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1、 电子CAD课程设计要求一、课程设计的目的1、 熟悉原理图的设计步骤2、 绘制原理图的方法3、 网络表及元件清单的生成4、 双面印制电路板（PCB）的布线流程5、 原理图元件库及其PCB元件库的创建二、课程设计内容和要求1、画原理图2、设计双面印制电路板3、原理图元件库及其PCB元件库的创建三、原理图:步骤:1、设置图纸大小2、设置环境3、放置元件4、原理图布线5、语法检查，不断修改，直到没有错误6、材料清单和网络表生成，为PCB做准备四、PCB图：步骤：1、 设置PCB图大小2、设置PCB环境2、 完成布线五、设计内容：数字电子钟图1数字电子钟整体电路（方块图）图2秒脉冲电路图3计数电路图4
2、显示译码驱动电路图5LED数码显示电路图6报时电路图7校时电路图8电路材料报表元器件详细报表Part Cross Reference Report For : Clock.xrf 28-May-2009 02:22:13Designator Component Library Reference Sheet-C1 22pF maichong.SchC2 50pF maichong.SchDS1 DPY_7-SEG xianshi.SchDS2 DPY_7-SEG xianshi.SchDS3 DPY_7-SEG xianshi.SchDS4 DPY_7-SEG xianshi.SchDS5 D
3、PY_7-SEG xianshi.SchDS6 DPY_7-SEG xianshi.SchLS1 SPEAKER baoshi.SchQ1 NPN baoshi.SchR1 2kOhm jiaoshi.SchR2 2kOhm jiaoshi.SchR3 2kOhm jiaoshi.SchR4 2kOhm baoshi.SchR5 10MOhm maichong.SchRP1 200Ohm7 qudong.SchRP2 200Ohm7 qudong.SchRP3 200Ohm7 qudong.SchRP4 200Ohm7 qudong.SchRP5 200Ohm7 qudong.SchRP6 2
4、00Ohm7 qudong.SchS1 SW-PB jiaoshi.SchS2 SW-PB jiaoshi.SchS3 SW-PB jiaoshi.SchU1A 74LS74 jiaoshi.SchU2A 4069 jiaoshi.SchU3A 4011 jiaoshi.SchU3B 4011 jiaoshi.SchU3C 4011 jiaoshi.SchU3D 4011 jiaoshi.SchU4D 4011 jiaoshi.SchU4C 4011 jiaoshi.SchU4B 4011 jiaoshi.SchU4A 4011 jiaoshi.SchU5A 4011 jiaoshi.SchU
5、6 4511 qudong.SchU7 4511 qudong.SchU8 4511 qudong.SchU9 4511 qudong.SchU10 4511 qudong.SchU11 4511 qudong.SchU12A 4023 baoshi.SchU13A 4069 baoshi.SchU13B 4069 baoshi.SchU13C 4069 baoshi.SchU14A 4012 baoshi.SchU14B 4012 baoshi.SchU15A 4011 baoshi.SchU16A 4011 jishi.SchU16B 4011 jishi.SchU16C 4011 jis
6、hi.SchU16D 4011 jishi.SchU17A 4518 jishi.SchU17B 4518 jishi.SchU18A 4518 jishi.SchU18B 4518 jishi.SchU19A 4518 jishi.SchU19B 4518 jishi.SchU20 4060 maichong.SchU21A 74LS74 maichong.SchU41A 4012 baoshi.SchV1 +5V jiaoshi.SchV2 +5V qudong.SchV3 +5V jishi.SchX1 32768Hz maichong.Sch网络表13C1rad0.322pFC2RAD
7、0.350pFDS1DIP8DPY_7-SEGDS2DIP8DPY_7-SEGDS3DIP8DPY_7-SEGDS4DIP8DPY_7-SEGDS5DIP8DPY_7-SEGDS6DIP8DPY_7-SEGLS1RAD0.3SPEAKERQ1TO-18NPNR1axial0.52kOhmR2axial0.52kOhmR3axial0.52kOhmR4axial0.52kOhmR5axial0.510MOhmRP1DIP14200Ohm-7RP2DIP14200Ohm-7RP3DIP14200Ohm-7RP4DIP14200Ohm-7RP5DIP14200Ohm-7RP6DIP14200Ohm-
8、7S1RAD0.3SW-PBS2RAD0.3SW-PBS3RAD0.3SW-PBU1DIP1474LS74U2DIP144069U3DIP144011U4DIP144011U5DIP144011U6DIP164511U7DIP164511U8DIP164511U9DIP164511U10DIP164511U11DIP164511U12DIP144023U13DIP144069U14DIP144012U15DIP144011U16dip164011U17dip164518U18dip164518U19dip164518U20dip164060U21dip1474LS74U41DIP144012X1XTAL132768Hz(1HZU4-12U21-5)(2HZS1-1S2-1U4-9U20-3
