利用实验仪上的D/A变换电路，输出-8V至+8V电压，控制直流电机。改变输出电压值，改变电机转速。用8051的定时器0生成单位时间，由定时器/计数器1对单位时间内的脉冲计数，计算电机转速。参考数码管实验，将电机的实际转速在数码管上显示出来。-Experimental apparatus on the D/A converter output voltage of-8V to+8 V, control DC motor. Change the output voltage to change th

采用labview编写的电机转速计算器，输入轮胎直径 、减速比、要求车速，输出所需电机转速(Written by LabVIEW motor speed calculator, enter the tire diameter, speed reduction ratio, speed requirements, the output motor speed required)