Designed of The Digital Thermometer Which Is Based on The MCS-51 Series Monolithic Integrated Circuit
Abstract:The core of the control circuit of the digital thermometer is centered on the 8 bits monolithic integrated circuit AT89C2051 in MCS-51 series in ATMEL Corporation. The sensor which measures temperature adopts the DS18B20 which is the single lined numeral temperature sensor. The temperature sensor is provided with the function of the A/D, therefore it is directly connect with the monolithic integrated circuit without the special-purpose A/D switching circuit. Output signal, the system demonstration realizes the function of the five LED serial dynamic demonstrations, through the output signals of 74LS138 drives the bits of LED and the output signals of 74LS164 drives the sections of LED. This digital thermometer has realized the function of which temperature gathering, data processing, the real timing display.
Key words: AT89C2051;DS18B20;74LS138;74LS164