This topic is the digital thermometer's design. Mainly through the 18B20 data acquisition, carries on processing to the data, hands over demonstrated by the demonstration part. With the protel software plan schematic diagram and the PCB chart, realizes the entire electric circuit's function using the monolithic integrated circuit C language programming, with Keil the uVision2 software programming debugging routine, realizes the digital thermometer's function. This thermometer digital measurement temper range for -55°C~+125°C, in -10~+85°C scope, precision for ±0.5°C.
The this topic design mainly makes the demonstration by 1602 liquid crystal modules, at89S5 monolithic integrated circuit module makes the programmed control, DS18B20 makes the temperature sensing module chip, realizes the digital temperature measurement.
This design introduced the digital thermometer and the traditional thermometer compares, has the reading to be convenient, the temperature measurement scope is broad, the temperature measurement is accurate, its output temperature uses the digit to demonstrate, mainly uses to the temperature measurement quite accurate place or the scientific research laboratory use.
Keywords: Protel, Monolithic machine C language, Keil uVision2, Figure thermometer
