This text introduces the system’s thinking of design plan and the principle diagram at first, and then elucidates the significance of designing a digital thermometer. In this design, we use the ordinary digital temperature sensor DS18B20 and the MCU AT89C2051 from SCM System, Which has the advantages of high integration level, excellent cost performance and the sufficient supplies ,etc. On the other hand, it is convenient to program with the software Keil uVision2.
This text also gives the analysis of the whole system’s hardware and software design .On the hardware part ,it mostly introduces the power source circuit, sensor circuit, MCU AT89C2051 and periphery control circuit. On the software part, it aims at programming for some idiographic modules and analyzing the whole software part of some SCM. This text also introduces the relevant content about the system’s circuit diagram production, installation and debugging.
Keyword: Digital Thermometer, Single Chip Micyoco, Temperature Sensor, Software Debug