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家里闲置的IT图书派送
2011-7-26 14:31
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模电到底能干嘛用呢?
2010-9-8 17:39
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24V电源用7805转化为5V,发热特别厉害怎么办?
2014-9-11 22:29
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长见识了,原来单片机可以直接驱动继电器——
2008-4-17 16:35
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大家帮我拿个主意
2010-8-19 13:01
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