<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"> <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;">1）.使用瑞萨的R7FA2E1A72DFL作为主控芯片。</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/FbCTRHPVDZhshe7MjQUDfgzGyNlTzZui3KuVAaZ5.png" alt="" width="400" height="300"></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;">2）.使用四位数码管作为显示时间的元件，此处的数码管为共阴极。</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/zzPLuOBiupbdsJREGMvPt1Mnz6k2oTn3xHxC6Flj.png" alt="" width="400" height="339"></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;">3）.使用无源蜂鸣器作为闹铃，并将之连接在可输出PWM的引脚上，通过改变PWM，可以组成一首音乐；并将此音乐作为闹钟铃声。</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/k32x7ujL1JRGjvvToMosxGLTzDHAwGiM0lYAzy19.png" alt="" width="400" height="465"></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;">4）.使用DHT11作为温度传感器，通过这个传感器可以获得外界温度，并通过四位数码管显示。</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/tMnfdOT22ON13xAjgyXShmt9WpWVkMFuoKkUItJU.png" alt="" width="400" height="577"></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;">5）.按键模块，通过按下按键触发事件，可以实现闹钟的时间调节，温度查看，闹钟设定和闹铃音乐选择功能。</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/W5savRRlbBylN5JH98b9TjlvUrasK9GQhtX8XGuh.png" alt="" width="400" height="350"></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;">并且通过在按键底下放置RGB灯，同时PCB开窗不铺铜（禁止区域设置为禁止铺铜，同时叠加填充区域，填充对应的顶或底层阻焊层），可以实现透光效果；当有按键按下时会实现炫酷的亮灯效果。</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/vPJw2K81N2zWptKa8bLdOv7bxkTZRPX8sVahnGlG.png" alt="" width="400" height="75">6）.触摸模块，R7FA2E1A72DFL主控芯片是带有触摸功能的，在触摸线上加入560欧的阻尼电容以及适当的电容来稳定触摸信号，其实足够灵敏和准确。</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/kB7pOjHqgee4OgKIWuXrVKCzzbSGKDGe08UP6pO5.png" alt="" width="400" height="211"></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;">但是触摸模块对信号的抗干扰能力弱，所以要隔离开。</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/XzBoOSBTF1KWsZE6Ku5Y3OXDTnWcSuMqLFNHDCvb.png" alt="" width="200" height="202"></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> </div>