摘要
介绍一种数字温度计的设计制作方案。通过采用LM94022作为温度传感器芯片,FM1602C液晶显示作为温度显示,TLC2543CN作为ADC采样转换器,STC89C58作为数字温度计控制核心相结合,设计制作了宽量程高精度多功能数字温度计。概述了数字温度计设计思路及总体方案,另外对各单元电路也做了详细分析。该数字温度计不仅分辨率高,还可以设置报警温度上下限,当温度达到高、低限温控制点时发出声光报警。
A scheme of design and implementation of digital thermometer is given. It is mainly made of LM94022 as temperature sensor,FM1602C as LED digital display,TLC2543CN as analog- to- digital converter and STC89C58 as single chip microcomputer. A muhifunction digital thermometer with wide range measuremen and high precision is designed. The basic idea and overall design of digital thermometer are introduced, as well as each design method of element circuit in detail. This digital thermometer is not only of high - resolution but also of the high and low alarm temperature point. It can be alarmed by light and sound when the temperature is beyond the limit of high and low temperature point.
出处
《现代电子技术》
2009年第13期109-112,共4页
Modern Electronics Technique
