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(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)如(ru)附。變壓(ya)(ya)器(qi)(qi)(qi)了(le)，41為整機提供工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源；時(shi)(shi)基(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)555組(zu)(zu)(zu)成(cheng)(cheng)限(xian)壓(ya)(ya)控(kong)制電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)和(he)！組(zu)(zu)(zu)成(cheng)(cheng)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池極(ji)(ji)性檢測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)了(le)2102把等組(zu)(zu)(zu)成(cheng)(cheng)簡易可調(diao)恒流充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)中兒01的(de)(de)(de)(de)正(zheng)極(ji)(ji)接(jie)555控(kong)制端(duan)第(di)(di)(di)，腳(jiao)，將555內比(bi)(bi)較器(qi)(qi)(qi)閾值(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)設定為2V左右(you)即發光(guang)(guang)管(guan)的(de)(de)(de)(de)i下向(xiang)(xiang)(xiang)壓(ya)(ya)降，同時(shi)(shi)還起(qi)到電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源指(zhi)(zhi)(zhi)的(de)(de)(de)(de)作(zuo)(zuo)印；12起(qi)。行(xing)趕電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)指(zhi)(zhi)(zhi)與穩定，了(le)2發射結電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)雙屯(tun)(tun)作(zuo)(zuo)出。，4分壓(ya)(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)和(he)52組(zu)(zu)(zu)成(cheng)(cheng)限(xian)壓(ya)(ya)切換(huan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)，分別(bie)為34.5和(he)6檔(dang)(dang)，53用(yong)于充屯(tun)(tun)極(ji)(ji)性的(de)(de)(de)(de)轉換(huan)。其工(gong)作(zuo)(zuo)過程(cheng)如(ru)下打開電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源，關5電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)得屯(tun)(tun)工(gong)作(zuo)(zuo)兒01發光(guang)(guang)指(zhi)(zhi)(zhi)。加電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)初始(shi)，因02兩端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)還沒有(you)改(gai)變，555因第(di)(di)(di)②腳(jiao)為低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平rfD置(zhi)位(wei)，第(di)(di)(di)③腳(jiao)輸(shu)出l，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)乎，第(di)(di)(di)腳(jiao)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)端(duan)內部極(ji)(ji)管(guan)截(jie)止(zhi)。1.在不連接(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)時(shi)(shi)，因無(wu)基(ji)極(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流而截(jie)止(zhi)，172截(jie)止(zhi)，02不發光(guang)(guang)，充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)對外無(wu)輸(shu)出。2.當充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)插入(ru)裝有(you)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)插座時(shi)(shi)，若(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池極(ji)(ji)性正(zheng)確即4點(dian)為正(zheng)點(dian)為負，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池殘存(cun)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)通(tong)過539加到7的(de)(de)(de)(de)發射結，使導(dao)通(tong)了(le)2進入(ru)工(gong)作(zuo)(zuo)狀態，集電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流路(lu)(lu)通(tong)過用(yong)萬用(yong)檢測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)(qi)測(ce)(ce)量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)(qi)的(de)(de)(de)(de)容(rong)量(liang)庫選擇(ze)適幸的(de)(de)(de)(de)歐姆檔(dang)(dang)盧般來說(shuo)，47，1以上的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)選擇(ze)父檔(dang)(dang)，47從，以上65選擇(ze)，檔(dang)(dang)，10以上的(de)(de)(de)(de)選擇(ze)8父比(bi)(bi)檔(dang)(dang)，容(rong)量(liang)為47卿以上的(de)(de)(de)(de)選擇(ze)尺，讓測(ce)(ce)纛(dao)時(shi)(shi)，頭(tou)指(zhi)(zhi)(zhi)針(zhen)應立即向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻為零的(de)(de)(de)(de)方向(xiang)(xiang)(xiang)擺動(dong)，然后(hou)器(qi)(qi)(qi)，則(ze)針(zhen)又向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)為零如(ru)方向(xiang)(xiang)(xiang)，島并(bing)且(qie)幅(fu)(fu)度(du)大(da)，被，回到，這就(jiu)是電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)(qi)的(de)(de)(de)(de)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)與放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)過程(cheng)在測(ce)(ce)量(liang)過程(cheng)中，隸針(zhen)向(xiang)(xiang)(xiang)零方向(xiang)(xiang)(xiang)擺動(dong)的(de)(de)(de)(de)幅(fu)(fu)度(du)愈(yu)大(da)明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)量(liang)愈(yu)大(da)，反之則(ze)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)量(liang)愈(yu)小。利用(yong)這個原理(li)可以粗測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)(qi)是否有(you)容(rong)量(liang)，并(bing)可以比(bi)(bi)較兩只電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)(qi)容(rong)量(liang)的(de)(de)(de)(de)大(da)小，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)(qi)漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)與擊穿的(de)(de)(de)(de)測(ce)(ce)量(liang)。

　　將萬用(yong)(yong)(yong)(yong)打至(zhi)(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)(qi)用(yong)(yong)(yong)(yong)父(fu)讓檔，測倨時(shi)(shi)(shi)可(ke)以看到(dao)(dao)針右偏定角度后，然后漸(jian)漸(jian)向(xiang)左偏轉，直至(zhi)(zhi)靠進(jin)阻(zu)(zu)值刻度為(wei)(wei)(wei)處(chu)(chu)但不(bu)(bu)會達到(dao)(dao)處(chu)(chu)實(shi)驗證明(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)(qi)的(de)(de)絕緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)般應在(zai)幾(ji)百千歐以上，其(qi)(qi)(qi)它電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)的(de)(de)絕緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)在(zai)幾(ji)十(shi)兆歐以土(tu)對(dui)(dui)于(yu)(yu)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)(qi)，萬用(yong)(yong)(yong)(yong)的(de)(de)黑筆應接其(qi)(qi)(qi)正極，若(ruo)絕緣(yuan)(yuan)且小于(yu)(yu)上述值，則(ze)明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)絕緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)愈小，漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)愈嚴重；絕緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)為(wei)(wei)(wei)零(ling)，說明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)己擊穿短路(lu)。，33插座等(deng)對(dui)(dui)電(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)，另路(lu)則(ze)通過；9為(wei)(wei)(wei)提供(gong)基極電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流，使(shi)丁1維持導通，02發光，指充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)正在(zai)進(jin)行。3.芻電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)充(chong)(chong)到(dao)(dao)定值或因電(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)壓(ya)升高，經(jing)耵(ding)4分(fen)壓(ya)使(shi)555第(di)，腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)大于(yu)(yu)第(di)，腳(jiao)(jiao)(jiao)(jiao)屯位(wei)82時(shi)(shi)(shi)，555置零(ling)，第(di)腳(jiao)(jiao)(jiao)(jiao)內(nei)部放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)管導通輸出(chu)(chu)低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平1了(le)(le)(le)2截(jie)止(zhi)(zhi)(zhi)，迅速切(qie)(qie)斷充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，路(lu)此02熄滅(mie)，從而對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)起到(dao)(dao)了(le)(le)(le)保護作(zuo)用(yong)(yong)(yong)(yong)。4.今家(jia)用(yong)(yong)(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)極性不(bu)(bu)正確，即(ji)點對(dui)(dui)8點地為(wei)(wei)(wei)負時(shi)(shi)(shi)，了(le)(le)(le)1了(le)(le)(le)2亦截(jie)止(zhi)(zhi)(zhi)，從而防(fang)止(zhi)(zhi)(zhi)了(le)(le)(le)對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)的(de)(de)反向(xiang)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)路(lu)中，5的(de)(de)作(zuo)用(yong)(yong)(yong)(yong)是(shi)當555第(di)腳(jiao)(jiao)(jiao)(jiao)輸出(chu)(chu)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平時(shi)(shi)(shi)，通過05對(dui)(dui)，2迅速充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，使(shi)555第(di)腳(jiao)(jiao)(jiao)(jiao)及時(shi)(shi)(shi)上升為(wei)(wei)(wei)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平，當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)有接觸不(bu)(bu)良情況，使(shi)第(di)腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)大子第(di)，腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)，555迅速輸出(chu)(chu)低屯平，及時(shi)(shi)(shi)切(qie)(qie)斷充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)回路(lu)5的(de)(de)作(zuo)用(yong)(yong)(yong)(yong)是(shi)當囚電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)接觸不(bu)(bu)等(deng)原因致(zhi)使(shi)555置零(ling)時(shi)(shi)(shi)，其(qi)(qi)(qi)第(di)，腳(jiao)(jiao)(jiao)(jiao)為(wei)(wei)(wei)低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平，02通過5放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，直至(zhi)(zhi)第(di)腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平小于(yu)(yu)或等(deng)于(yu)(yu)第(di)腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平的(de)(de)12，555第(di)腳(jiao)(jiao)(jiao)(jiao)又(you)輸出(chu)(chu)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平，如果此時(shi)(shi)(shi)屯池(chi)(chi)(chi)接觸不(bu)(bu)15問已解(jie)決，則(ze)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)又(you)動進(jin)入(ru)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀態(tai)。

　　元(yuan)件選擇(ze)選覬555時基(ji)電(dian)(dian)路(lu)；7選次級電(dian)(dian)壓(ya)為6卯的31變(bian)壓(ya)器52用(yong)(yong)單刀擲開(kai)關(guan)，53用(yong)(yong)雙刀雙擲開(kai)關(guan)；了1選3彡100 8550等，充(chong)電(dian)(dian)器輸出插頭義選用(yong)(yong)十字型電(dian)(dian)源插頭其它元(yuan)件如附(fu)調(diao)試與(yu)使用(yong)(yong)電(dian)(dian)路(lu)裝好后(hou)，只需將萬用(yong)(yong)置電(dian)(dian)流檔后(hou)串接(jie)于充(chong)電(dian)(dian)回路(lu)，視電(dian)(dian)池類型微調(diao)RP，將充(chong)電(dian)(dian)電(dian)(dian)流調(diao)整到規定值即可。