鋅錳干電池充電器電路,鋅錳干電池充電器，具有定時和充電指示功能，其充電電流為5OmA，可用于對端電壓為1.35~1/4V的鋅錳干電池充電器，具有(you)定時和充(chong)電(dian)(dian)指示(shi)功(gong)能，其充(chong)電(dian)(dian)電(dian)(dian)流為5OmA，可用于對(dui)端電(dian)(dian)壓為1.35~1/4V的(de)全密封普通干(gan)電(dian)(dian)池(chi)充(chong)電(dian)(dian)。

電路工作原理：

該鋅錳干電(dian)(dian)池(chi)充(chong)電(dian)(dian)器電(dian)(dian)路(lu)由(you)電(dian)(dian)源輸入穩(wen)壓電(dian)(dian)路(lu)、充(chong)電(dian)(dian)電(dian)(dian)路(lu)和定(ding)時控制電(dian)(dian)路(lu)組成.

電源輸(shu)入穩壓(ya)電路由電源并關S2、熔斷器(qi)FU1、電源變壓(ya)器(qi)T、整流二極管VD、濾波電容(rong)器(qi)C1、C3和穩壓(ya)集成(cheng)電路組(zu)成(cheng)。

定(ding)時(shi)控制(zhi)電(dian)路由定(ding)時(shi)起動按鈕S1、定(ding)時(shi)控制(zhi)開關S3、定(ding)時(shi)控制(zhi)集成電(dian)路IC2、電(dian)阻器(qi)R1~R5、電(dian)容(rong)器(qi)C2、停止(zhi)充(chong)電(dian)指示發光二極管(guan)VL5、VL6、晶體管(guan)V和繼電(dian)器(qi)K組成。

充電電路(lu)由(you)電位器RP、電阻器R6~R13、充電指示發光(guang)二(er)極管VL1~VL4和(he)熔斷器FU2~FU5組成(cheng)。

接(jie)通S2，交流220V電壓(ya)(ya)經T降壓(ya)(ya)、VD整(zheng)流及C3濾波后(hou)，一路作(zuo)為(wei)充電電路的輸入電壓(ya)(ya);另一路經IC1穩壓(ya)(ya)后(hou)為(wei)IC2提(ti)供+12V工作(zuo)電壓(ya)(ya)。

按動一下(xia)定時起動按鈕S1，IC2開(kai)始(shi)計(ji)時工作;其(qi)3腳輸出(chu)高電平使V導通，K吸(xi)合，K的(de)常(chang)開(kai)觸頭接通，電池GB1~GB4開(kai)始(shi)充電，同時VL1~VL4點亮。

S3用來設(she)定充(chong)電(dian)(dian)(dian)時(shi)間，其定時(shi)范圍有3h、5h、7h和9h共(gong)4檔。對AA型干(gan)電(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)時(shi)，最(zui)佳(jia)充(chong)電(dian)(dian)(dian)時(shi)間為5h;對C型干(gan)電(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)時(shi)，最(zui)佳(jia)充(chong)電(dian)(dian)(dian)時(shi)間為9h。

當定時時間(jian)結束(shu)時，IC2的(de)(de)3腳輸出低(di)電(dian)(dian)平(ping)，使V截止(zhi)(zhi)，K釋放，電(dian)(dian)池停止(zhi)(zhi)充電(dian)(dian);同(tong)時IC2的(de)(de)2腳由低(di)電(dian)(dian)平(ping)變為高電(dian)(dian)平(ping)，使VL5和VL6點亮，指示(shi)充電(dian)(dian)結束(shu)。

調整RP的阻值(zhi)，可改變充電電壓和充電電流的大小。

元器件選擇：

R1~R5、R6、R8、R1O和R12均選用l/4W的金屬膜電阻器；R7、R9、R11和R13均選用1W的金屬膜電阻器。

RP選用2W的(de)線繞(rao)可變(bian)電阻器(qi)。

C1選(xuan)用(yong)獨(du)石電(dian)(dian)容(rong)器;C2選(xuan)用(yong)耐壓(ya)值為(wei)16V的鋁(lv)(lv)電(dian)(dian)解(jie)電(dian)(dian)容(rong)器；C3選(xuan)用(yong)耐壓(ya)值為(wei)5OV的鋁(lv)(lv)電(dian)(dian)解(jie)電(dian)(dian)容(rong)器。

VD選用1N4004或1N4007型硅整(zheng)流(liu)二極管(guan)。

VL1~VL6均(jun)選用φ3mm的發光二(er)極管(guan)。

V選用S805O或C8050型硅NPN晶(jing)體管。

IC1選(xuan)用LM7812型三(san)端穩壓集成電路;IC2選(xuan)用ZN1034型定時集成電路。

K選用4098型12V直流繼電(dian)器(qi)。

S1選(xuan)(xuan)用(yong)(yong)微型動合按鈕;S2選(xuan)(xuan)用(yong)(yong)250V，觸頭電流(liu)容量為5A的電源開關(guan);S3選(xuan)(xuan)用(yong)(yong)單極四位型轉(zhuan)換開關(guan)。

T選用3~5W、二次電壓為12~15V的電源變壓器。