自行车里程表，自动计时测速，按键自动调整-Bicycle odometer, time-speed automatic

自行车里程表，一个毕业设计，采用89C51 采集霍尔传感器脉冲个数，计算速度，卡路里等信息.-Bicycle odometer, a graduate design, using 89C51 acquisition Hall sensor pulse number, the calculation speed, calories and other information.