7281可以驱动8/16位数码管。具有8*8的键盘接口，内含去抖动。-7281 8 / 16 digital control. * 8 8 with the keyboard interface, intron to tremble.

基于C51单片机开发板的礼花倒计时数码管点阵显示，采用C语言编程。-Digital countdown fireworks lattice C51 microcontroller based development board display, using the C programming language