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。

　　工作原理電(dian)(dian)(dian)(dian)(dian)路(lu)如(ru)附。變壓(ya)(ya)器了(le)，41為(wei)整機提供工作電(dian)(dian)(dian)(dian)(dian)源；時(shi)(shi)基(ji)(ji)電(dian)(dian)(dian)(dian)(dian)路(lu)555組(zu)成(cheng)限(xian)壓(ya)(ya)控(kong)制電(dian)(dian)(dian)(dian)(dian)路(lu)和(he)！組(zu)成(cheng)充(chong)電(dian)(dian)(dian)(dian)(dian)池(chi)極(ji)(ji)(ji)性(xing)檢(jian)測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)路(lu)了(le)2102把等組(zu)成(cheng)簡易(yi)可調恒流充(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)路(lu)。電(dian)(dian)(dian)(dian)(dian)路(lu)中(zhong)兒01的(de)(de)(de)(de)(de)(de)正(zheng)極(ji)(ji)(ji)接555控(kong)制端第(di)，腳，將555內比較器閾值電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)設定為(wei)2V左右即發光管的(de)(de)(de)(de)(de)(de)i下向(xiang)壓(ya)(ya)降，同(tong)時(shi)(shi)還起(qi)到(dao)電(dian)(dian)(dian)(dian)(dian)源指(zhi)的(de)(de)(de)(de)(de)(de)作印(yin)；12起(qi)。行(xing)趕電(dian)(dian)(dian)(dian)(dian)指(zhi)與(yu)穩定，了(le)2發射結(jie)電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)雙屯作出(chu)。，4分壓(ya)(ya)電(dian)(dian)(dian)(dian)(dian)路(lu)和(he)52組(zu)成(cheng)限(xian)壓(ya)(ya)切(qie)換電(dian)(dian)(dian)(dian)(dian)路(lu)，分別為(wei)34.5和(he)6檔(dang)(dang)，53用于充(chong)屯極(ji)(ji)(ji)性(xing)的(de)(de)(de)(de)(de)(de)轉換。其工作過(guo)(guo)程(cheng)如(ru)下打開電(dian)(dian)(dian)(dian)(dian)源，關5電(dian)(dian)(dian)(dian)(dian)路(lu)得屯工作兒01發光指(zhi)。加電(dian)(dian)(dian)(dian)(dian)初始，因(yin)02兩端電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)還沒有改變，555因(yin)第(di)②腳為(wei)低電(dian)(dian)(dian)(dian)(dian)平(ping)rfD置位，第(di)③腳輸出(chu)l，電(dian)(dian)(dian)(dian)(dian)乎，第(di)腳放電(dian)(dian)(dian)(dian)(dian)端內部極(ji)(ji)(ji)管截(jie)(jie)止。1.在不連(lian)接電(dian)(dian)(dian)(dian)(dian)器時(shi)(shi)，因(yin)無基(ji)(ji)極(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)流而截(jie)(jie)止，172截(jie)(jie)止，02不發光，充(chong)電(dian)(dian)(dian)(dian)(dian)器對外(wai)無輸出(chu)。2.當充(chong)電(dian)(dian)(dian)(dian)(dian)器插入裝有電(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)器插座時(shi)(shi)，若電(dian)(dian)(dian)(dian)(dian)池(chi)極(ji)(ji)(ji)性(xing)正(zheng)確即4點為(wei)正(zheng)點為(wei)負(fu)，電(dian)(dian)(dian)(dian)(dian)池(chi)殘存電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)通過(guo)(guo)539加到(dao)7的(de)(de)(de)(de)(de)(de)發射結(jie)，使導(dao)通了(le)2進入工作狀態，集(ji)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)流路(lu)通過(guo)(guo)用萬用檢(jian)測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器測(ce)(ce)量(liang)(liang)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器的(de)(de)(de)(de)(de)(de)容(rong)(rong)(rong)量(liang)(liang)庫選(xuan)(xuan)擇適幸的(de)(de)(de)(de)(de)(de)歐姆檔(dang)(dang)盧(lu)般來說，47，1以(yi)(yi)上(shang)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)選(xuan)(xuan)擇父檔(dang)(dang)，47從，以(yi)(yi)上(shang)65選(xuan)(xuan)擇，檔(dang)(dang)，10以(yi)(yi)上(shang)的(de)(de)(de)(de)(de)(de)選(xuan)(xuan)擇8父比檔(dang)(dang)，容(rong)(rong)(rong)量(liang)(liang)為(wei)47卿以(yi)(yi)上(shang)的(de)(de)(de)(de)(de)(de)選(xuan)(xuan)擇尺，讓測(ce)(ce)纛(dao)時(shi)(shi)，頭指(zhi)針應立(li)即向(xiang)電(dian)(dian)(dian)(dian)(dian)阻為(wei)零(ling)(ling)的(de)(de)(de)(de)(de)(de)方向(xiang)擺(bai)動(dong)，然后器，則針又向(xiang)電(dian)(dian)(dian)(dian)(dian)為(wei)零(ling)(ling)如(ru)方向(xiang)，島并且(qie)幅度大(da)，被(bei)，回到(dao)，這就是電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器的(de)(de)(de)(de)(de)(de)充(chong)電(dian)(dian)(dian)(dian)(dian)與(yu)放電(dian)(dian)(dian)(dian)(dian)過(guo)(guo)程(cheng)在測(ce)(ce)量(liang)(liang)過(guo)(guo)程(cheng)中(zhong)，隸針向(xiang)零(ling)(ling)方向(xiang)擺(bai)動(dong)的(de)(de)(de)(de)(de)(de)幅度愈(yu)大(da)明電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)量(liang)(liang)愈(yu)大(da)，反之則電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)量(liang)(liang)愈(yu)小(xiao)。利用這個原理可以(yi)(yi)粗測(ce)(ce)電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器是否有容(rong)(rong)(rong)量(liang)(liang)，并可以(yi)(yi)比較兩只電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器容(rong)(rong)(rong)量(liang)(liang)的(de)(de)(de)(de)(de)(de)大(da)小(xiao)，電(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器漏(lou)電(dian)(dian)(dian)(dian)(dian)與(yu)擊穿(chuan)的(de)(de)(de)(de)(de)(de)測(ce)(ce)量(liang)(liang)。

　　將萬用(yong)(yong)(yong)(yong)打至8父檔(dang)測(ce)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(rong)器(qi)用(yong)(yong)(yong)(yong)父讓檔(dang)，測(ce)倨(ju)時(shi)(shi)可以看到針(zhen)右偏定角度后，然后漸(jian)(jian)漸(jian)(jian)向左偏轉，直至靠進阻值刻度為(wei)(wei)(wei)(wei)處但不(bu)(bu)會達到處實驗(yan)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(rong)器(qi)的(de)(de)絕(jue)(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻般應(ying)(ying)在幾百千歐以上，其它電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)的(de)(de)絕(jue)(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻在幾十兆歐以土對(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(rong)器(qi)，萬用(yong)(yong)(yong)(yong)的(de)(de)黑筆應(ying)(ying)接(jie)其正極(ji)，若絕(jue)(jue)緣(yuan)(yuan)且(qie)小于上述(shu)值，則明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)漏電(dian)(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)(dian)阻愈小，漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)愈嚴重；絕(jue)(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻為(wei)(wei)(wei)(wei)零，說明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)器(qi)己(ji)擊穿(chuan)短路(lu)。，33插(cha)座等對(dui)電(dian)(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)(dian)，另(ling)路(lu)則通(tong)過(guo)；9為(wei)(wei)(wei)(wei)提供基極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，使(shi)(shi)丁(ding)1維持導通(tong)，02發光，指(zhi)充(chong)電(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)池(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓充(chong)到定值或因(yin)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)接(jie)觸(chu)不(bu)(bu)良(liang)，使(shi)(shi)點(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓升高，經(jing)耵4分壓使(shi)(shi)555第(di)(di)，腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)大于第(di)(di)，腳(jiao)(jiao)(jiao)(jiao)屯(tun)位(wei)82時(shi)(shi)，555置(zhi)零，第(di)(di)腳(jiao)(jiao)(jiao)(jiao)內部(bu)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)管導通(tong)輸(shu)出(chu)(chu)(chu)低(di)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)1了2截(jie)止(zhi)，迅速(su)切(qie)斷充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，路(lu)此(ci)02熄滅，從(cong)而對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)起到了保護(hu)作(zuo)(zuo)用(yong)(yong)(yong)(yong)。4.今家用(yong)(yong)(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)極(ji)性不(bu)(bu)正確，即(ji)點(dian)對(dui)8點(dian)地為(wei)(wei)(wei)(wei)負時(shi)(shi)，了1了2亦截(jie)止(zhi)，從(cong)而防止(zhi)了對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)的(de)(de)反(fan)向充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)路(lu)中，5的(de)(de)作(zuo)(zuo)用(yong)(yong)(yong)(yong)是當(dang)555第(di)(di)腳(jiao)(jiao)(jiao)(jiao)輸(shu)出(chu)(chu)(chu)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)時(shi)(shi)，通(tong)過(guo)05對(dui)，2迅速(su)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，使(shi)(shi)555第(di)(di)腳(jiao)(jiao)(jiao)(jiao)及(ji)時(shi)(shi)上升為(wei)(wei)(wei)(wei)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)，當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)有(you)接(jie)觸(chu)不(bu)(bu)良(liang)情(qing)況，使(shi)(shi)第(di)(di)腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)大子第(di)(di)，腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)，555迅速(su)輸(shu)出(chu)(chu)(chu)低(di)屯(tun)平(ping)(ping)，及(ji)時(shi)(shi)切(qie)斷充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)回(hui)路(lu)5的(de)(de)作(zuo)(zuo)用(yong)(yong)(yong)(yong)是當(dang)囚電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)接(jie)觸(chu)不(bu)(bu)等原因(yin)致使(shi)(shi)555置(zhi)零時(shi)(shi)，其第(di)(di)，腳(jiao)(jiao)(jiao)(jiao)為(wei)(wei)(wei)(wei)低(di)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)，02通(tong)過(guo)5放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，直至第(di)(di)腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)小于或等于第(di)(di)腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)的(de)(de)12，555第(di)(di)腳(jiao)(jiao)(jiao)(jiao)又輸(shu)出(chu)(chu)(chu)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)(ping)，如果(guo)此(ci)時(shi)(shi)屯(tun)池(chi)(chi)(chi)接(jie)觸(chu)不(bu)(bu)15問已解決(jue)，則充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)又動進入充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)態。

　　元件(jian)選(xuan)擇(ze)選(xuan)覬555時基電(dian)路(lu)；7選(xuan)次級電(dian)壓為6卯的31變(bian)壓器52用單刀(dao)(dao)擲(zhi)開關，53用雙(shuang)(shuang)刀(dao)(dao)雙(shuang)(shuang)擲(zhi)開關；了1選(xuan)3彡100 8550等，充電(dian)器輸出插頭義(yi)選(xuan)用十字型電(dian)源插頭其它元件(jian)如(ru)附調(diao)試與使用電(dian)路(lu)裝好后(hou)，只(zhi)需將(jiang)萬(wan)用置(zhi)電(dian)流檔(dang)后(hou)串接于充電(dian)回路(lu)，視電(dian)池類型微調(diao)RP，將(jiang)充電(dian)電(dian)流調(diao)整(zheng)到規(gui)定值即可(ke)。