【简答题】设计一步运转控制机,分别以四只输出指示灯代表 A 、 B 、 C 、 D 绕组。 要求:上电自动启动,输出绕组按每秒一步的速率得电,顺序为 A → AB → B → BC → C → CD → D → DA 循环;当任何时刻按下停止信号能停止运行,且锁相(既以停止时刻的输出长得点)。 2、 设计一小车自动控制电路程序,要求如下: n 按下自动 / 手动开关,小车自动运行,上电小车停于 A 点, A...
【简答题】During your first trip, keep reminding yourself that you can __1___ there many times. Don’t stress over trying to see ___2__ on your first trip. Enjoy what you are able to do and realize that the th...