Low-Cost Ultrasonic Multi-function Ranging System Based on Single Chip Microcomputer

This paper introduces a simple low-cost ultrasonic ranging method controlled by a single chip microcomputer. We use 51 micro controllers and HC-SR04 to achieve distance measurement. We give the hardware device connection scheme, complete the software and hardware design and simulation. The range finder system we designed can accurately show the number. Able to give a beep alarm and LED flash at close range. We can display the measurement distance and threshold distance with a nibble tube or LCD1602. The simple scheme implemented in this paper can be used in large-scale experimental teaching equipment, car reversing radar, vehicle alarm and other scenarios.