電源就是電的來源而充電器的輸出5v供(gong)手機充電(dian)，這就是手機的充電(dian)電(dian)源。那你知道手機充電(dian)器(qi)的構造(zao)嗎？

220v交流電經橋式整流濾波后經三極管振蕩經高磁變壓器后輸出低壓高頻電流，經光耦調節使輸出端再次半波整流電容濾波后穩壓成準5v的直流輸出其實這輸出的不是純直流如果用于放小音箱就有哈哈的交流聲怎么辦？
你想得到理想的純直流必須對輸出末端重新橋式整流加上16v1000uf的電容濾波就可以了。這里只是列舉的事例，這5v太低了再經整流，電壓電流更小了還是對那些適用的電源改造吧！
題主說用的5v充(chong)電(dian)(dian)(dian)(dian)器(qi)作(zuo)的電(dian)(dian)(dian)(dian)源(yuan)如(ru)果你(ni)的器(qi)具電(dian)(dian)(dian)(dian)源(yuan)為5v還要(yao)看是多少電(dian)(dian)(dian)(dian)流，如(ru)果正好適(shi)配，你(ni)就放心大膽用，不要(yao)去更改充(chong)電(dian)(dian)(dian)(dian)器(qi)，因為電(dian)(dian)(dian)(dian)源(yuan)供給波(bo)形與原器(qi)具相(xiang)適(shi)應再說就是濾(lv)波(bo)差點兒機內有電(dian)(dian)(dian)(dian)容濾(lv)波(bo)能自己解決(jue)問(wen)題的。