?? 《智能電子鐘》的制作詳細介紹.htm
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<P class=MsoNormal style="TEXT-ALIGN: center" align=center><B><SPAN
style="FONT-SIZE: 16pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman'">《智能電子鐘》的制作詳細介紹<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN></B></P>
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style="TEXT-INDENT: 31.5pt; mso-char-indent-count: 3.0; mso-char-indent-size: 10.5pt"><SPAN
style="FONT-FAMILY: 宋體; mso-hansi-font-family: 'Times New Roman'">在<SPAN
lang=EN-US>2002年《電子報》刊登了《智能電子鐘》的制作及調校，文中只給出了電路和程序，沒有詳細介紹制作過程，對于一些初學者有一定的難處。在這里將詳細介紹制作過程，并給出修改時間、定時初值的方法、以及添加正點報時功能的方法。<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 14pt; FONT-FAMILY: 宋體; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 'Times New Roman'">一、設計思想<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN></B></P>
<P class=MsoNormal><SPAN lang=EN-US
style="FONT-FAMILY: 宋體; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-spacerun: yes">
</SPAN>業余愛好者制作電子產品時最頭痛的是PCB的制版，如果電路簡單，便可以用萬能板搭焊，因此精練電路是電路設計的重點。<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US
style="FONT-FAMILY: 宋體; mso-hansi-font-family: 'Times New Roman'">1：電子鐘在生活中非常有用，尤其是多路定時功能。市場上有許多電子鐘的專用芯片如：LM8363、LM8365等，但它們功能單一，電路連接復雜。不便于業余愛好者制作！用單片機配合計時軟件，可制成功能任意的電子鐘，而且可以做到硬件簡單、成本低廉。<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US
style="FONT-FAMILY: 宋體; mso-hansi-font-family: 'Times New Roman'">2：AT89C2051是性價比很好的單片機，它的I/O吸入電流可以達到20mA，可以直接驅動LED數碼管和蜂鳴器；具有2個硬件定時器，非常適合制作電子鐘。（管腳排布見圖一）<o:p></o:p></SPAN></P>
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