16*16led点阵屏，有兴趣的朋友来看看，只是为了学习，所以驱动部分用了74LS145，限流电阻用820欧姆的，本人是个初学者，还望各位前辈多指点，谢谢！-16* 16led lattice screen, are interested in friends to look at, but in order to learn, so some drivers used the 74LS145, current-limiting resistor with 820 ohm, I was a beginner, but also hope that more senior advice, thank you!