该文档是基于arm下的温度采集程序，硬件才赢ds18b20和数码管显示，代码可以既烧即用！-This document is based on arm the temperature collection procedures, hardware won ds18b20 and digital pipe display, the code can not only burn use!

用51单片机设计出超声波测距，并用串口显示-Design with 51 ultrasonic ranging, and serial display

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