"基于单片机的自行车里程表设计与实现"

With the continuous improvement of living standards, bicycles have evolved from being mere transportation or commuting tools to becoming people's first choice for entertainment, leisure, and exercise. Bicycle odometers meet people's most basic needs, allowing them to clearly understand current physical quantities such as speed and distance. This article mainly elaborates on the design of a bicycle odometer based on Hall components. Using the AT89C52 single-chip microcontroller as the core, the A44E Hall sensor measures the revolutions, achieving measurement and statistics of the bicycle's distance/speed. The 24C02 is used to store mileage information when the system loses power, and the mileage and speed of the bicycle can be displayed in real-time using LED. The article provides a detailed introduction to the hardware circuit and software design of the bicycle odometer. The hardware part utilizes Hall elements to input the pulse count of each revolution of the bicycle into the single-chip microcontroller system, which is then processed and displayed. The software part is programmed in assembly language, using a modular design concept. The system's hardware circuit is simple, the subroutines are versatile, and it fully meets the design requirements. Keywords: distance/speed; Hall element; single-chip microcontroller; LED display.