Don't throw away the old speakers, connect 2 wires and immediately use the value to double the value

[@劉翠娘]

喇叭用敲的生電這招要學起來呀!

[@eddie75ism]

應該是利用 震動帶動裡面磁力線圈發電，畢竟led不太高電壓。

[@Lifewithfurrybabies]

谢谢。

[@XRP-Sonic]

NB！！！！！

[@葉榮添-m8x]

什麼鬼教學，亂搞一通！