<div> <h3 style="line-height:1.8;">1、项目功能介绍</h3> <p>芯片选用STC89C52RC，P0-P37引脚全部引出，设置VCC和GND方便给设备供电。</p> <p>添加了CH340N用来下载程序。</p> <p>板载资源：</p> <p>1.8位LED</p> <p>2.四位共阳极数码管</p> <p>3.蜂鸣器</p> <p>4.4个独立按键</p> <h3 style="line-height:1.8;">2、项目属性</h3> <hr> <p style="line-height:1.8;">首次公开</p> <h3 style="line-height:1.8;"> 3、开源协议</h3> <hr> <p style="line-height:1.8;">CC BY-NC-SA 4.0</p> <h3 style="line-height:1.8;">4、硬件部分</h3> <hr> <p style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/rNphFmnCNL9KTXHjV3OfXNt13yn9xkqTzviA3QEW.png" alt="rNphFmnCNL9KTXHjV3OfXNt13yn9xkqTzviA3QEW.png"></p> <p style="line-height:1.8;">这里使用Type-B接口，便于焊接。</p> <p style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/hmBA7gYdk5vFwEIdOabiTOQXtXCw9slAcrm9CWsH.png" alt="hmBA7gYdk5vFwEIdOabiTOQXtXCw9slAcrm9CWsH.png"></p> <p style="line-height:1.8;">CH340N USB转串口芯片，外围电路非常简洁。</p> <p style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/wc53uyCBiO1OHylSsWK7KuxCzaFjndQJJtSqRZdJ.png" alt="wc53uyCBiO1OHylSsWK7KuxCzaFjndQJJtSqRZdJ.png"></p> <p style="line-height:1.8;">AMS1117-3.3v降压芯片，虽然MCU是5v供电，但还是预留出3.3v供拓展使用。</p> <p style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/RgwvNPkdRKjIhlI2LI9q4dlPumIYzAd2SDeu80mP.png" alt="RgwvNPkdRKjIhlI2LI9q4dlPumIYzAd2SDeu80mP.png"></p> <p style="line-height:1.8;">8个LED  高电平点亮</p> <p style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/to5C660Jj0JCsBRsKpQXI0sL6JypirXxFZdf0ZXt.png" alt="to5C660Jj0JCsBRsKpQXI0sL6JypirXxFZdf0ZXt.png"></p> <p style="line-height:1.8;">四位共阳极数码管</p> <p style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/GMwUYrxhA9sINls2NPz8UbC5nozOXkh7K2buTmCT.png" alt="GMwUYrxhA9sINls2NPz8UbC5nozOXkh7K2buTmCT.png"></p> <p style="line-height:1.8;">蜂鸣器电路<img src="//image.lceda.cn/pullimage/xPwhajIWjAUX0q5X6t06qxONhiEnGN5bwSQNVV07.png" alt="xPwhajIWjAUX0q5X6t06qxONhiEnGN5bwSQNVV07.png"></p> <p style="line-height:1.8;">独立按键，这里加了电容作为物理消抖。</p> <h3 style="line-height:1.8;">5、BOM清单</h3> <hr> <table width="1440"> <tr> <td width="144" height="19">No.</td> <td width="144">Quantity</td> <td width="144">Designator</td> <td width="144">Value</td> <td width="144">Footprint</td> <td width="144">Primary Category</td> <td width="144">Secondary Category</td> <td width="144">Unique ID</td> <td width="144">Name</td> <td width="144">Symbol</td> </tr> <tr> <td height="19">1</td> <td align="right">1</td> <td>X1</td> <td>12MHz</td> <td>HC-49S_L11.4-W4.8</td> <td>振荡器/谐振器</td> <td>无源晶振</td> <td>gge44</td> <td>12MHz</td> <td>X49SM12MSD2SC</td> </tr> <tr> <td height="19">2</td> <td align="right">2</td> <td>RN1,RN2</td> <td>10kΩ</td> <td>RES-ARRAY-SMD_0603-8P-L3.2-W1.6-BL</td> <td>电阻</td> <td>排阻</td> <td>gge32,gge32_1</td> <td>10kΩ</td> <td>4D03WGJ0103T5E</td> </tr> <tr> <td height="19">3</td> <td align="right">4</td> <td>LED1,R1,R2,SW2</td> <td>22R</td> <td>LED_0805,R0805,SW-TH_SS-12D10G4-G</td> <td>光电器件,按键/开关</td> <td>发光二极管,滑动开关</td> <td>gge5,gge6,gge7,gge8</td> <td>22R,SS-12D10G6-G</td> <td>LED_G,SS-12D10G6-G,电阻</td> </tr> <tr> <td height="19">4</td> <td align="right">4</td> <td>U1,U2,U3,USB1</td> <td> </td> <td>LQFP-44_L10.0-W10.0-P0.80-LS12.0-BL,SOP-8_L4.9-W3.9-P1.27-LS6.0-BL,SOT-223-3_L6.5-W3.4-P2.30-LS7.0-BR,USB-B-TH_USB-B10-BRW</td> <td>单片机/微控制器,电源管理,连接器,通信接口芯片</td> <td>USB转换芯片,USB连接器,单片机(MCU/MPU/SOC),线性稳压器(LDO)</td> <td>gge1,gge2,gge3,gge4</td> <td>AMS1117-3.3,CH340N,STC89C52RC-40I-LQFP44,USB-B10-BRW</td> <td>AMS1117-3.3,CH340N_C2977777,STC89C52RC-40I_C8707,USB-B10-BRW</td> </tr> <tr> <td height="19">5</td> <td align="right">5</td> <td>C1,C2,C3,C4,C14</td> <td>100nF</td> <td>C0805</td> <td> </td> <td> </td> <td>gge10,gge11,gge12,gge13,gge67</td> <td>100nF</td> <td>Capacitance</td> </tr> <tr> <td height="19">6</td> <td align="right">6</td> <td>BUZZER1,LED10,Q1,Q2,Q3,Q4</td> <td>2.7kHz</td> <td>BUZ-TH_BD9.0-P4.00-D0.6-FD,LED-SEG-TH_FJ5461AH,S8050_SOT-23</td> <td>显示屏,晶体管,音频器件/振动马达</td> <td>LED数码管,三极管(BJT),蜂鸣器</td> <td>gge34,gge35,gge36,gge38,gge40,gge42</td> <td>2.7kHz,FJ5461BH 纯红</td> <td>FJ5461BH-pure-red,NPN,QMB-09B-03</td> </tr> <tr> <td height="19">7</td> <td align="right">16</td> <td>C5,C6,C9,C10,C11,C12,C13,C15,LED2,LED3,LED4,LED5,LED6,LED7,LED8,LED9</td> <td>10uF</td> <td>C0805,LED_0805</td> <td>光电器件</td> <td>发光二极管</td> <td>gge14,gge15,gge16,gge17,gge18,gge19,gge25,gge26,gge29,gge30,gge51,gge55,gge58,gge60,gge62,gge66</td> <td>10uF</td> <td>Capacitance,LED_B</td> </tr> <tr> <td height="19">8</td> <td align="right">18</td> <td>C7,C8,D1,H1,H3,H4,H5,H6,Q5,SCREW1,SCREW2,SCREW3,SCREW4,SW3,SW4,SW5,SW6,SW7</td> <td>47pf</td> <td>C0805,HDR-TH_6P-P2.54-V-R2-C3-S2.54_A2541WV-2X3P,HDR-TH_8P-P2.54-V-M,HDR-TH_10P-P2.54-V-M-1,M3螺丝,S8050_SOT-23,SMA_L4.3-W2.6-LS5.0-FD,SW-SMD_L6.0-W3.3-LS8.0</td> <td>二极管,按键/开关,晶体管,连接器</td> <td>三极管(BJT),排针,肖特基二极管,轻触开关</td> <td>gge45,gge46,gge47,gge48,gge53,gge56,gge59,gge64,gge65,gge68,gge70,gge71,gge72,gge73,gge74,gge75,gge76,gge77</td> <td>47pf,SS54,TS-1101-C-W</td> <td>Capacitance,HDR-M-2.54_2x3,Header-Male-2.54_1x8,Header-Male-2.54_1x10,NPN,SS54_C7420369,TS-1101-C-W,螺丝孔</td> </tr> <tr> <td height="19">9</td> <td align="right">20</td> <td>R3,R4,R5,R6,R7,R8,R9,R10,R11,R12,R13,R14,R15,R16,R17,R18,R19,R20,R21,R22</td> <td>10K</td> <td>R0805</td> <td> </td> <td> </td> <td>gge9,gge20,gge21,gge22,gge23,gge24,gge27,gge28,gge31,gge37,gge39,gge41,gge43,gge49,gge50,gge52,gge54,gge57,gge61,gge63</td> <td>10K</td> <td>电阻</td> </tr> </table> <h3 style="line-height:1.8;">6、大赛LOGO验证</h3> <hr> <p style="line-height:1.8;"><img src="//image.lceda.cn/pullimage/kMjGusf4rBjr6l6Fsrf5OXCqyq92kB2tRIPpU0NL.jpeg" alt="kMjGusf4rBjr6l6Fsrf5OXCqyq92kB2tRIPpU0NL.jpeg"><img src="//image.lceda.cn/pullimage/OIT5jrCAfSWiOxfoi1kwwSOvTiuHmPrHAnQEmRzs.jpeg" alt="OIT5jrCAfSWiOxfoi1kwwSOvTiuHmPrHAnQEmRzs.jpeg"></p> <h3 style="line-height:1.8;">7、演示您的项目并录制成视频上传</h3> <hr> <p style="line-height:1.8;"> </p> </div>