裝入的麻煩。但由了充電器常根據鎳鎘電池的性能設計為恒流充電，電器內部電池接觸不良，如果不，打開了電器，關，當電器工作電流小于充電電流時，會使加在電路兩端作了這款限壓保護型充電器。

　　工(gong)作原理電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路如(ru)附。變壓(ya)器(qi)(qi)(qi)了(le)，41為(wei)(wei)整(zheng)機(ji)提(ti)供工(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)；時(shi)基(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路555組成(cheng)(cheng)限(xian)壓(ya)控(kong)制電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路和(he)！組成(cheng)(cheng)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池極(ji)性檢測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路了(le)2102把等組成(cheng)(cheng)簡易可調恒(heng)流充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路中(zhong)兒01的(de)(de)(de)(de)正(zheng)極(ji)接(jie)555控(kong)制端第，腳，將555內比較器(qi)(qi)(qi)閾值電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)設定(ding)為(wei)(wei)2V左右即發(fa)光管的(de)(de)(de)(de)i下向壓(ya)降，同(tong)時(shi)還起到(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)指的(de)(de)(de)(de)作印；12起。行趕電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)指與(yu)穩定(ding)，了(le)2發(fa)射(she)結電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)雙屯(tun)作出(chu)。，4分壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路和(he)52組成(cheng)(cheng)限(xian)壓(ya)切換電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路，分別為(wei)(wei)34.5和(he)6檔(dang)(dang)(dang)，53用(yong)(yong)于充(chong)(chong)屯(tun)極(ji)性的(de)(de)(de)(de)轉換。其工(gong)作過(guo)程(cheng)如(ru)下打開電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，關(guan)5電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路得屯(tun)工(gong)作兒01發(fa)光指。加電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)初始，因02兩端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)還沒有改變，555因第②腳為(wei)(wei)低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)rfD置(zhi)位，第③腳輸(shu)出(chu)l，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)乎，第腳放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)端內部極(ji)管截(jie)止(zhi)。1.在(zai)不(bu)(bu)連接(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)時(shi)，因無基(ji)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流而截(jie)止(zhi)，172截(jie)止(zhi)，02不(bu)(bu)發(fa)光，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)對(dui)外無輸(shu)出(chu)。2.當充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)插(cha)入(ru)裝有電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)插(cha)座時(shi)，若電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池極(ji)性正(zheng)確即4點為(wei)(wei)正(zheng)點為(wei)(wei)負(fu)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池殘存電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)通過(guo)539加到(dao)7的(de)(de)(de)(de)發(fa)射(she)結，使導通了(le)2進入(ru)工(gong)作狀態，集電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流路通過(guo)用(yong)(yong)萬用(yong)(yong)檢測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)測(ce)(ce)量(liang)(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)的(de)(de)(de)(de)容(rong)(rong)(rong)(rong)(rong)量(liang)(liang)庫選(xuan)(xuan)擇適幸的(de)(de)(de)(de)歐姆檔(dang)(dang)(dang)盧(lu)般來(lai)說，47，1以(yi)(yi)上(shang)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)選(xuan)(xuan)擇父檔(dang)(dang)(dang)，47從，以(yi)(yi)上(shang)65選(xuan)(xuan)擇，檔(dang)(dang)(dang)，10以(yi)(yi)上(shang)的(de)(de)(de)(de)選(xuan)(xuan)擇8父比檔(dang)(dang)(dang)，容(rong)(rong)(rong)(rong)(rong)量(liang)(liang)為(wei)(wei)47卿以(yi)(yi)上(shang)的(de)(de)(de)(de)選(xuan)(xuan)擇尺，讓(rang)測(ce)(ce)纛(dao)時(shi)，頭指針(zhen)(zhen)應立即向電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻為(wei)(wei)零的(de)(de)(de)(de)方向擺(bai)動，然(ran)后器(qi)(qi)(qi)，則(ze)針(zhen)(zhen)又向電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)為(wei)(wei)零如(ru)方向，島并且幅(fu)度大，被，回到(dao)，這(zhe)就是電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)的(de)(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)與(yu)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)過(guo)程(cheng)在(zai)測(ce)(ce)量(liang)(liang)過(guo)程(cheng)中(zhong)，隸針(zhen)(zhen)向零方向擺(bai)動的(de)(de)(de)(de)幅(fu)度愈大明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)量(liang)(liang)愈大，反之則(ze)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)量(liang)(liang)愈小。利用(yong)(yong)這(zhe)個原理可以(yi)(yi)粗(cu)測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)是否有容(rong)(rong)(rong)(rong)(rong)量(liang)(liang)，并可以(yi)(yi)比較兩只電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)容(rong)(rong)(rong)(rong)(rong)量(liang)(liang)的(de)(de)(de)(de)大小，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)與(yu)擊穿的(de)(de)(de)(de)測(ce)(ce)量(liang)(liang)。

　　將(jiang)萬用打至(zhi)8父(fu)檔測量電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)用父(fu)讓(rang)檔，測倨時(shi)可以看到(dao)針右偏定(ding)角度后(hou)(hou)，然后(hou)(hou)漸漸向左偏轉，直至(zhi)靠進阻(zu)值(zhi)(zhi)刻(ke)度為(wei)處但不會達到(dao)處實驗證(zheng)明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)的絕(jue)緣電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)般應在幾百千歐(ou)以上，其(qi)它電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)的絕(jue)緣電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)在幾十兆歐(ou)以土對(dui)于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)，萬用的黑筆應接(jie)其(qi)正(zheng)極，若(ruo)絕(jue)緣且小(xiao)于上述(shu)值(zhi)(zhi)，則(ze)(ze)明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)絕(jue)緣電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)愈小(xiao)，漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)愈嚴重；絕(jue)緣電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)為(wei)零，說明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)己擊(ji)穿短路(lu)(lu)。，33插座等(deng)對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，另路(lu)(lu)則(ze)(ze)通(tong)過；9為(wei)提供基極電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流，使(shi)丁1維持導通(tong)，02發光，指充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)正(zheng)在進行。3.芻(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)充(chong)(chong)到(dao)定(ding)值(zhi)(zhi)或因電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)接(jie)觸(chu)不良(liang)，使(shi)點電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)升高(gao)(gao)，經耵4分(fen)壓(ya)使(shi)555第(di)(di)(di)(di)，腳(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)大于第(di)(di)(di)(di)，腳(jiao)(jiao)屯(tun)位(wei)82時(shi)，555置(zhi)零，第(di)(di)(di)(di)腳(jiao)(jiao)內部(bu)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)管(guan)導通(tong)輸出低(di)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)1了2截(jie)(jie)止，迅速切(qie)斷(duan)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，路(lu)(lu)此02熄滅，從(cong)而(er)對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)起(qi)到(dao)了保護作用。4.今家用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)極性(xing)不正(zheng)確，即點對(dui)8點地為(wei)負時(shi)，了1了2亦截(jie)(jie)止，從(cong)而(er)防止了對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的反(fan)向充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)路(lu)(lu)中(zhong)，5的作用是(shi)(shi)當(dang)555第(di)(di)(di)(di)腳(jiao)(jiao)輸出高(gao)(gao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)時(shi)，通(tong)過05對(dui)，2迅速充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，使(shi)555第(di)(di)(di)(di)腳(jiao)(jiao)及(ji)時(shi)上升為(wei)高(gao)(gao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)，當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)有接(jie)觸(chu)不良(liang)情況，使(shi)第(di)(di)(di)(di)腳(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)大子(zi)第(di)(di)(di)(di)，腳(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)，555迅速輸出低(di)屯(tun)平(ping)，及(ji)時(shi)切(qie)斷(duan)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)回路(lu)(lu)5的作用是(shi)(shi)當(dang)囚電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)接(jie)觸(chu)不等(deng)原因致使(shi)555置(zhi)零時(shi)，其(qi)第(di)(di)(di)(di)，腳(jiao)(jiao)為(wei)低(di)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)，02通(tong)過5放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，直至(zhi)第(di)(di)(di)(di)腳(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)小(xiao)于或等(deng)于第(di)(di)(di)(di)腳(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)的12，555第(di)(di)(di)(di)腳(jiao)(jiao)又(you)輸出高(gao)(gao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)，如果此時(shi)屯(tun)池(chi)(chi)接(jie)觸(chu)不15問已解(jie)決，則(ze)(ze)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)又(you)動進入充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀態。

　　元件(jian)選擇選覬555時基(ji)電(dian)路(lu)(lu)；7選次級(ji)電(dian)壓(ya)為6卯(mao)的31變壓(ya)器(qi)52用(yong)單刀(dao)擲開(kai)關，53用(yong)雙刀(dao)雙擲開(kai)關；了1選3彡100 8550等，充電(dian)器(qi)輸出插(cha)頭義選用(yong)十字型電(dian)源插(cha)頭其它元件(jian)如附調試與使用(yong)電(dian)路(lu)(lu)裝好后(hou)，只需將萬(wan)用(yong)置電(dian)流(liu)(liu)檔后(hou)串接于充電(dian)回路(lu)(lu)，視電(dian)池類型微調RP，將充電(dian)電(dian)流(liu)(liu)調整到規定值即可(ke)。