自己设计的STC单片机学习板，有完整原理图和PCB，具有STC免手冷启动功能，省去每次烧程序都按电源开关的烦恼，一个USB线，搞定所有试验！-STC microcontroller design their own learning board, complete schematic and PCB, STC hands-free cold start function, eliminating the need for each burn program troubles by the pow