一個普通二極管壓降大約是0.7V，要串，一個就夠了。

來源: 白雲青山於 2016-02-02 12:10:26 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.