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design of the temperature acquisition module is the application of a sliding rheostat by changing resistor value simulated temperature change ; analog-to-digital conversion module Connection between ADC 0809 chip is used for the conversion module, Acquisition to put the value into voltage simulated digital value; SCM control system through the procedures to judge the value of this size figures, This temperature alarm control module, on the one hand to control the LED-destruction, the other to control the buzzer sounded alarm; Temperature Display Module application of four digital simulation shows that the temperature value. Therefore, this constitutes a simulation of the temperature control system. The system achieved a simulation of temperature from 30 to 60 in the context of a set, showe