摘要：AT89C52：是一种带4K字节闪烁可编程可擦除只读存储的低电压、高性能CMOS 8位微处理器，俗称单片机。AT89C2052是一种带2K字节闪烁可编程可擦除只读存储器的单片机。单片机的可擦除只读存储器可以反复擦除100次。DS18B20具有测温系统简单、测温精度高、接线方便、占用口线少等优点。

　　独特的一线接口，只需要一条口线通信 多点能力，简化了分布式温度传感应用 无需外部元件 可用数据总线供电，电压范围为3.0 V至5.5 V 无需备用电源测量温度范围为-55 °C至+125 ℃ 。华氏相当于是-67 °F到257华氏度 -10 °C至+85°C 范围内精度为±0.5°C

　　1602字符型显示屏 1602LCD采用标准的14引脚（无背光）或16引脚（背光）接口

　　发光二极管是一种特殊类型的二极管。和普通二极管一样，发光二极管由半导体芯片，半导体材料将预混合与其他进程通过注射或出示磷，氮的架构。

关键词：AT89C52、DS18B20、1602LCD、发光二极管

ABSTRACT: AT89C52: is a flash with 4K bytes of erasable programmable read-only memory, low voltage, high-performance CMOS 8-bit microprocessor, commonly known as microcontrollers. AT89C2052 is a kind of 2K bytes of flash programmable erasable read only memory of the microcontrollers. MCU EEPROM can be erased repeated 100 times. DS18B20 with a temperature measurement system is simple, temperature measurement, high precision, easy to wire, taking the advantages of low population line Unique line interface, only one port line multi-point communications capability simplifies distributed temperature sensing applications require no external components available data bus powered, the voltage range of 3.0 V to 5.5 V without standby power measurement temperature range of -55 ° C to +125 ℃. Fahrenheit equivalent is -67 ° F to 257 ° F -10 ° C to +85 ° C within an accuracy of ± 0.5 ° C 1602 character display 1602LCD a standard 14-pin (no backlight) or 16 pins (backlight) interface Light-emitting diode is a special type of diode. And ordinary, like diodes, light emitting diodes from semiconductor chips, semiconductor materials will be pre-mixed with other processes or to produce by injection of phosphorus and nitrogen in the structure.

KEY WORDS: AT89C52, DS18B20, 1602LCD, light-emitting diodes