基于AT89C52的手持式激光超声测距仪，通过启动发送超声脉冲串开始计时，接收回波结束计时，同时测量周围环境温度，利用测得的温度进行修正声音在空气中传播的速度，该速度乘上传播时间除2即得到障碍物的距离。-AT89C52-based hand-held laser ultrasonic range finder, ultrasonic pulse through the string to start sending start time, receiving echo the end of ti

this is a Ultrasonic Range Finder made to use on picaxe 08m microcontroller, nice proyect to introduce us to learn how to program micros in basic