Digital thermometer and the temperature sensor using the AD590 integrated circuit performs the interface temperature is measured and converted into an alog voltage signal into a digital signal that can be processed by the microcontroller analog to digital converter ADC0804, and then sent to the microcontroller for processing AT89S52 transformation temperature finally value displayed on the D4, D3, D2, D1 of four seven-segment LED display. System AT89S52 microcontroller core, plus AD590 temperature measurement circuit, ADC analog-digital conversion circuits, four temperature data show circuit and the external power supply, the clock circuit.

数字温度计.doc

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