Intellective Applied Thermometer Design Based on DS1420

Abstract: The AT89S52 SCM is the core of the entire system. The system includes temperature sensor module , data collection module, data processing module, keyboard number tube module, voice module and LCD display module. In order to ensure the accuracy of sampling, it

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uses the temperature sensor ‘s good performance to achieve the temperature and voltage tranormation, and high-precision OP amplifier and then 12 bits samples. Later through a sequence of software operation , system realize the alarm temperature pre-sets , LCD/ LED display , voice playback and other functions to achieve human-computer interaction .
Key words: DS1420 application; scheme design; flow chart design; circuit; intellective thermometer.