目录
摘要....................................................................2
目录....................................................................3
1.1 课题研究的目的意义............................................4
1.1.1 设计目的.......................................................................................................................4
1.1.2 设计的意义...................................................................................................................4
1.2 主要内容及方法手段............................................5
1.2.1 主要内容.......................................................................................................................5
1.2.2 方法手段.......................................................................................................................5
2具体电路设计........................................................6
2.1 系统设计原理....................................................6
2.2 单片机的最小系统...............................................6
2.2.1 电源...............................................................................................................................6
2.2.2 复位电路.......................................................................................................................8
2.2.3 晶体...............................................................................................................................8
2.3 PWM波调速....................................................9
2.3.1 直流电机PWM的调速原理..........................................................................................9
2.3.2 Timer-A实现PWM......................................................................................................10
2.4 电机驱动电路..................................................10
2.4.1 电气隔离电路.............................................................................................................10
2.4.2 驱动电路......................................................................................................................11
2.5 LED显示.......................................................12
2.6 测速电路.......................................................14
3总结..................................................................1
3.1 总结..............................................................1