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 <title><![CDATA[手动脉冲发生器]]></title>
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 <description><![CDATA[手动脉冲发生器是产生两路相位差为90度的脉冲，供计数器加减，经运算后发出指令脉冲使步进电机正转或者反转。不能直接驱动步进电机。驱动步进电机需功率输出放大板。]]></description>
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 <author><![CDATA[znz43]]></author>
 <category><![CDATA[程序样例]]></category>
 <pubdate><![CDATA[Fri, 02 Sep 2011 09:31:59 +0000]]></pubdate>
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