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(zuo)(zuo)原理電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)如附。變(bian)壓(ya)(ya)器(qi)(qi)了，41為(wei)整機(ji)提供工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)；時基電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)555組成(cheng)限壓(ya)(ya)控制電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)和(he)！組成(cheng)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池極(ji)性檢測(ce)(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)了2102把等(deng)組成(cheng)簡易可(ke)調(diao)恒流充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)兒01的(de)正極(ji)接(jie)555控制端(duan)第，腳(jiao)，將555內比(bi)較器(qi)(qi)閾(yu)值電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)設定為(wei)2V左(zuo)右即發(fa)(fa)(fa)光管(guan)的(de)i下向(xiang)(xiang)(xiang)壓(ya)(ya)降，同時還起到電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)指(zhi)的(de)作(zuo)(zuo)印(yin)；12起。行趕電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)指(zhi)與(yu)穩定，了2發(fa)(fa)(fa)射結電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)雙(shuang)屯作(zuo)(zuo)出。，4分(fen)(fen)壓(ya)(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)和(he)52組成(cheng)限壓(ya)(ya)切(qie)換電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)，分(fen)(fen)別為(wei)34.5和(he)6檔(dang)(dang)，53用(yong)于充屯極(ji)性的(de)轉換。其工(gong)作(zuo)(zuo)過程(cheng)(cheng)如下打開電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)，關5電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)得屯工(gong)作(zuo)(zuo)兒01發(fa)(fa)(fa)光指(zhi)。加電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)初始，因(yin)02兩端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)還沒有(you)改變(bian)，555因(yin)第②腳(jiao)為(wei)低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)rfD置位，第③腳(jiao)輸(shu)出l，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)乎(hu)，第腳(jiao)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)端(duan)內部(bu)極(ji)管(guan)截(jie)止(zhi)(zhi)。1.在(zai)不連接(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)時，因(yin)無(wu)(wu)基極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流而截(jie)止(zhi)(zhi)，172截(jie)止(zhi)(zhi)，02不發(fa)(fa)(fa)光，充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)對外無(wu)(wu)輸(shu)出。2.當(dang)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)插入(ru)裝有(you)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)插座(zuo)時，若電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池極(ji)性正確即4點為(wei)正點為(wei)負，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池殘存電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)通過539加到7的(de)發(fa)(fa)(fa)射結，使導(dao)通了2進入(ru)工(gong)作(zuo)(zuo)狀態，集電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流路(lu)通過用(yong)萬用(yong)檢測(ce)(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)測(ce)(ce)(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)的(de)容(rong)(rong)(rong)(rong)量(liang)庫選(xuan)(xuan)擇(ze)適幸的(de)歐姆檔(dang)(dang)盧般(ban)來說，47，1以上的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)選(xuan)(xuan)擇(ze)父檔(dang)(dang)，47從，以上65選(xuan)(xuan)擇(ze)，檔(dang)(dang)，10以上的(de)選(xuan)(xuan)擇(ze)8父比(bi)檔(dang)(dang)，容(rong)(rong)(rong)(rong)量(liang)為(wei)47卿以上的(de)選(xuan)(xuan)擇(ze)尺，讓測(ce)(ce)(ce)纛時，頭指(zhi)針應立(li)即向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻為(wei)零(ling)的(de)方(fang)向(xiang)(xiang)(xiang)擺動，然后器(qi)(qi)，則針又向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)為(wei)零(ling)如方(fang)向(xiang)(xiang)(xiang)，島并且幅度大，被，回(hui)到，這就是電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)的(de)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)與(yu)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)過程(cheng)(cheng)在(zai)測(ce)(ce)(ce)量(liang)過程(cheng)(cheng)中(zhong)，隸針向(xiang)(xiang)(xiang)零(ling)方(fang)向(xiang)(xiang)(xiang)擺動的(de)幅度愈大明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)量(liang)愈大，反之則電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)量(liang)愈小。利用(yong)這個原理可(ke)以粗測(ce)(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)是否有(you)容(rong)(rong)(rong)(rong)量(liang)，并可(ke)以比(bi)較兩只(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)容(rong)(rong)(rong)(rong)量(liang)的(de)大小，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)器(qi)(qi)漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)與(yu)擊穿的(de)測(ce)(ce)(ce)量(liang)。

　　將萬用打至8父檔測量電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)用父讓檔，測倨(ju)時(shi)可以看到針右偏定角度(du)后(hou)，然后(hou)漸漸向(xiang)左(zuo)偏轉，直至靠進阻(zu)(zu)值(zhi)刻度(du)為(wei)處但不(bu)會達到處實(shi)驗證明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)的絕(jue)(jue)緣電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)般應在幾百千歐以上，其它電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)的絕(jue)(jue)緣電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)在幾十兆歐以土對(dui)(dui)于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)，萬用的黑筆應接(jie)其正極(ji)，若絕(jue)(jue)緣且(qie)小(xiao)于(yu)上述值(zhi)，則(ze)明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)絕(jue)(jue)緣電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)愈小(xiao)，漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)愈嚴重(zhong)；絕(jue)(jue)緣電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)為(wei)零，說明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)己擊穿(chuan)短路。，33插(cha)座(zuo)等對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，另(ling)路則(ze)通過；9為(wei)提供基極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，使(shi)(shi)丁1維持導通，02發光，指充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)正在進行。3.芻電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)充(chong)(chong)(chong)到定值(zhi)或(huo)因(yin)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)接(jie)觸不(bu)良，使(shi)(shi)點電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)升高，經耵(ding)4分壓(ya)使(shi)(shi)555第，腳(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)大(da)于(yu)第，腳(jiao)(jiao)屯位(wei)82時(shi)，555置零，第腳(jiao)(jiao)內部放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)管導通輸出低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)1了(le)2截止(zhi)，迅(xun)速(su)(su)切斷(duan)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，路此(ci)02熄(xi)滅，從而(er)對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)起到了(le)保護作(zuo)用。4.今家用電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)極(ji)性(xing)不(bu)正確，即點對(dui)(dui)8點地(di)為(wei)負時(shi)，了(le)1了(le)2亦截止(zhi)，從而(er)防止(zhi)了(le)對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的反向(xiang)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)路中，5的作(zuo)用是當555第腳(jiao)(jiao)輸出高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)時(shi)，通過05對(dui)(dui)，2迅(xun)速(su)(su)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，使(shi)(shi)555第腳(jiao)(jiao)及時(shi)上升為(wei)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)，當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)有接(jie)觸不(bu)良情況，使(shi)(shi)第腳(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)大(da)子第，腳(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)，555迅(xun)速(su)(su)輸出低屯平(ping)(ping)，及時(shi)切斷(duan)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)回路5的作(zuo)用是當囚電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)接(jie)觸不(bu)等原(yuan)因(yin)致使(shi)(shi)555置零時(shi)，其第，腳(jiao)(jiao)為(wei)低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)，02通過5放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，直至第腳(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)小(xiao)于(yu)或(huo)等于(yu)第腳(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)的12，555第腳(jiao)(jiao)又輸出高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)，如(ru)果此(ci)時(shi)屯池(chi)(chi)接(jie)觸不(bu)15問已解(jie)(jie)決(jue)，則(ze)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)又動進入(ru)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀態(tai)。

　　元件(jian)選(xuan)(xuan)擇選(xuan)(xuan)覬555時基電(dian)路(lu)(lu)；7選(xuan)(xuan)次級(ji)電(dian)壓為(wei)6卯的31變壓器(qi)52用單刀擲(zhi)開(kai)關(guan)，53用雙(shuang)刀雙(shuang)擲(zhi)開(kai)關(guan)；了1選(xuan)(xuan)3彡100 8550等，充電(dian)器(qi)輸(shu)出(chu)插頭(tou)義選(xuan)(xuan)用十字型(xing)電(dian)源插頭(tou)其它元件(jian)如附調試與使用電(dian)路(lu)(lu)裝(zhuang)好后，只(zhi)需將(jiang)萬用置電(dian)流檔后串接于(yu)充電(dian)回路(lu)(lu)，視電(dian)池類型(xing)微調RP，將(jiang)充電(dian)電(dian)流調整到規定值即可。