基于89C51单片机的四相六线步进电机控制系统，可以按键实现电机的起停，正反转及三级速度控制，并有led灯指示-89C51 microcontroller based four-phase six-step motor control system that can achieve the motor start and stop buttons, Reversible, and three speed control and have led indicator light

led blinking by 89c51 mcu

秒表设计 用89C51设计一个2位的LED数码管显示“秒表”，显示时间为00~99秒，每秒自动加1，计满显示“FF”。另设计一个“开始”按键和一个“停止”按键，按“开始”键显示秒数从00开始，按“停止”键，保持实时时间，停计时。-Stopwatch design with 89C51 design a two LED digital tube display, " stopwatch" , show time is 00 to 99 seconds, 1 second au

89C51单片机的流水灯教程通过编程手把手教育初学者了解编写单片机程序(89C51 microcontroller of water light tutorial, through programming hands to educate beginners to understand the preparation of SCM program)