防爆閃光燈的電路由四部分(fen)組成：振蕩(dang)升壓(ya)部分(fen)、整流充電部分(fen)、電壓(ya)指示(shi)部分(fen)和脈沖觸發閃光部分(fen)。

當電(dian)(dian)源接(jie)通(tong)后(hou)，利用晶體(ti)管(guan)(guan)V1的(de)開(kai)關特性，形成一個間歇振蕩，使(shi)T1的(de)初級(ji)獲得一個交變(bian)電(dian)(dian)壓，經T1升(sheng)壓，使(shi)其(qi)次級(ji)獲得大于300V的(de)交變(bian)電(dian)(dian)壓。交變(bian)電(dian)(dian)壓經二極管(guan)(guan)D1半波(bo)整流(liu)后(hou)變(bian)成直流(liu)電(dian)(dian)壓，對主電(dian)(dian)容(rong)(rong)C2和觸(chu)(chu)發電(dian)(dian)容(rong)(rong)C3充(chong)電(dian)(dian)儲能。當電(dian)(dian)壓充(chong)至額(e)定電(dian)(dian)壓的(de)70%左右時，指示電(dian)(dian)路(lu)中的(de)氖燈（Ne）起輝，指示閃(shan)(shan)光(guang)(guang)燈處于正常閃(shan)(shan)光(guang)(guang)等待狀(zhuang)態。當按(an)下按(an)鈕(niu)AN，觸(chu)(chu)發電(dian)(dian)路(lu)（由R3、C3、T2和Xe組(zu)成）產生(sheng)脈沖(chong)電(dian)(dian)壓，在T2的(de)次級(ji)感應出瞬間高壓（約10kV）脈沖(chong)，通(tong)過Xe閃(shan)(shan)光(guang)(guang)管(guan)(guan)的(de)觸(chu)(chu)發極使(shi)Xe閃(shan)(shan)光(guang)(guang)管(guan)(guan)內氮(dan)氣電(dian)(dian)離(li)并導(dao)通(tong)，電(dian)(dian)容(rong)(rong)C2上儲存(cun)的(de)電(dian)(dian)能瞬間通(tong)過閃(shan)(shan)光(guang)(guang)燈管(guan)(guan)放電(dian)(dian)轉化為光(guang)(guang)能，完成一次閃(shan)(shan)光(guang)(guang)。