Abstract : This paper designs a constant pressure water supply system based on an LPC936 microcontroller, embedding fuzzy control technology, and using a frequency converter to achieve constant pressure water supply. During use, the system operates stably and is an ideal constant pressure control system. Keywords : Microcontroller; Fuzzy control; Constant pressure control; Frequency converter 0 Introduction With the continuous development of a certain school, its water consumption has been increasing. To ensure water quality and conserve resources, it is necessary to implement constant pressure water supply to solve the water problems of the canteen, student dormitories, teaching buildings, laboratory buildings, high-rise staff dormitories, and other facilities on campus. Previously, the school used manually controlled booster pumps to achieve so-called constant pressure water supply, i.e., semi-automatic traditional PID control technology, which was difficult to achieve satisfactory control results and had relatively low efficiency. This paper adopts fuzzy control theory to realize a constant pressure water supply control system. This paper uses the PHILIPS LPC936 microcontroller as the control core, embedding fuzzy control technology. The microcontroller controls the frequency converter through a drive circuit to control the booster pump, thereby achieving constant pressure water supply. 1. System Implementation This system fully utilizes the two 4-channel 8-bit A/D converters/DAC output functions of the LPC936 microcontroller. The system's block diagram is shown in Figure 1. [b][align=center]For details, please click: Design of a Constant Pressure Water Supply System Based on a PHILIPS Microcontroller[/align][/b]