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         <h1 style="margin: 0px 0px 0px 3px; font-size: 1.5em;"><a href="http://forum.falinux.com/zbxe/index.php?document_srl=783056" style="color: #000000; text-decoration-line: none;" target="_blank">Tact Switch Power On/Off Latch</a></h1>
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         <div class="author" style="color: #3074a5;"><span class="member_92">장형기</span></div>
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      <div class="date" title="등록일" style="float: right; background: url(&quot;../images/common/calendar.gif&quot;) left top no-repeat; padding-left: 18px; margin-left: 10px;"><strong>2013.10.24</strong>&nbsp;22:25:14 (*.52.177.249)</div>
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         <p class="MsoNormal"><span lang="EN-US">Tact Switch</span>를 이용한<span lang="EN-US">&nbsp;Power On/Off 를 Latch&nbsp;</span>하는 회로입니다.</p>
         <p class="MsoNormal">이 회로도는 EEVBLOG(<a href="http://www.eevblog.com/" style="color: #4070aa; text-decoration-line: none; line-height: 1.5;" target="_blank">http://www.eevblog.com/</a>)<span style="line-height: 1.5;">에 올라와 있는 회로도를 가지고 실험한 것입니다.</span></p>
         <p class="MsoNormal"><br /></p>
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         <p class="MsoNormal"><img src="http://forum.falinux.com/zbxe/files/attach/images/406792/056/783/5e3cece945ce220147721129058fd930.jpg" alt="회로1.jpg" width="370" rel="xe_gallery" style="border-width: 0px; max-width: 100%; height: auto; cursor: pointer;" />&nbsp;<br /></p>
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         <p class="MsoNormal"><span lang="EN-US">위 회로도는 SW1 Tact Switch(ON)&nbsp;</span>를 누르면<span lang="EN-US">&nbsp;Q1</span>이<span lang="EN-US">&nbsp;Turn On&nbsp;</span>되어 전원이 공급되면 Q2가 Turn On 되어 전원 공급을 유지합니다.</p>
         <p class="MsoNormal"><span lang="EN-US">SW2 Tact Switch(OFF)&nbsp;</span>를 누르면<span lang="EN-US">&nbsp;Q2가</span><span lang="EN-US">&nbsp;Turn Off&nbsp;</span>되고, &nbsp;Q1이&nbsp;<span style="line-height: 1.5;">Turn Off 되어&nbsp;</span><span style="line-height: 1.5;">전원 공급을 차단합니다.</span></p>
         <p class="MsoNormal"><span lang="EN-US"><br /></span></p>
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         <p class="MsoNormal"><img src="http://forum.falinux.com/zbxe/files/attach/images/406792/056/783/539b0ad48b1b652842a542908ba881c2.jpg" alt="회로2.jpg" width="481" rel="xe_gallery" style="border-width: 0px; max-width: 100%; height: auto;" />&nbsp;<br /></p>
         <p class="MsoNormal"><span lang="EN-US">&nbsp;</span></p>
         <p class="MsoNormal"><span lang="EN-US">위 회로도는&nbsp;<span lang="EN-US" style="line-height: 1.5;">MOSFET</span><span style="line-height: 1.5;">를 사용할 경우</span><span lang="EN-US" style="line-height: 1.5;">&nbsp;SW4 Tact Switch(ON)&nbsp;</span><span style="line-height: 1.5;">를 누르면</span><span lang="EN-US" style="line-height: 1.5;">&nbsp;Q7&nbsp;</span><span style="line-height: 1.5;">이</span><span lang="EN-US" style="line-height: 1.5;">&nbsp;Turn On&nbsp;</span><span style="line-height: 1.5;">되고</span><span lang="EN-US" style="line-height: 1.5;">, Q5 가</span><span lang="EN-US" style="line-height: 1.5;">&nbsp;Turn On&nbsp;</span><span style="line-height: 1.5;">되어 전원이 공급됩니다.</span></span></p>
         <p class="MsoNormal"><span lang="EN-US"><span lang="EN-US" style="line-height: 1.5;">SW5 Tact Switch(OFF)&nbsp;</span><span style="line-height: 1.5;">를 누르면</span><span lang="EN-US" style="line-height: 1.5;">&nbsp;Q7&nbsp;</span><span style="line-height: 1.5;">이</span><span lang="EN-US" style="line-height: 1.5;">&nbsp;Turn Off&nbsp;</span><span style="line-height: 1.5;">되고</span><span lang="EN-US" style="line-height: 1.5;">, Q5 가</span><span lang="EN-US" style="line-height: 1.5;">&nbsp;Turn Off&nbsp;</span><span style="line-height: 1.5;">되어 전원 공급이 차단됩니다.</span></span></p>
         <p class="MsoNormal"><span lang="EN-US">&nbsp;</span></p>
         <p class="MsoNormal"><span lang="EN-US"><br /></span></p>
         <p class="MsoNormal"><span lang="EN-US"><br /></span></p>
         <p class="MsoNormal"><span lang="EN-US"><img src="http://forum.falinux.com/zbxe/files/attach/images/406792/056/783/ca22a0b55cfe3674e63d04a3e64c279d.jpg" alt="회로3.jpg" width="521" rel="xe_gallery" style="border-width: 0px; max-width: 100%; height: auto;" />&nbsp;<br /></span></p>
         <p class="MsoNormal"><span style="line-height: 1.5;">&nbsp;</span></p>
         <p class="MsoNormal"><span lang="EN-US">위 회로도는&nbsp;<span lang="EN-US" style="line-height: 1.5;">MOSFET</span><span style="line-height: 1.5;">를 사용한 다른 방법으로 하나의 스위치로</span><span lang="EN-US" style="line-height: 1.5;">&nbsp;ON/OFF</span><span style="line-height: 1.5;">를 할 경우에는 위의 회로도를 사용합니다.</span></span></p>
         <p class="MsoNormal"><span lang="EN-US"><span style="line-height: 1.5;">이 회로도는</span><span lang="EN-US" style="line-height: 1.5;">&nbsp;C1</span><span style="line-height: 1.5;">의 콘덴서값 또는 R4 의 저항값에 따라서 스위치의 채터링 방지 및</span><span lang="EN-US" style="line-height: 1.5;">&nbsp;ON/OFF</span><span style="line-height: 1.5;">의 딜레이 시간을 설정할 수 있습니다.</span></span></p>
         <p class="MsoNormal"><span lang="EN-US"><br /></span></p>
         <p class="MsoNormal"><span lang="EN-US"><br /></span></p>
         <p class="MsoNormal"><span lang="EN-US">실험 결과 만족할 만한 수준의 성능은 나오지 않습니다. 가끔 오동작을 하는 경우도 발생하는 것 같습니다.</span></p>
         <p class="MsoNormal"><span style="line-height: 1.5;">좀더 수정 보안이 필요할 것 같습니다.</span></p>
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