描述
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<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">* 1、项目功能介绍</h3>
<hr class="horizontal-splitline normal-bold-2"><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">基于PAM8403、RDA5807、STM32F030F4芯片的DIY收音机，可驱动3W喇叭，支持双声道音量输出，收音机支持频率为87Mhz至108Mhz。</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p>
<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">*2、项目属性</h3>
<hr class="horizontal-splitline normal-bold-2"><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">用于收听广播</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p>
<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">* 3、开源协议</h3>
<hr class="horizontal-splitline normal-bold-2"><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">GPL3.0开源协议</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"> </p>
<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">*4、硬件部分</h3>
<hr class="horizontal-splitline normal-bold-2"><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong>1.FM调频芯片：</strong></p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">采用了国产芯片RDA5807,根据数据手册上的应用电路绘制的原理图，验证成功了。RDA5807芯片上与MCU采用IIC协议进行通信，芯片内部有十个寄存器。</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">注：L1与L2为100Mhz的磁珠</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/fApCiFQSuh5BjNTuT0JdPpWrFnIZtA0cHyEIJxfn.jpeg" alt=""><strong>2.功放芯片：</strong></p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">功放芯片采用PAM8403，考虑到收音机音量的不能太大，选择了4欧 3W的喇叭，配合PAM8403可以完成全额输出。<br><img src="//image.lceda.cn/pullimage/YSIpgxrVltcu44tpMy61AJohYjFGVhJrl08YFyvR.jpeg" alt=""><strong>3.显示部分：</strong></p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">数码管驱动芯片TM1620，驱动0.56寸共阴数码管。板子上的MCU为STM32F030F4,控制数码管驱动芯片TM1620与FM调频芯片RDA5807。<strong><br><img src="//image.lceda.cn/pullimage/luaUEdgXXf6m2DxpWJZVBLRRIFsg4yCTq0pxCbo4.jpeg" alt=""></strong><strong>4.天线部分：</strong></p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">天线部分绘制了两种接口，上面的接口为IPEX接口，下面接口为3.5M接口，可以插天线或者线长大于20CM的耳机。天线的长度越长，FM调制的效果就越好。也可以在R5的左侧焊接一根长度超过20cm的铜线充当天线。</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><strong><img src="//image.lceda.cn/pullimage/5QMfWyxmqs27fbyMA0tPgfjLmHrzOVvm3dHnzJpr.jpeg" alt="" width="386" height="459"><img src="//image.lceda.cn/pullimage/VIvhAbxBsOYspgR6VT1VtquZLVaOLrmhoEGDsS1E.jpeg" alt="" width="381" height="381"></strong></p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;"> </p>
<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">5、软件说明</h3>
<hr class="horizontal-splitline normal-bold-2"><p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;">1、上电后默认为87.0Mhz，音量大小为4。音量最多可调16级大小。</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;">2、按键1为减少0.1Mhz，按键2为增加0.1Mhz。按键长按1秒以上，会快速自增自减。</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/iGf6yTpvo55Ku5eep5VKfn6ZgkGo8iBPZjlhz304.jpeg" alt=""></p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;">3、快速双击按键1，数码管进入音量设置界面。按键1为减少1级，按键2为增加1级。再次快速双击按键1，返回调频设置界面。</p>
<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/x5HdBa5JVf8x6oL39CZkNNr4LjhwJ1AU9VhEP32O.jpeg" alt=""></h3>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height:1.8;"> </p>
<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height:1.8;">6、演示视频</h3>
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