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(yuan)理電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)如附(fu)。變壓(ya)器(qi)(qi)(qi)(qi)了(le)(le)(le)，41為(wei)(wei)整機提(ti)供工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)；時基電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)555組(zu)成(cheng)限壓(ya)控(kong)制電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)和！組(zu)成(cheng)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)極(ji)(ji)(ji)(ji)性檢(jian)測電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)了(le)(le)(le)2102把等組(zu)成(cheng)簡(jian)易可調(diao)恒流(liu)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中兒01的(de)(de)正極(ji)(ji)(ji)(ji)接555控(kong)制端第(di)，腳(jiao)(jiao)，將555內比較器(qi)(qi)(qi)(qi)閾值(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)設定(ding)為(wei)(wei)2V左右即(ji)發(fa)(fa)(fa)光(guang)管(guan)的(de)(de)i下向(xiang)(xiang)(xiang)壓(ya)降，同時還起到電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)指的(de)(de)作(zuo)(zuo)印；12起。行趕電(dian)(dian)(dian)(dian)(dian)(dian)(dian)指與(yu)穩定(ding)，了(le)(le)(le)2發(fa)(fa)(fa)射(she)結(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)雙(shuang)屯作(zuo)(zuo)出。，4分壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)和52組(zu)成(cheng)限壓(ya)切換電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，分別為(wei)(wei)34.5和6檔，53用(yong)于充(chong)屯極(ji)(ji)(ji)(ji)性的(de)(de)轉換。其工(gong)作(zuo)(zuo)過程(cheng)如下打開電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)，關5電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)得屯工(gong)作(zuo)(zuo)兒01發(fa)(fa)(fa)光(guang)指。加(jia)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)初始，因02兩端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)還沒(mei)有(you)(you)改(gai)變，555因第(di)②腳(jiao)(jiao)為(wei)(wei)低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)平rfD置位(wei)，第(di)③腳(jiao)(jiao)輸(shu)出l，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)乎，第(di)腳(jiao)(jiao)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)端內部極(ji)(ji)(ji)(ji)管(guan)截(jie)(jie)止。1.在(zai)不(bu)連(lian)接電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)(qi)時，因無基極(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)而截(jie)(jie)止，172截(jie)(jie)止，02不(bu)發(fa)(fa)(fa)光(guang)，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)(qi)對外無輸(shu)出。2.當充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)(qi)插入(ru)裝有(you)(you)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)(qi)插座(zuo)時，若電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)極(ji)(ji)(ji)(ji)性正確即(ji)4點為(wei)(wei)正點為(wei)(wei)負，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)殘存(cun)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)通(tong)過539加(jia)到7的(de)(de)發(fa)(fa)(fa)射(she)結(jie)，使導通(tong)了(le)(le)(le)2進入(ru)工(gong)作(zuo)(zuo)狀態，集電(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)路(lu)(lu)(lu)通(tong)過用(yong)萬(wan)用(yong)檢(jian)測電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)測量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)的(de)(de)容(rong)(rong)(rong)量(liang)庫選擇(ze)適幸(xing)的(de)(de)歐姆檔盧(lu)般來說，47，1以(yi)(yi)上(shang)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)選擇(ze)父檔，47從，以(yi)(yi)上(shang)65選擇(ze)，檔，10以(yi)(yi)上(shang)的(de)(de)選擇(ze)8父比檔，容(rong)(rong)(rong)量(liang)為(wei)(wei)47卿以(yi)(yi)上(shang)的(de)(de)選擇(ze)尺，讓(rang)測纛(dao)時，頭指針(zhen)應(ying)立即(ji)向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻為(wei)(wei)零(ling)的(de)(de)方(fang)向(xiang)(xiang)(xiang)擺動(dong)(dong)，然后器(qi)(qi)(qi)(qi)，則(ze)(ze)針(zhen)又向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)為(wei)(wei)零(ling)如方(fang)向(xiang)(xiang)(xiang)，島并且(qie)幅度大，被，回到，這(zhe)就是電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)的(de)(de)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)與(yu)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)過程(cheng)在(zai)測量(liang)過程(cheng)中，隸針(zhen)向(xiang)(xiang)(xiang)零(ling)方(fang)向(xiang)(xiang)(xiang)擺動(dong)(dong)的(de)(de)幅度愈大明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)量(liang)愈大，反(fan)之則(ze)(ze)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)量(liang)愈小。利用(yong)這(zhe)個(ge)原(yuan)理可以(yi)(yi)粗測電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)是否有(you)(you)容(rong)(rong)(rong)量(liang)，并可以(yi)(yi)比較兩只電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)容(rong)(rong)(rong)量(liang)的(de)(de)大小，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)(qi)(qi)(qi)漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)與(yu)擊(ji)穿的(de)(de)測量(liang)。

　　將(jiang)萬用(yong)(yong)打至8父(fu)檔測量電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)用(yong)(yong)父(fu)讓檔，測倨時可(ke)以看到(dao)針右偏定角度后，然后漸(jian)漸(jian)向左(zuo)偏轉(zhuan)，直至靠(kao)進阻(zu)值(zhi)(zhi)刻度為處(chu)但不(bu)(bu)會達(da)到(dao)處(chu)實(shi)驗證明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)的(de)(de)絕(jue)緣(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)般應在(zai)幾百千歐以上，其(qi)它電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)的(de)(de)絕(jue)緣(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)在(zai)幾十兆歐以土對(dui)(dui)于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)，萬用(yong)(yong)的(de)(de)黑(hei)筆應接其(qi)正(zheng)極，若絕(jue)緣(yuan)且(qie)小(xiao)于上述值(zhi)(zhi)，則明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)絕(jue)緣(yuan)電(dian)(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)(dian)愈嚴重(zhong)；絕(jue)緣(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)為零(ling)，說明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)己擊穿短路。，33插座等(deng)(deng)對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，另路則通過；9為提供基(ji)極電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流，使(shi)丁(ding)1維持導(dao)通，02發光(guang)，指(zhi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)正(zheng)在(zai)進行。3.芻電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)充(chong)(chong)到(dao)定值(zhi)(zhi)或(huo)因(yin)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)接觸不(bu)(bu)良，使(shi)點電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)升高，經耵4分壓(ya)使(shi)555第(di)(di)(di)，腳電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位大(da)于第(di)(di)(di)，腳屯(tun)位82時，555置(zhi)零(ling)，第(di)(di)(di)腳內部放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)管導(dao)通輸(shu)(shu)(shu)出(chu)低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)1了(le)2截(jie)止(zhi)，迅速(su)切(qie)斷充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，路此02熄滅，從而對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)起到(dao)了(le)保護作用(yong)(yong)。4.今家用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)極性不(bu)(bu)正(zheng)確，即點對(dui)(dui)8點地為負時，了(le)1了(le)2亦截(jie)止(zhi)，從而防止(zhi)了(le)對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)的(de)(de)反向充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和(he)對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)路中，5的(de)(de)作用(yong)(yong)是當(dang)555第(di)(di)(di)腳輸(shu)(shu)(shu)出(chu)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)時，通過05對(dui)(dui)，2迅速(su)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，使(shi)555第(di)(di)(di)腳及時上升為高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)，當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)有接觸不(bu)(bu)良情況(kuang)，使(shi)第(di)(di)(di)腳電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位大(da)子(zi)第(di)(di)(di)，腳電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位，555迅速(su)輸(shu)(shu)(shu)出(chu)低屯(tun)平(ping)，及時切(qie)斷充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)回路5的(de)(de)作用(yong)(yong)是當(dang)囚(qiu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)接觸不(bu)(bu)等(deng)(deng)原因(yin)致使(shi)555置(zhi)零(ling)時，其(qi)第(di)(di)(di)，腳為低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)，02通過5放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，直至第(di)(di)(di)腳電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)小(xiao)于或(huo)等(deng)(deng)于第(di)(di)(di)腳電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)的(de)(de)12，555第(di)(di)(di)腳又輸(shu)(shu)(shu)出(chu)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)，如果此時屯(tun)池(chi)(chi)(chi)接觸不(bu)(bu)15問(wen)已解決，則充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)又動進入(ru)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀態。

　　元(yuan)件選(xuan)擇選(xuan)覬555時基電(dian)路；7選(xuan)次級電(dian)壓(ya)為6卯的(de)31變壓(ya)器52用(yong)單(dan)刀擲開(kai)關(guan)(guan)，53用(yong)雙刀雙擲開(kai)關(guan)(guan)；了1選(xuan)3彡(shan)100 8550等，充電(dian)器輸出插(cha)頭(tou)義選(xuan)用(yong)十(shi)字型(xing)(xing)電(dian)源插(cha)頭(tou)其它元(yuan)件如附調試(shi)與使用(yong)電(dian)路裝好后，只需將萬用(yong)置電(dian)流檔后串接于充電(dian)回路，視電(dian)池類(lei)型(xing)(xing)微調RP，將充電(dian)電(dian)流調整到規定值即可。