基于Arduino的超声波距离检测，温度检测，蜂鸣器报警系统，用于汽车倒车防撞。-Ultrasonic distance detection, temperature detection, buzzer alarm system Arduino-based, for car reversing crash.

停车场系统，能对车辆进出停车场情况进行记录，当车辆出停车场时会进行收费(The parking system can record the situation of the vehicle in and out of the parking lot, and the vehicle will be charged when the car is out of the parking lot.)