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【教訓】當C51單片機I/O口與NPN三極體基極相連時,最好在基極上接5k歐上拉電阻(不能太小)。
Floor 1
巨大八爪鱼
8/10/13 19:06
這是我通過做c51單片機與共陰數碼管連接所得到的啟示
Floor 2
巨大八爪鱼
8/10/13 19:06
現在可以解決紅外發射管發不遠的問題了。只需要在NPN三極體上的基極上加上拉電阻就行了
Floor 3
巨大八爪鱼
7/4/16 12:33
這個問題主要是因為51單片機的I/O口在輸出高電平時必須接上拉電阻。
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