洞洞板设计软件，用洞洞板做实验电路的好帮手-Hole board design software, to experiment with the circuit board hole a good helper

使用体型较小的STC12C2052实现超声波测距的功能，设计实验板为5cm*7cm的洞洞板。(The function of ultrasonic distance measurement is realized by using the smaller STC12C2052, and the cavity plate of the experimental board is 5cm*7cm.)

一款摇摇棒的设计，适用于初学者，对PCB的绘制，不仅有覆铜板还有洞洞板(The design of a rocking rod is suitable for beginners. The drawing of PCB is not only covered with copper clads but also holes.)