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)(dian)路(lu)(lu)如(ru)附。變壓(ya)(ya)器(qi)(qi)(qi)了(le)，41為(wei)整機(ji)提供工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源；時基(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)555組(zu)成(cheng)限壓(ya)(ya)控制電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)和(he)！組(zu)成(cheng)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池極(ji)性(xing)檢測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)了(le)2102把等組(zu)成(cheng)簡易可調恒流(liu)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。電(dian)(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)接(jie)555控制端(duan)第，腳(jiao)，將555內(nei)比(bi)較(jiao)器(qi)(qi)(qi)閾值電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)設定(ding)為(wei)2V左右即發(fa)(fa)光管(guan)的(de)(de)(de)(de)i下(xia)向壓(ya)(ya)降(jiang)，同時還起到電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源指(zhi)的(de)(de)(de)(de)作(zuo)(zuo)印；12起。行趕電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)指(zhi)與穩(wen)定(ding)，了(le)2發(fa)(fa)射結電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)雙(shuang)屯(tun)作(zuo)(zuo)出。，4分(fen)壓(ya)(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)和(he)52組(zu)成(cheng)限壓(ya)(ya)切換電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)，分(fen)別為(wei)34.5和(he)6檔(dang)，53用(yong)于充(chong)(chong)屯(tun)極(ji)性(xing)的(de)(de)(de)(de)轉換。其工(gong)作(zuo)(zuo)過(guo)程(cheng)如(ru)下(xia)打開電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源，關(guan)5電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)得屯(tun)工(gong)作(zuo)(zuo)兒01發(fa)(fa)光指(zhi)。加(jia)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)初(chu)始，因02兩端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)還沒有(you)改變，555因第②腳(jiao)為(wei)低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)rfD置位，第③腳(jiao)輸(shu)(shu)出l，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)乎，第腳(jiao)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)端(duan)內(nei)部極(ji)管(guan)截(jie)止。1.在(zai)不連接(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)時，因無基(ji)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)而截(jie)止，172截(jie)止，02不發(fa)(fa)光，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)對外無輸(shu)(shu)出。2.當充(chong)(chong)電(dian)(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)(dian)池的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)插座時，若(ruo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池極(ji)性(xing)正(zheng)確即4點為(wei)正(zheng)點為(wei)負，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池殘存電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)通(tong)(tong)(tong)過(guo)539加(jia)到7的(de)(de)(de)(de)發(fa)(fa)射結，使導通(tong)(tong)(tong)了(le)2進入(ru)工(gong)作(zuo)(zuo)狀態，集(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)路(lu)(lu)通(tong)(tong)(tong)過(guo)用(yong)萬用(yong)檢測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)(qi)測(ce)量(liang)(liang)電(dian)(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)(liang)庫(ku)選(xuan)擇(ze)適幸的(de)(de)(de)(de)歐(ou)姆檔(dang)盧般來說，47，1以上(shang)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)選(xuan)擇(ze)父檔(dang)，47從(cong)，以上(shang)65選(xuan)擇(ze)，檔(dang)，10以上(shang)的(de)(de)(de)(de)選(xuan)擇(ze)8父比(bi)檔(dang)，容(rong)量(liang)(liang)為(wei)47卿(qing)以上(shang)的(de)(de)(de)(de)選(xuan)擇(ze)尺，讓測(ce)纛時，頭指(zhi)針(zhen)(zhen)應立即向電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻為(wei)零的(de)(de)(de)(de)方(fang)(fang)向擺動(dong)，然后器(qi)(qi)(qi)，則(ze)針(zhen)(zhen)又(you)向電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)為(wei)零如(ru)方(fang)(fang)向，島并且幅度(du)大，被，回到，這就是(shi)(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)(qi)的(de)(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)與放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)過(guo)程(cheng)在(zai)測(ce)量(liang)(liang)過(guo)程(cheng)中，隸針(zhen)(zhen)向零方(fang)(fang)向擺動(dong)的(de)(de)(de)(de)幅度(du)愈(yu)大明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)量(liang)(liang)愈(yu)大，反(fan)之則(ze)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)量(liang)(liang)愈(yu)小(xiao)。利用(yong)這個原理(li)可以粗測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)(qi)是(shi)(shi)否(fou)有(you)容(rong)量(liang)(liang)，并可以比(bi)較(jiao)兩只(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)(qi)(qi)容(rong)量(liang)(liang)的(de)(de)(de)(de)大小(xiao)，電(dian)(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)(dian)與擊(ji)穿的(de)(de)(de)(de)測(ce)量(liang)(liang)。

　　將萬(wan)用(yong)(yong)(yong)打至(zhi)8父檔測量電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)用(yong)(yong)(yong)父讓檔，測倨時(shi)(shi)(shi)(shi)(shi)可以(yi)看(kan)到(dao)(dao)針(zhen)右偏(pian)定角度后，然后漸(jian)漸(jian)向左偏(pian)轉，直至(zhi)靠進阻(zu)值刻度為(wei)(wei)(wei)處但不(bu)會達(da)到(dao)(dao)處實驗(yan)證明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)的(de)絕(jue)(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)般(ban)應在幾百千歐以(yi)上，其(qi)它電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)的(de)絕(jue)(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)在幾十兆歐以(yi)土對于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)，萬(wan)用(yong)(yong)(yong)的(de)黑筆應接其(qi)正極，若絕(jue)(jue)緣(yuan)(yuan)且小(xiao)于(yu)上述值，則明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)絕(jue)(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)愈(yu)小(xiao)，漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)愈(yu)嚴重；絕(jue)(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)為(wei)(wei)(wei)零(ling)，說明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容器(qi)己擊穿短路。，33插(cha)座等(deng)對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，另路則通(tong)(tong)過(guo)；9為(wei)(wei)(wei)提供基極電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流，使丁(ding)1維持導(dao)通(tong)(tong)，02發光(guang)，指充(chong)電(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)池(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)充(chong)到(dao)(dao)定值或(huo)因(yin)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)接觸不(bu)良(liang)，使點(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)升(sheng)高(gao)，經耵4分壓(ya)使555第(di)(di)，腳(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)大(da)于(yu)第(di)(di)，腳(jiao)屯位(wei)82時(shi)(shi)(shi)(shi)(shi)，555置零(ling)，第(di)(di)腳(jiao)內部(bu)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)管導(dao)通(tong)(tong)輸出(chu)低(di)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)1了(le)2截(jie)止，迅速(su)(su)切(qie)斷充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，路此02熄滅，從(cong)而(er)對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)起(qi)到(dao)(dao)了(le)保護作用(yong)(yong)(yong)。4.今家用(yong)(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)極性不(bu)正確，即(ji)點(dian)(dian)對8點(dian)(dian)地為(wei)(wei)(wei)負時(shi)(shi)(shi)(shi)(shi)，了(le)1了(le)2亦截(jie)止，從(cong)而(er)防止了(le)對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)的(de)反(fan)向充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)路中，5的(de)作用(yong)(yong)(yong)是(shi)當555第(di)(di)腳(jiao)輸出(chu)高(gao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)時(shi)(shi)(shi)(shi)(shi)，通(tong)(tong)過(guo)05對，2迅速(su)(su)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，使555第(di)(di)腳(jiao)及時(shi)(shi)(shi)(shi)(shi)上升(sheng)為(wei)(wei)(wei)高(gao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)，當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)有接觸不(bu)良(liang)情(qing)況(kuang)，使第(di)(di)腳(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)大(da)子(zi)第(di)(di)，腳(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)，555迅速(su)(su)輸出(chu)低(di)屯平(ping)(ping)，及時(shi)(shi)(shi)(shi)(shi)切(qie)斷充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)回路5的(de)作用(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)等(deng)原(yuan)因(yin)致使555置零(ling)時(shi)(shi)(shi)(shi)(shi)，其(qi)第(di)(di)，腳(jiao)為(wei)(wei)(wei)低(di)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)，02通(tong)(tong)過(guo)5放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，直至(zhi)第(di)(di)腳(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)小(xiao)于(yu)或(huo)等(deng)于(yu)第(di)(di)腳(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)的(de)12，555第(di)(di)腳(jiao)又(you)輸出(chu)高(gao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)，如果此時(shi)(shi)(shi)(shi)(shi)屯池(chi)(chi)(chi)接觸不(bu)15問已解決，則充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)又(you)動進入充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀態。

　　元(yuan)件選(xuan)(xuan)(xuan)擇(ze)選(xuan)(xuan)(xuan)覬555時基電(dian)路(lu)；7選(xuan)(xuan)(xuan)次級(ji)電(dian)壓為(wei)6卯的31變壓器52用單(dan)刀擲開關(guan)，53用雙(shuang)(shuang)刀雙(shuang)(shuang)擲開關(guan)；了1選(xuan)(xuan)(xuan)3彡100 8550等，充(chong)電(dian)器輸出插頭(tou)義選(xuan)(xuan)(xuan)用十字型(xing)電(dian)源插頭(tou)其它元(yuan)件如(ru)附調試(shi)與(yu)使(shi)用電(dian)路(lu)裝好(hao)后(hou)，只需將萬(wan)用置電(dian)流(liu)(liu)檔后(hou)串接(jie)于充(chong)電(dian)回路(lu)，視(shi)電(dian)池類型(xing)微調RP，將充(chong)電(dian)電(dian)流(liu)(liu)調整到規定值即可(ke)。