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📄 《智能电子钟》的制作详细介绍.htm

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style="FONT-SIZE: 16pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman'">《智能电子钟》的制作详细介绍<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></B></P>
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style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">在<SPAN 
lang=EN-US>2002年《电子报》刊登了《智能电子钟》的制作及调校，文中只给出了电路和程序，没有详细介绍制作过程，对于一些初学者有一定的难处。在这里将详细介绍制作过程，并给出修改时间、定时初值的方法、以及添加正点报时功能的方法。<o:p></o:p></SPAN></SPAN></P>
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style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman'">一、设计思想<SPAN 
lang=EN-US><o:p></o:p></SPAN></SPAN></B></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN 
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; 
</SPAN>业余爱好者制作电子产品时最头痛的是PCB的制版，如果电路简单，便可以用万能板搭焊，因此精练电路是电路设计的重点。<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">1：电子钟在生活中非常有用，尤其是多路定时功能。市场上有许多电子钟的专用芯片如：LM8363、LM8365等，但它们功能单一，电路连接复杂。不便于业余爱好者制作！用单片机配合计时软件，可制成功能任意的电子钟，而且可以做到硬件简单、成本低廉。<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US 
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'">2：AT89C2051是性价比很好的单片机，它的I/O吸入电流可以达到20mA，可以直接驱动LED数码管和蜂鸣器；具有2个硬件定时器，非常适合制作电子钟。（管脚排布见图一）<o:p></o:p></SPAN></P>
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