<div class="document"> <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"><span style="color:#b96ad9;">桌面小功放</span><br><ul><li 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;"><span style="color:#b96ad9;">采用3.5mm音频输入 </span></li> <li 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;"><span style="color:#b96ad9;">NE5532前级放大 TPA3118后级放大</span></li> <li 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;"><span style="color:#b96ad9;">后级输出配有XD3915音频灯 </span></li> <li 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;"><span style="color:#b96ad9;">前级可切换成NE555电子琴 </span></li> <li 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;"><span style="color:#b96ad9;">供电采用ch224k诱骗12V</span></li> </ul><p><span style="color:#b96ad9;">平时可以插3.5mm当小音响使，也可以当小电子琴用，比较便携。</span></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"><span style="color:#000000;font-size:16px;">项目是首次公开；项目是原创；项目没有曾经在其他比赛中获奖；项目没有在学校参加过答辩。</span> <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;"> </h3> <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"><span style="color:#000000;font-size:16px;">GPL3.0</span> <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;"><span style="color:#2dc26b;">音频信号可以用万用表交流档测试 （手机输出0.5V左右 经过运放 达到1.5V左右）</span></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;"><span style="color:#2dc26b;">如果前级正常 后级没输出 可以检查芯片是否焊好</span></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;"><span style="color:#b96ad9;">TPA3118 空载输入3V 输出6V 如果配合音频灯 最好电压范围是6~VBUSV （否则会有灯常亮）</span></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;"><span style="color:#3598db;">18W充电器供电不够 不能同时启动电子琴和运放 （会反复申请12V）</span></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;"><span style="color:#3598db;">底噪有些大 碰到开关 电位器 都会引起很大干扰</span></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;"><span style="color:#3598db;">在启动后 如果输出电流很大 会掉电成5V并重新申请12V</span></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;"><span style="color:#3598db;">VBUS用9V 应该会好一点</span></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> <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;"><span style="font-size:24px;">下面是实物图</span></p> <br><table style="border-collapse:collapse;width:47.1679%;height:286px;margin-left:auto;margin-right:auto;"><tr><td style="width:47.0213%;"> <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 style="margin-left:auto;margin-right:auto;" src="//image.lceda.cn/pullimage/D3QsjZRUlWcNbHa2tN4uWgqlkfpT7xZxtKJ8MZiE.jpeg" alt="" width="411" height="287"></p> </td> <td style="width:51.2263%;"><img src="//image.lceda.cn/pullimage/U7GwlWZ3OcH84yDSacFWo197r3yKDWKe6qAbwtqH.jpeg" alt="" width="447" height="292"></td> </tr></table><table style="border-collapse:collapse;width:41.7755%;height:166px;margin-left:auto;margin-right:auto;"><tr><td style="width:49.1238%;"><img style="margin-left:auto;margin-right:auto;" src="//image.lceda.cn/pullimage/qoW2rBsxs4GxdFRNEBu7Z72j87Mp3TchePsiqJ97.jpeg" alt="" width="339" height="309"></td> <td style="width:49.1238%;"><img src="//image.lceda.cn/pullimage/FdtTQ3UwwcOttU2xcrzmvptI7wWzCB8Sch6loUGc.jpeg" alt="" width="336" height="306"></td> </tr><tr><td style="width:49.1238%;text-align:center;"><img style="margin-left:auto;margin-right:auto;" src="//image.lceda.cn/pullimage/EYtccMrZpKp2cJsIm77Mhdb6Fy9ykwbcJL2cCcub.jpeg" alt="" width="337" height="307"></td> <td style="width:49.1238%;"> <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/3Jo5rDGsGwN1kk9AQ267Fjnk5URvHnmTOXseVO3g.jpeg" alt="" width="316" height="316"></p> </td> </tr></table><br><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> <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> <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> <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;"><span style="color:#95a5a6;font-size:14px;">无</span></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;">*6、BOM清单</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;"><span style="color:#95a5a6;font-size:14px;"> </span></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 style="margin-left:auto;margin-right:auto;" src="//image.lceda.cn/pullimage/OVdL6QxPOkn0pSJSVUEKjMKGNyrL9wf9Lwh4HXcB.png" alt="" width="627" height="435"></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 style="margin-left:auto;margin-right:auto;" src="//image.lceda.cn/pullimage/OH6eikHCLOlnnFbxbXcqbaszxWGhCpKRjP50chiP.png" alt="" width="623" height="243"></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;">CH224K 电位器都是淘宝买的</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;">*7、大赛LOGO验证</h3> <hr class="horizontal-splitline normal-bold-2"><p style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/j8ifjM5U6VtW3SAs3HPXQLW2aJIgq6BWPk2vOszt.png" alt="" width="701" height="593"></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;">* 8、演示您的项目并录制成视频上传</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;"><span style="color:#f1c40f;font-size:14px;">立创电赛：《桌面小功放》-功放功能演示</span></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;"><span style="color:#f1c40f;font-size:14px;">立创电赛：《桌面小功放》-电子琴功能演示</span></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> <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;"><span style="color:#f1c40f;">【桌面小功放-哔哩哔哩】https://b23.tv/ojMQY7</span></p> </div>