描述
<h2>国民技术N32单片机</h2>
<p><span style="font-family:'黑体';">USB功率计</span></p>
<p><span style="font-family:'方正粗黑宋简体';">立创暑假训练营</span></p>
<p><span style="font-family:'方正粗黑宋简体';">电源指示灯</span></p>
<p><span style="font-family:'方正粗黑宋简体';"><img src="//image.lceda.cn/pullimage/u9L3ZIQBjLYnZcaFsXZ0V8Dk2hAkfVe9vlgA9u3C.png" alt="u9L3ZIQBjLYnZcaFsXZ0V8Dk2hAkfVe9vlgA9u3C.png"></span></p>
<p><span style="font-family:'方正粗黑宋简体';"><img src="//image.lceda.cn/pullimage/BmOO5E5hLfL1lrJpLcFPECnM0SIhTwVX0LYjyMWk.jpeg" width="595" height="446" alt="BmOO5E5hLfL1lrJpLcFPECnM0SIhTwVX0LYjyMWk.jpeg"></span></p>
<p><span style="font-family:'方正粗黑宋简体';">就两个LED，一个3.3V，一个5V</span></p>
<p><span style="font-family:'方正粗黑宋简体';">电压转换</span></p>
<p><span style="font-family:'方正粗黑宋简体';"><img src="//image.lceda.cn/pullimage/6LqUmuARbJdkZ4A5XTpbsyApBXlN7iHIX2fX1lWj.png" alt="6LqUmuARbJdkZ4A5XTpbsyApBXlN7iHIX2fX1lWj.png"></span></p>
<p><span style="font-family:'方正粗黑宋简体';">通过XC6220B331MR-G将输入的5V电压降压到3.3V给单片机和电流检测芯片供电</span></p>
<p> </p>
<h2>电流检测</h2>
<ul><li>INA199</li>
</ul><p><img src="//image.lceda.cn/pullimage/Rv8D7xkfyEkuGmejK5N8a0Aeg5g9y0iSJaGnfyVp.png" width="624" height="306" alt="Rv8D7xkfyEkuGmejK5N8a0Aeg5g9y0iSJaGnfyVp.png"></p>
<p><img src="//" width="759" height="313" alt="watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpbnhpYW9jaQ==,size_16,color_FFFFFF,t_70"></p>
<p><img src="//" width="693" height="623" alt="watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpbnhpYW9jaQ==,size_16,color_FFFFFF,t_70"></p>
<h2>电压检测</h2>
<ul><li>简单的电阻分压</li>
</ul><p><span style="font-size:x-large;">分压一定要注意的是电压一定要<span style="background-color:#e03e2d;">小于3.3V（VADC）</span></span></p>
<p><img src="//image.lceda.cn/pullimage/mmjK5qAZAYuCiezLBeqp5gdHBzoKlSIsT6Kuad17.png" alt="mmjK5qAZAYuCiezLBeqp5gdHBzoKlSIsT6Kuad17.png"></p>
<h2>扩展了UART口可以用来传输数据</h2>
<p> </p>
<p><img src="//image.lceda.cn/pullimage/uGjIKBjaXO7WvbGNJzOfh29nrxfN25V6vFk1Y3cX.jpeg" width="435" height="326" alt="uGjIKBjaXO7WvbGNJzOfh29nrxfN25V6vFk1Y3cX.jpeg"></p>
<p> </p>
<p>原理图里有一个0Ω的电阻作用是隔离GND。</p>
<p>下面的链接讲了0Ω电阻的作用</p>
<p><a href="https://www.bilibili.com/read/cv15681591/" target="_blank">https://www.bilibili.com/read/cv15681591/</a></p>
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