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)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)如附。變(bian)壓(ya)器(qi)了，41為(wei)(wei)整機(ji)提供工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源；時基電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)555組(zu)(zu)成(cheng)限壓(ya)控制電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)和(he)！組(zu)(zu)成(cheng)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池極(ji)(ji)(ji)性檢(jian)測電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)了2102把(ba)等組(zu)(zu)成(cheng)簡易(yi)可調恒流(liu)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)中兒(er)01的正極(ji)(ji)(ji)接555控制端(duan)第(di)，腳(jiao)(jiao)，將555內比(bi)較器(qi)閾值電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)設定為(wei)(wei)2V左右即發光管的i下向壓(ya)降，同時還(huan)起到(dao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源指的作(zuo)(zuo)印(yin)；12起。行(xing)趕(gan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)指與(yu)穩定，了2發射結電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的雙屯作(zuo)(zuo)出(chu)。，4分壓(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)和(he)52組(zu)(zu)成(cheng)限壓(ya)切換電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)，分別(bie)為(wei)(wei)34.5和(he)6檔(dang)(dang)，53用(yong)于充(chong)屯極(ji)(ji)(ji)性的轉換。其工(gong)作(zuo)(zuo)過程(cheng)如下打(da)開(kai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源，關(guan)5電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)得屯工(gong)作(zuo)(zuo)兒(er)01發光指。加電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)初始，因02兩端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)還(huan)沒有(you)改變(bian)，555因第(di)②腳(jiao)(jiao)為(wei)(wei)低電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平rfD置位，第(di)③腳(jiao)(jiao)輸(shu)出(chu)l，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)乎，第(di)腳(jiao)(jiao)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)端(duan)內部極(ji)(ji)(ji)管截止。1.在不連接電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)時，因無(wu)基極(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)而截止，172截止，02不發光，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)對外無(wu)輸(shu)出(chu)。2.當充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)插入裝有(you)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)插座時，若電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池極(ji)(ji)(ji)性正確即4點為(wei)(wei)正點為(wei)(wei)負(fu)，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)通(tong)過539加到(dao)7的發射結，使導通(tong)了2進入工(gong)作(zuo)(zuo)狀態(tai)，集電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)電(dian)(dian)(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)(dian)(dian)容(rong)(rong)(rong)器(qi)測量(liang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)的容(rong)(rong)(rong)量(liang)庫選(xuan)(xuan)(xuan)(xuan)擇(ze)適幸的歐(ou)姆(mu)檔(dang)(dang)盧般(ban)來說，47，1以(yi)上(shang)(shang)(shang)的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)選(xuan)(xuan)(xuan)(xuan)擇(ze)父檔(dang)(dang)，47從，以(yi)上(shang)(shang)(shang)65選(xuan)(xuan)(xuan)(xuan)擇(ze)，檔(dang)(dang)，10以(yi)上(shang)(shang)(shang)的選(xuan)(xuan)(xuan)(xuan)擇(ze)8父比(bi)檔(dang)(dang)，容(rong)(rong)(rong)量(liang)為(wei)(wei)47卿以(yi)上(shang)(shang)(shang)的選(xuan)(xuan)(xuan)(xuan)擇(ze)尺，讓測纛時，頭(tou)指針應立即向電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻為(wei)(wei)零的方(fang)(fang)向擺(bai)動，然(ran)后器(qi)，則針又向電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)為(wei)(wei)零如方(fang)(fang)向，島并且(qie)幅度大(da)(da)，被，回到(dao)，這就是電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)的充(chong)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)在測量(liang)過程(cheng)中，隸(li)針向零方(fang)(fang)向擺(bai)動的幅度愈(yu)大(da)(da)明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)量(liang)愈(yu)大(da)(da)，反之則電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)量(liang)愈(yu)小(xiao)。利用(yong)這個原理(li)(li)可以(yi)粗測電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)是否(fou)有(you)容(rong)(rong)(rong)量(liang)，并可以(yi)比(bi)較兩只(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)容(rong)(rong)(rong)量(liang)的大(da)(da)小(xiao)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)器(qi)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)與(yu)擊穿(chuan)的測量(liang)。

　　將萬用(yong)打至8父(fu)檔(dang)測(ce)量電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)用(yong)父(fu)讓檔(dang)，測(ce)倨時(shi)(shi)(shi)可(ke)以(yi)看到針右偏(pian)定角(jiao)度后，然后漸漸向左偏(pian)轉，直至靠進阻值(zhi)刻(ke)度為(wei)處(chu)但不(bu)(bu)(bu)會達到處(chu)實驗證明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)的絕(jue)緣(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻般應(ying)在幾(ji)百千歐(ou)以(yi)上(shang)，其它電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)的絕(jue)緣(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻在幾(ji)十兆歐(ou)以(yi)土對(dui)于(yu)(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)，萬用(yong)的黑筆應(ying)接(jie)其正(zheng)極(ji)，若絕(jue)緣(yuan)且小(xiao)于(yu)(yu)上(shang)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)器(qi)漏電(dian)(dian)(dian)(dian)(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)(dian)(dian)(dian)(dian)阻愈(yu)小(xiao)，漏電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)愈(yu)嚴重；絕(jue)緣(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻為(wei)零，說(shuo)明(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)器(qi)己擊(ji)穿短(duan)路(lu)(lu)。，33插(cha)座等(deng)對(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(lu)(lu)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，使(shi)(shi)(shi)(shi)丁1維持導(dao)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(zheng)在進行。3.芻(chu)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)壓充(chong)(chong)(chong)到定值(zhi)或因電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)接(jie)觸不(bu)(bu)(bu)良(liang)，使(shi)(shi)(shi)(shi)點(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓升高，經(jing)耵(ding)4分壓使(shi)(shi)(shi)(shi)555第(di)(di)，腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)大于(yu)(yu)第(di)(di)，腳(jiao)(jiao)(jiao)(jiao)屯(tun)(tun)位(wei)82時(shi)(shi)(shi)，555置零，第(di)(di)腳(jiao)(jiao)(jiao)(jiao)內部(bu)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)管導(dao)通輸出(chu)(chu)(chu)低(di)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)1了(le)2截止(zhi)，迅速(su)切斷充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，路(lu)(lu)此02熄滅，從而對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)起到了(le)保護作(zuo)用(yong)。4.今(jin)家用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)極(ji)性不(bu)(bu)(bu)正(zheng)確(que)，即點(dian)對(dui)8點(dian)地(di)為(wei)負時(shi)(shi)(shi)，了(le)1了(le)2亦截止(zhi)，從而防止(zhi)了(le)對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的反向充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和(he)對(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)路(lu)(lu)中，5的作(zuo)用(yong)是當(dang)555第(di)(di)腳(jiao)(jiao)(jiao)(jiao)輸出(chu)(chu)(chu)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)時(shi)(shi)(shi)，通過05對(dui)，2迅速(su)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，使(shi)(shi)(shi)(shi)555第(di)(di)腳(jiao)(jiao)(jiao)(jiao)及(ji)時(shi)(shi)(shi)上(shang)升為(wei)高電(dian)(dian)(dian)(dian)(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)(dian)(dian)(dian)(dian)池(chi)(chi)有接(jie)觸不(bu)(bu)(bu)良(liang)情(qing)況，使(shi)(shi)(shi)(shi)第(di)(di)腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(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)(dian)(dian)(dian)(dian)位(wei)，555迅速(su)輸出(chu)(chu)(chu)低(di)屯(tun)(tun)平(ping)，及(ji)時(shi)(shi)(shi)切斷充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)回路(lu)(lu)5的作(zuo)用(yong)是當(dang)囚電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)接(jie)觸不(bu)(bu)(bu)等(deng)原(yuan)因致使(shi)(shi)(shi)(shi)555置零時(shi)(shi)(shi)，其第(di)(di)，腳(jiao)(jiao)(jiao)(jiao)為(wei)低(di)電(dian)(dian)(dian)(dian)(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)(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)(dian)(dian)(dian)(dian)平(ping)小(xiao)于(yu)(yu)或等(deng)于(yu)(yu)第(di)(di)腳(jiao)(jiao)(jiao)(jiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)的12，555第(di)(di)腳(jiao)(jiao)(jiao)(jiao)又(you)輸出(chu)(chu)(chu)高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)平(ping)，如(ru)果此時(shi)(shi)(shi)屯(tun)(tun)池(chi)(chi)接(jie)觸不(bu)(bu)(bu)15問已解(jie)決，則(ze)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)又(you)動(dong)進入(ru)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)態(tai)。

　　元(yuan)件選擇選覬555時基電(dian)(dian)(dian)路(lu)；7選次級(ji)電(dian)(dian)(dian)壓(ya)為6卯的31變壓(ya)器52用單刀擲(zhi)開關(guan)，53用雙(shuang)(shuang)刀雙(shuang)(shuang)擲(zhi)開關(guan)；了1選3彡100 8550等，充(chong)電(dian)(dian)(dian)器輸(shu)出插(cha)頭義選用十(shi)字(zi)型(xing)電(dian)(dian)(dian)源插(cha)頭其它元(yuan)件如附(fu)調(diao)試與(yu)使用電(dian)(dian)(dian)路(lu)裝好后(hou)，只需將萬用置電(dian)(dian)(dian)流(liu)檔后(hou)串接于充(chong)電(dian)(dian)(dian)回路(lu)，視電(dian)(dian)(dian)池類型(xing)微調(diao)RP，將充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)調(diao)整到規定值即可。