The design is based on the AT89C52 single chip computer as the core, combined with the single line digital temperature sensor DS18B20 and the liquid crystal display 12864, a design of digital, intelligent water heater control system. The system consists of a main control chip module, DS18B20 temperature detection module, LCD display module, the water level detection module, keyboard control module, the alarm module and the solenoid valve control module. Given to the structure of each module and its working principle, system hardware principle diagram, the program flow chart and some source code, and theoretical design of physical production. The need for manual waiting and excess water overflow problem of this system is to lift the water heater, the time-saving, environmental protection, and the purpose of saving water. Mechanical control system compared with the traditional, has the advantages of simple structure, strong anti-interference ability, easy to use and so on.

Automatic control water level.c

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