Design of the humiture monitor system for small grain depot

The humiture monitor system for small grain depot based on AT89C52 can measure the humiture by temperature and humidity sensor. Through compare the detection value and setting value, the system can control the LED to light, then the staffs operate the temperature and humidity reduction equipments to control the temperature and humidity to the setting value. The system design include hardware and software, and the hardware design is composed of temperature measure circuit, humidity measure circuit, A/D converter, AT89C52, display circuit and alarm circuit.