Digital thermometers can accurately judge and measure temperature, displayed in numbers instead of pointer or mercury display.Therefore, it is called a digital thermometer or digital temperature table.
The application of digital thermometer
In general, the digital thermometer does not need to adjust the potentiometer.The normal measurement period is about 4 seconds, and the temperature is about 23 seconds.This digital thermometer uses a intermittent measurement method to reduce power consumption. Its power consumption is only about 10 μA when not measured, and the two 3V lithium batteries can be used for two years.
Digital temperature meter calibration
Calibration method: The comparison method can be adopted at zero -point calibration, or the fixed -point method can also be adopted.
Digital temperature meter design
Two schemes: Plan 1 based on thermal resistance -based thermometer design scheme 2 based on DS18B20 digital thermometer design
Digital thermometer principle
The display circuit is composed of a dynamic display control circuit, power supply -drive circuit and data bus. The four -digit tube display circuit adopts a common anode connection method.The basis of the triode 8550 is low. The triode is turned on. The corresponding digital tube dynamic work. The data shows that the content of the single -chip machine is transmitted to the digital pipe through the bus P1.0 ~ P1.7.
Digital thermometer price

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