The design describes the course of development of the water heater and the MCU intelligent control water heater principle, to design a microcontroller-based electric water heater intelligent temperature control device. Device AT89S51 microcontroller technology as the core temperature values obtained from the DS18B20 processing temperature and LCD display. The characteristics of the device: keyboard input to control the upper and lower temperature, and exceeds the upper limit of temperature to stop heating, automatic heating below the lower limit temperature.
Controlling the heating circuit take use of the design of solid-state relays, which enhances the stability of the product, anti-jamming and security.
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