基于超声波的防盗窗设计 设置一定的阀值 当距离小于设置距离后 发出声光报警 蜂鸣器以一定的频率鸣响 另外两个LED交替闪烁 资料中包含 源程序 原理图 PCB-Based on the design of ultrasonic wave window set certain threshold when distance after less than set range give out sound and light alarm at a certain frequency buzzer